小花組sect. Alicida C. B. Clarke
A section of just four species from Myanmar and China.
Rhizomatous or with rhizomes from which upright stem arise.
Leaves alternate, symmetric, perianths ♂4, ♀4, ovary or fruit with 3 wings, wings equal or subequal in fruit, locules 3, placentation axillary, placental branches 2 per locule, styles 3.
精緻秋海棠組sect. Apterobegonia Warburg
2種，分布緬甸、泰國。莖直立，葉片不對稱，葉脈掌狀、雄花花被片2，雌花花被片4，子房3室，中軸胎座，每室胎座裂片2，花柱3。果實無翅或具3相等的短翅，頂端具不明顯的喙。
A section of two erect stem species from Myanmar and Thailand.
Leaves alternate, asymmetric venation palmate, perianths ♂2, ♀4, locules3, placentation axillary, placental branches 2 per locule, styles 3.
Fruit wingless or 3 equal wings, with an indistinct beak.
開普敦秋海棠組sect. Augustia (Klotzsch) A. de Candolle
12種，分布非洲大陸，主要分布於東非(6種)，至剛果、坦桑尼亞，向南達南非開普敦，安哥拉(1種)。最大特點是具有球莖或著莖基部膨大，葉片全緣或著掌狀分裂。雄花花被片2或4，雌花花被片3(5)，子房3室，中軸胎座，每室胎座裂片1，少2，花柱3。果實具3近相等的翅。
A section of 12 species from tropical Africa, East Africa (6 species), from Congo and Tanzania to South Africa, one species in Angola. Identified by combination of being tuberous or having a swollen stem, having leaves entire or palmate, perianths ♂2 or 4, ♀3(5), locules3, placentation axillary, entire placentae, styles 3. Fruit with 3 wings, equal to subequal.
漿果組sect. Baccabegonia Reitsma
A small African section with 2 species, endemic to Sao Tome and Principe.
Upright stem, woody at the base.
Leave blades ovate, perianths ♂2, ♀2, locules 5-6, placentation septal, placental branches 5-4 per locule, styles 4-6.
Fruit with 3 wings, equal to subequal.
玻利維亞秋海棠組sect. Barya (Klotzsch) A. de Candolle
A section of 3 Andean species, one species in Bolivia, 2 species in Peru.
Easily identified by pendent, scarlet flowers with perianths ♂4, ♀5 or 6, lanceolate, filaments connate into a long column, locules 3, placentation axillary, branches 2 per locule, styles 3. Fruit with 3 unequal wings.
菲律賓秋海棠組sect. Baryandra A. de Candolle
A section of about 50 species predominantly distribute in the Philippines, rarely distribute to Borneo (3 species) and New Guinea (one species).
Rhizomatous, rarely lianescent, perianths ♂4, ♀4 or 5, locules (2)3, placentation axillary, branches 2 per locule, styles 3. Fruit with 3 equal or unequal wings.
秋海棠組sect. Begonia Linnaeus
A section of about 65 species predominantly distribute in the West Indies and Brazil.
Perennials, upright stem and lacking tubers.
Leaf venation palmate or palmate-pinnate, perianths ♂4, ♀5, locules 3, placentation axillary, branches 2 per locule, styles 3.
Fruit with 3 unequal wings.
苞葉組sect. Bracteibegonia A. de Candolle
A section of 3 species from Sumatra and Java.
Rhizomatous or with rhizomes from which upright stem arise.
Leaves alternate, venation pinnate, perianths ♂(2)4, ♀5, locules 3, placentation axillary, branches 2 per locule, styles 3.
Fruit with 3 subequal wings.
等被組sect. Casparya (Klotzsch) Warburg
A section of 24 species from Centrum and South America, from Costa Rica to Peru.
Perennials with upright stems.
Flowers with perianths ♂(2)4, ♀(2)4, locules 3, placentation axillary, branches 2 per locule, rarely entire, styles 3.
Fruit with 3 subequal wings, developed into hooks.
