討論:秋海棠屬
山羊百科，林文智老師的植物、山岳、攝影紀錄
1. 葉密或疏被毛 (上或下表面或兩面)。
2. 葉下表面明顯被毛。
3. 葉緣具三角狀銳齒之小裂片……………7. B. laciniata巒大秋海棠
3. 葉緣具鋸齒或淺齒。
4. 葉先端尾狀漸尖，重鋸齒緣；葉柄長2-5 cm；托葉線狀披針形………3. B. buimontana武威山秋海棠
4. 葉先端漸尖，淺齒緣；葉柄長8-25 cm；托葉卵形..9. B. nantoensis南投秋海棠
2. 葉下表面光滑或極疏被毛。
5. 葉緣具小裂片狀，疏或重齒緣…………6. B. formosana水鴨腳
5. 葉不具小裂片，不規則鋸齒緣…………10. B. ravenii岩生秋海棠
1. 葉光滑。
6. 植物體無地上莖，葉與花序由地下莖長出。
7. 落葉性；托葉三角形，宿存；地下莖呈鏈珠狀.2. B. austrotaiwanensis南台灣秋海棠
7. 常綠性；托葉卵形，早落；地下莖棒狀……5. B. fenicis蘭嶼秋海棠
6. 植物體具地上莖。
8. 植物體具橫走地下莖。
9. 葉呈不規則剪裂狀……………12. B. tarokoensis
9. 葉不裂，不規則細齒緣…………………4. B. chitoensis溪頭秋海棠
8. 植物體無橫走之地下莖。
10. 葉披針形，短於12 cm，窄於4 cm……11. B. taiwaniana台灣秋海棠
10. 葉長橢圓形，長於12 cm，寬於5 cm。
11. 果無翅；葉下表面暗灰色………1. B. apter圓果秋海棠
11. 果具3翅；葉下表面紫紅色…………8. B. lukuana鹿谷秋海棠
3. Begonia buimontana Yamamoto in Journ. Soc. Trop. Agr. 5: 353. 1933; Liu & Lai in Fl. Taiwan 3: 792. 1977. 武威山秋海棠
A succulent herb; horizontal rhizomes lacking; stem glabrous or sometimes remotely pilose. 40-125 cm high, to 26 mm in diameter; stipules glabrous, caducous, ovate to broadly ovate, to 23 mm long, 18 mm broad, the apex acuminate