愉悅秋海棠組sect. Chasmophila J. J. de Wilde et Plana
1種，產自西非。具黃色花，雌雄花被片2，非盾狀葉片，上部莖直立，地下具有"香腸狀"的球莖。子房3室，中軸胎座，胎座裂片每室裂片1，花柱3。果實具不等3翅，很容易識別。
A section containing a single tropical West African species that is easily recognized by its yellow flowers with perianths ♂2, ♀2, non-peltate leaves, upright stem and sausage0shaped underground tubers, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
側膜組(側膜胎座組)sect. Coelocentrum Irmscher
A section of more than 70 species from China and northern Vietnam, mainly in the karst areas.
Rhizomatous, leaves alternate, perianths ♂(2)4, ♀(2)3, locules 1, 3 parietal placentation, styles 3. Fruit with 3 subequal wings.
冠毛組sect. Cristasemen J. J. de Wilde
A section containing a single species from tropical West Africa.
Perennials, lianescent, leaves simple, non-peltate, symmetric, flowers with perianths ♂2, ♀2, ovary locules 3, placentation axillary, placental entire, styles 3, forked more than once. Fruit with 3 unequal wings.
合苞組sect. Cyathocnemis (Klotzsch) A. de Candolle
A section of 20 species from Andeans.
Perennials, upright stem, leaves simple, non-pelate, flowers with perianths ♂2, ♀2, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
東亞秋海棠組sect. Diploclinium (Lindley) A. de Candolle
A section containing about 120 species from tropical Asia, from India and Sri Lanka to Himalayas, Indo-China, China and Malaysia.
Perennials, rhizomatous or with upright stems, tuber absent or present, flowers with perianths ♂(2)4, ♀(2)3-5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3.
Fruit with 3 equal or unequal wings.
A section of seven species from Brazil.
Subshrube, leaves simple, non-peltate, symmertric, flowers with perianths ♂(2)4, ♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
一年生秋海棠組sect. Doratomertra (Klotzsch) A. de Candolle
A section of 9 species from Central and South America, some as weeds.
Annuals, stems upright, leaves simple, non-peltate, flowers with perianths ♂(2)4, ♀5, ovary locules 3, placentation axillary, placental entire or branches 2 per locule, styles 3. Fruit with 3 unequal wings.
短莖組sect. Erminea A. de Candolle
12種，產自馬達加斯加。球莖類，無直立莖或具有短縮的莖，葉片對稱，雄花被片4，雄蕊多餘6，雌花被片(4)6。子房3室內，中軸胎座，每室胎座裂片1，花柱3，果實具3不等長的翅。
A section of 12 species from Madagascar.
Acaulesent or with chort upright stems, tubers present, leaves simple, non-peltate, symmetric flowers with perianths ♂4, ♀(4-)6, stamens more than 6, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
球莖秋海棠組sect. Eupetalum (Lindley) A. de Candolle
31種，分布於安地斯山脈。球莖類，很多種類具有碩大艷麗的花朵，雄花被片4-5，雌花被片5-6，子房3室，中軸胎座，每室胎座裂片2，少1，花柱3(-5)。果實具有不相等的3翅。
A section of 31 species from Andeans. Perennials, tubers present, many of which have large colourful flowers with perianths ♂4-5, ♀5-6, ovary locules 3, placentation axillary, placental branches 2 per locule or rarely entire, styles 3(-5). Fruit with 3 unequal wings.
蕨葉組sect. Filicibegonia A. de Candolle
A section of 8 species from tropical West Africa.
Perennials, stems upright, leaves simple or pinnatifid or bipinnatifid or further divided, flowers with perianths ♂2, ♀2, ovary locules 3(-4), placentation axillary, placental entire, styles 3(-4). Fruit with 3(-4) subequal wings.
竹節秋海棠組sect. Gaerdtia (Klotzsch) A. de Candolle
A section of 11 species from Brazil.
Subshrubs, stems upright, leaves simple, asymmetric, not peltate or rarely peltate, flowers with perianths ♂4, ♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, rarely entire, styles 3. Fruit with 3 subequal wings.
美洲三室組sect. Gireoudia (Klotzsch) A. de Candolle
A section of 75 species from Mexico to Central America.
Rhizomatous, leaves simple, flowers with perianths ♂2, ♀2, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 subequal wings.
匍莖組sect. Gobenia A. de Candolle
A section of 14 species from Andeans, mainly distributed in Ecuador.
Epiphytic, leaves simple, peltate, rarely not peltate, flowers with perianths ♂4(-5), ♀5-6(-7), ovary locules 3-4, placentation axillary, placental branches 2 per locule, styles 3-4.
Fruit with 3-4 unequal wings.
p.44
雙瓣秋海棠組sect. Haagea (Klotzsch) A. de Candolle
1種。分布於印度、斯里蘭卡。
直立莖，雌雄花被片均為2，子房3室，中軸胎座，每室胎座裂片1，花柱3。果實具有3近等長的翅。
A section of a single species from India to Sri Lanka.
Upright stems, leaves simple, flowers with perianths ♂2, ♀2, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
對葉組sect. Heeringia Irmscher
1種。分布於馬來西亞。
跟狀莖，具有直立莖，葉片對稱，不偏斜，上部葉片對生。
雄花被片4，雌花被片5，子房3室，中軸胎座，每室胎座裂片2，花柱2。果實具有不相等的3翅。
A section of a single species from Malaysia.
Rhizomatous, with upright stems arise, leaves simple, symmetric, flowers with perianths ♂4 ,♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 2. Fruit with 3 unequal wings.
叉柱組sect. Hydristyles A. de Candolle
9種，分布玻利維亞。
亞灌木狀。雄花被片2，雌花被片5，子房3室，中軸胎座，每室胎座裂片2，花柱多分枝，3或4或6，果實具有3個不相等的翅。
A section of 9 species from Bolivia.
Subshrubs, leaves simple, flowers with perianths ♂2 ,♀5, ovary locules 3, placentation axillary, placental branches 3 per locule, style 3 or 4 or 6, forked more than once. Frut with 3 unequal wings.
美洲掌葉組sect. Knesebeckia (Klotzsch) A. de Candolle
58種，從墨西哥分布到安地斯山脈。
直立莖，葉片掌狀分裂。雄花被片4，少2，雌花被片5。子房3室，中軸胎座，每室胎座裂片2，花柱3，果實具有3不等長的翅。
A section of 58 species from Mexica to Andeans.
Upright stems, leaves simply or palmately lobed, flowers with perianths ♂4 or rarely 2, ♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
緬甸二室組sect. Lauchea (Klotzsch) A. de Candolle
2種，分布於緬甸。
根狀莖類，具有直立莖，葉片不偏斜。
雄花被片4，雌花被片4或5。子房2室，中軸胎座，每室胎座裂片2，花柱2，果實具有3不等長的翅。
A section of 2 species from Myanmar. Rhizomatous, with upright stems, leaves simple, symmetric, flowers with perianths ♂4, ♀4 or 5, ovary locules 2, placentation axillary, placental branches 2 per locule, styles 2. Fruit with 3 unequal wings.
棒果組sect. Leprosae (T. C. ku) Y. M. Shui
4種，分布於中國及越南北部。
根狀莖，葉片卵圓形或長橢圓形，雄花被片4，雌花被片3或5，子房3室，中軸胎座，每室胎座裂片2，花柱3。
果實肉質，棒狀。
A section of 4 species from China and North Vietnam.
Rhizomatous, leaves simple, not peltate, oval to oblong, flowers with perianths ♂4 ,♀3 or 5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit berry-like, wingless.
多葉秋海棠組sect. Lepsia (Klotzsch) A. de Candolle
4種，分布於安地斯山，從哥倫比亞、委內瑞拉 至 祕魯。
直立莖，葉片多數，小，不偏斜，葉脈羽狀。
雄花被片4，雌花被片5。子房3室，中軸胎座，每室胎座裂片1，花柱3。果實具有3個不相等的翅。
A section of 4 species from Colombia, Venezuela to Peru.
Upright stems, leaves simple, small and multitude, symmetric, flowers with perianths ♂4, ♀,5 ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
刺蓮花秋海棠組sect. Loasibegonia A. de Candolle
20種，分布於非洲。根狀莖類。
花黃色，雌雄花被片均為2，子房3-4室，中軸胎座，每室胎座裂片1，花柱3-4，果實具有3-4個近相等的翅。
A section of 20 species from Tropical Africa.
Rhizomatous, leaves simple, peltate, flowers with perianths ♂2, ♀2, ovary locules 3-4, placentation axillary, placental entire, style 3 or 4.Fruit with 3-4 subequal wings.
p.46
肉果組sect. Mezierea (Gaudichaud-Beaupre) Warburg
6種，分布於非洲大陸、馬達加斯加、馬斯克林群島、科摩羅群島、賽舌爾群島。莖直立或匍匐狀。
雄花被片2或4，雌花被片2或4。子房1室，側膜胎座3或5個，胎座裂片2。花柱3或5。果實肉質，棒狀。
A section of 6 species in tropical Africa and Madagascar, the Seychelles, the Comoros and the Mascarene Islands.
Terennials, stems erect or lianescent, perianths ♂2 or 4, ♀2 or 4, locules 3 or 5, placentation parietal, septal or rarely axillary, placental 2 branches per locule, styles 3 or 5.
Fruit berry-like, wingless.
小球莖組sect. Microtuberosa Moonlightet Tebbitt
1種，分布於祕魯。
具有矮小莖的球根草本，葉片小，掌狀葉脈。
雄花被片2-4，雄蕊2或4個，花絲基部合生。
雌花被片2-3，子房2-3室，中軸胎座，每室胎座裂片1，花柱2-3。蒴果具有相等的2-3翅。
A single species from Peru, which may be the smallest begonia in the world.
A caulescent, tuberous herb. Stems erect, leaves very small, veins palmate.
Perianths ♂2-4, ♀2-3, ovary or fruit with 2-3 equal wings, locules 2-3, placentation axillary, placentas entire, styles 2-3.
二室單座組sect. Monolobium A. de Candolle
1種，分布於中國。具有直立莖。
雄花被片4，雌花被片5，子房2室，中軸胎座，胎座裂片1，花柱2。蒴果具3不等長的翅。
A section with a single species from China.
Upright stem, perianths ♂4, ♀5, ovary 2-loculed, placentae axile, entire placentae. Fruit with 3 unequal wings.
獨葉組sect. Monophyllon A. de Candolle
2種，分布緬甸、馬來西亞。
球莖類，有直立莖。葉片1-2，掌狀葉脈。
雄花被片4，雌花被片5，子房2室，中軸胎座，每室胎座裂片2，花柱2。果實具3個不相等的翅。
A section of 2 species from Myanmar and Malaysia.
Perennials, with upright stems, tubers present, perianths ♂4, ♀5, locules 2, placentation axillary, placental 2 branches per locule, styles 2. Fruit with 3 unequal wings.
單翅組sect. Monopteron A. de Candolle
3種，分布於印度、尼泊爾、不丹、緬甸。
跟狀莖類，具有直立莖。葉片非盾狀。
雄花被片4，雌花被片5，子房2室，中軸胎座，每室胎座裂片2，花柱2或3。果實具有一個翅。
A section of 2 species from India, Nepal, Bhutan and Myanmar.
Stems upright, leaves simple, non-peltate, lanceolate-ovate, glossy green, flowers with perianths ♂4, ♀5, ovary locules 2, placentation axillary, placental branches 2 per locule, styles 2 or 3, Fruit with 1 wing.
蘚狀秋海棠組sect. Muscibegonia A. de Candolle
2種，分布於馬達加斯加。
球莖類，植株小，葉片對稱。
雄花花被片4，雄蕊3或4。雌花被片4或5，子房3室，中軸胎座，每室胎座裂片1，花柱3。果實具有3個不相等的翅。
A section containing 2 species from Madagascar.
Small herbs with tubers, leaves symmetric, not peltate.
Flowers with perianths ♂4, stamens 3 or 4, ♀4 or 5, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
脈紋胎座組sect. Nerviplacentaria A. de Candolle
7種，分布於馬達加斯加。
跟狀莖，具有直立莖。
雄花被片2(少4)，雌花被片4或5，子房3室，中軸胎座，每室胎座裂片1，花柱3，果實具有3個不相等的翅。
A section of 7 species from Madagascar.
Perennials with upright stems or with rhizomes from which upright stems arise. Flowers with perianths ♂2(4), ♀4 or 5, ovary locules 3, placentation axillary, placental entire, style 3. Fruit with 3 unequal wings.
美洲側膜組sect. Parietoplacentalia Ziesen henne
2種，分布於中美洲。灌木狀，直立莖基部木質化。
雄花被片4，雌花被片3，子房1室，側膜胎座，胎座裂片2，花柱3。果實具有3個近相等的翅。
A section of 2 species from Central America.
Subshrubs like, stem woody at base.
Flowers with perianths ♂4, ♀3, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
p.48
小秋海棠組sect. Parvibegonia (Klotzsch) A. de Candolle
30種，分布於亞洲，從印度至喜馬拉雅地區、中國、中南半島、馬來西亞。
具有球莖或根狀莖。花小，花被片小魚0.5公分，雄花花被片(2)4，雌花花被片4-6，子房2(-3)室，中軸胎座，每室胎座具2裂片，花柱2，蒴果具不等3翅。
A section containing 30 species from Asia.
Upright stems or with rhizomes.
Flowers small, with perianths less than 0.5 cm long, ♂4(2), ♀4-6, ovary locules 2-3, placentation axillary, placental branchers 2 per locule, styles 2. Fruit with 3 unequal wings.
索柯特拉秋海棠組sect. Peltaugustia (Warburg) Barkley
2種，分布於索柯特拉群島。
具有球莖，葉片盾狀。
雄花花被片4，雌花花被片6，子房3室，中軸胎座，每室胎座具1裂片，花柱3。蒴果具不相等的3翅。
A section of 2 species from socotra Archipelago.
Perennials, with tubers, leaves peltate.
Flowers with perianths ♂4, ♀6, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
等翅組sect. Petermannia (Klotzsch) A. de Candolle
約350種，主要分布東南亞，少數至中國。
具有直立莖或根狀莖，少匍匐莖。莖基部的為雌花，上部為雄花。
雄花花被片2或4，雌花花被片5。
通常雌花比雄花早開。子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具近相等的3翅。
A section contaning about 350 species from tropical Asia, mainly in Southeast Asia, a few species in China.
Perennials, usually with upright stems or rhizomatous or rarely lianescent.
Most of these species have inflorescences that are often divided into a basal part that consists of a solitary or pair of female flowers and an apical part that is racemose and consists a few to several male flowers.
Flowers with perianths ♂2 or 4, ♀5, female flowers open before the male flowers, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 subequal wings.
美洲單座組sect. Pilderia (Klotzsch) A. de Candolle
6種，分布於安地斯山脈，從委內瑞拉、圭亞那、哥倫比亞、厄瓜多爾至祕魯。
根狀莖或直立莖。雄花花被片2或4，雌花花被片5。子房3室，中軸胎座，每室胎座裂片1或2，花柱3。蒴果具3不相等的翅。
A section containing six species from Andeans, distributing from Venezuela, Guyana, Colombia, Ecuador to Peru.
Rhizomatous or upright stems.
Flowers with perianths ♂2 or 4, ♀5, ovary locules 3, placentation axillary, placental entire or branches 2 per locule, styles 3. Fruit with 3 unequal wings.
二室組(扁果組)sect. Platycentrum (Klotzsch) A. de Candolle
120餘種，分布亞洲，從印度、喜馬拉雅地區、中國、中南半島至馬來西亞。根狀莖，通常具直立莖，單葉或長狀副業，葉片全緣或長狀分裂。
雄花花被片4，雄蕊輻射狀。雌花花被片5，子房2室，中軸胎座，每室胎座裂片2，花柱2(少3)。蒴果具3不相等翅，其中一翅較大。
A section of 120 species from Asia, distributing from India to Himalayas, China, Indo-China and Malaysia.
Rhizomatous, usually with upright stems, leaves simple or palmately compound. Flowers with perianths ♂4, ♀5, ovary locules 2, placentation axillary, placental branches 2 per locule, styles 2 or rarely 3. Fruit with 3 unequal wings.
巴西秋海棠組sect. Pritzelia (Klotzsch) A. de Candolle
約130種，南美洲的大組，分布於巴西。
具有根狀莖或直立莖。
雄花花被片4(少2)，雌花花被片5(-7)，子房3室，中軸胎座，每室胎座裂片1，少2。花柱3，蒴果具3翅。
A section of 130 species from Brazil.
Rhizomatous or with upright stems, leaves symmetric, not peltate.
Flowers with perianths ♂4 rarely 2, ♀5-7, ovary locules 3, placentation axillary, placental entire or rarely branches 2 per locule, styles 3. Fruit with 3 equal or unequal wings.
球芽組sect. Putzeysia (Klotzsch) A. de Candolle
1種，分布在印度。
具有根狀莖，生有直立莖，葉基部生有珠芽，葉片機不偏斜，葉脈長狀。
雄花花被片4，雌花花被片5，子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具近相等3翅。
A section of a single species from India.
Rhizomatous or with upright stems, tuber in leaf axil present, leaves asymmetric, venation palmate. Flowers with perianths ♂4, ♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 subequal wings.
p.50
四裂組sect. Quadriobaria A. de Candolle
19種，分布馬達加斯加。
具根狀莖或直立莖。雄花花被片2，雌花花被片2或4，子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具3翅。
A section of 19 species from Madagascar. Rhizomatous or with upright stems.
Flowers with perianths ♂2, ♀2 or 4, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3.
Fruit with 3 equal or unequal wing3.
美洲珠芽組sect. Quadriperigonia Ziesenhenne
17種，分布墨西哥。
具有直立莖，常出現球莖，葉腋常有珠芽。總狀花序頂生，雄花花被片4(少2)，雌花花被片5(少2或4)，子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具不等3翅。
A section of 17 species from Mexico.
Upright stems, tubers usually present, tubercles in leaf axil present, inflorescence terminal, raceme of cymes.
Flowers with perianths ♂4(rarely 2), ♀5 (rarely 2 or 4), ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
單座組sect. Reichenheimia (Klotzsch) A. de Candolle
50種，分布熱帶亞洲。
根狀莖或球莖，雄花被片4，雌花被片3或4(少2、5、6)。子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具近相等的3翅。
A section of 50 species from tropical Asia.
Rhizomatous or tubers.
Flowers with perianths ♂4, ♀3 or 4 (rarely 2,5,6), ovary locules 3, placentation axillary, placental entire, styles3. Fruit with 3 subequal wings.
亞洲盾葉組sect. Ridleyella Irmscher
3種，分布於泰國、馬來西亞。
根狀莖，葉片不對稱，盾狀。
雄花被片3或4，雌花被片3或4，子房2室，中軸胎座，每室胎座裂片1，花柱3。蒴果具3不相等的翅。
A section of 3 species from Thailand and Malaysia.
Rhizomatous, leaves asymmetric, peltate.
Flowers with perianths ♂3 or 4, ♀3 or 4, ovary locules 2, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
羅斯曼秋海棠組sect. Rossmannia (Klotzsch) A. de Candolle
1種，分布安地斯山脈。具有直立莖，葉片羽狀賣。
雌雄花被片2，子房3室，中軸胎座，每室胎座裂片2，花柱3，蒴果具3不等翅。
A section contains a single species from Andeans.
Upright stems, leaves simple, venation pinnate.
Flowers with perianths ♂2, ♀2, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3.
Fruit with 3 unequal wings.
環毛組sect. Rostrobegonia Warburg
10種，分布於非洲。具有直立莖或根狀莖，雄花被片(2)4，雌花被片(3)5，子房3室，中軸胎座，每室胎座裂片1或2，花柱3，蒴果具3翅。
A section of 10 species from tropical Africa.
Rhizomatous or upright stems, flowers with perianths ♂, ♀, ovary locules 3, placentation axillary, placental entire or branches 2 per locule, styles 3. Fruit with 3 equal or unequal wings.
榿(ㄑ一)葉秋海棠組sect. Ruizopavonia A. de Candolle
33種，分布中美洲至安地斯山脈。
具有直立莖，部分種類藤本狀。
雄花花被片2或4，雌花花被片2-5，子房3室，中軸胎座，每室胎座裂片2，花柱3，蒴果具3不相等的翅。
A section of 33 species from Central America to Andeans.
Upright stems or scandent.
Flowers with perianths ♂2 or 4, ♀2-5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
五葉秋海棠組sect. Scheidweileria (Klotzsch) A. de Candolle
6種，主要分布巴西，其中1種分布到哥倫比亞和玻利維亞。
具有較高的直立莖，葉片掌狀複葉或單葉掌狀分裂。
雄花花被片4，雌花花被片5，子房3室，中軸胎座，每室胎座裂片1，花柱3，蒴果具近等3翅。
A section of 6 species from Brazil and Colombia to Bolivia.
Upright stems, leaves simple or palmately compound.
Flowers with perianths ♂4, ♀5, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
p.52
非洲盾葉組sect. Scutobegonia Warburg
22種，分布於非洲。
根狀莖，葉片盾狀。
雌雄花被片2，子房3或4室，中軸胎座，每室胎座裂片1，花柱3-4。果實具3-4近等翅。
A section of 22 species from Africa.
Rhizomatous, leaves simple, peltate.
Flowers with perianths ♂2, ♀2, ovary locules 3 or 4, placentation axillary, placental entire, styles 3-4 subequal wings.
少蕊秋海棠組sect. Semibegoniella (C. de Candolle) Barkleyet Baranov
13種，分布哥倫比亞至祕魯。
直立莖，單葉羽狀脈。
雄花花被片4，雌花花被片4(-6)或合生成筒狀。子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具3近等長的翅。
A section of 13 species from Colombia to Peru.
Upright stems, leaves simple, venation pinnate.
Flowers with perianths ♂4, ♀4(-6), ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
安諾本秋海棠組sect. Sexalaria A. de Candolle
1種，分布於西非熱帶地區。
具直立莖，葉脈掌狀，葉炳和葉片機不具有顯著的毛。
雄花被片4，雌花被片5-6。子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具3-6不等長翅。
A section of a single species from tropical West Africa.
Upright stems, leaves simple, venation palmate.
Flowers with perianths ♂4, ♀5-6, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3-6 unequal wings.
茄蕊組sect. Solananthera A. de Candolle
3種，分布巴西東部。藤本狀，莖匍匐，葉片具羽狀脈。
雄花被片4，雌花被片5，子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具不等3翅。
A section of 3 species from East Brazil.
Lianescent, leaves simple, venation palmate.
Flowers with perianths ♂4, ♀5, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
四室組(無翅組)sect. Sphenanthera (Hasskarl) Warburg
約30種，分布亞洲。根狀莖，或具有較高直立莖，雌雄一株。
雄花被片4，雌花5(-7)，子房3或4室，中軸胎座，每室胎座裂片2，花柱3或4，果實漿果狀，無翅。
A section of 30 species from tropical Asia.
Rhizomatous, with upright stems, leaves simple.
Dioecism. Flowers with perianths ♂4, ♀5(-7), ovary locules 3-4, placentation axillary, placental branches 2 per locule, style 3-4. Fruit berry-like, wingless.
鱗苞秋海棠組sect. Squamibegonia Warburg
3種，分布非洲。附生，具有直立莖。
花絮被明顯苞片包裹，雌雄花被片2，雌花花被片機不合生成筒狀。
子房4(-5)室，中軸胎座，每室胎座裂片2，花柱4(-5)，蒴果肉質，無翅。
A section of 3 species from tropical Africa.
Epiphytic herb, with upright stems and bract-like structures surround the inflorescence.
Male flowers perianth 2, female flower fused into a long, narrow tube at the base. Ovary locules 4(-5), placentation axillary, placental branches 2 per locule, style 4(-5). Fruit berry-like, wingless.
合被秋海棠組sect. Symbegonia (Warburg) L. L. Forrest et Hollingsworth
13種，分布新幾內亞。直立莖。
雄花被片合生成筒狀，5裂。子房3室，中軸胎座，每室胎座裂片2，花柱3，蒴果具3等翅。
A section of 13 species from New Guinea.
Upright stems, leaves simple, not peltate.
Flowers fused together into a tube, male flower 2 lobed about half of the tube length, female flower 5 lobed, ovary locules 3, placentation axillary, placental branches 2 per locule,styles 3. Fruit with 3 equal wings.
美洲四室組sect. Tetrachia Brade
1種，分布巴西東部。亞灌木狀，直立莖機不木質化，葉片盾狀，雄花被片2，雌花被片6，子房4室，中軸胎座，每室胎座裂片2，花柱4。蒴果具4近相等的翅。
A section of a single species from East Brazil.
Subshrubs, with upright stems, stem woody at base. Leaves simple peltate.
Flowers with perianths ♂, ♀6, ovary locules 4, placentation axillary, placental branches 2 per locule, styles 4. Fruit with 4 subequal wings.
p.54
非洲四被組sect. Tetraphila A. de Candolle
31種，主要分布非洲(30種)，1種分布老挝和泰國。
具有直立莖，葉片對稱，厚革質。
雌雄花被片均為4，子房2-4(少5)，側膜胎座，隔膜胎座或中軸胎座，胎座裂片2，花柱2-4(-6)。蒴果無翅，漿果狀。
A section of 31 species from Africa (30 species), and one species in Laos and Thailand.
Upright stems, leaves symmetric, Flowers with perianths ♂4, ♀4, ovary locules 2-4(-5), placentation parietal or septal or rarely axillary, placental brancher 2 per locule, styles 2-4(-6).
Fruit berry-like, wingless.
糙果組sect. Trachelocarpus (C. Muller) A. de Candolle
6種，分布巴西東部。附生草本，具有根狀莖，葉片革質，披針形。雌花生於根狀莖上，花被片3。雄花有向上的花梗，花被片2。子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具近相等3翅。
A section of 6 species from East Brazil.
Epiphytics, rhizomatous, leaves simple, leathered, lanceolate.
Male flowers with pedicel erect, female flowers on the rhizomatous.
Flowers with perianths ♂2, ♀3, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
灌木秋海棠組sect. Trendelenburgia (Klotzsch) A. de Candolle
1種，分布巴西東部。
具有直立莖，基部木質化。
雄花被片4，雌花被片4-6，子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具有3近等長的翅。
A section of a single species from East Brazil.
Upright stems, stem woody at base.
Flowers with perianths ♂4, ♀4-6, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
壺狀秋海棠組sect. Urniformia Houghton ex Ziesen henne
1種，分布中美洲。
附生草本，具直立莖。
雄花被片4，雌花被片3，子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具有3近相等的翅。
A section of a single species from Central America.
Epiphytics with upright stems.
Flowers with perianths ♂4, ♀3, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 subequal wings.
攀緣秋海棠組sect. Wageneria (Klotzsch) A. de Candolle
8種，分布中南美洲。
藤本狀，莖匍匐，葉片對稱不偏斜。
雄花被片4，雌花被片5，子房3室，中軸胎座，每室胎座裂片1，花柱3。蒴果具有不相等3翅。
A section of 8 species from Central America.
Lianescent, stem woody at the base, leaves simple symmetric.
Flowers with perianths ♂4, ♀5, ovary locules 3, placentation axillary, placental entire, styles 3. Fruit with 3 unequal wings.
沃伯格秋海棠組sect. Warburgina O. Kuntze
1種，分布玻利維亞。
具直立莖，葉片機不偏斜，葉脈羽狀。
雄花被片2，雌花被片4，子房3室，中軸胎座，每室胎座裂片2，花柱3。蒴果具有3不相等的翅。
A section of a single species from Bolivia.
Upstems, leaves symmetric, not peltate.
Flowers with perianths ♂2, ♀4, ovary locules 3, placentation axillary, placental branches 2 per locule, styles 3. Fruit with 3 unequal wings.
美洲二室組sect. Weilbachia (Klotzsch et Oersted ex Klotzsch) A. de Candolle
25種，分布中美洲。具有根狀莖。
雄花被片2或4，雌花被片2-4，子房2室，中軸胎座，每室胎座裂片2，花柱(2-)3。蒴果具有1-3不相等的翅。
A section of 14 species from Central America.
Rhizomatous. Flowers with perianths ♂2 or 4, ♀2 or 4, ovary locules 2, placentation axillary, placental branches 2 per locule, styles (2-)3. Fruit with 1-3 unequal wings.
創作內容
世界秋海棠屬分組簡介 Sectional classification of the Begonia in the world
紀錄 (26)
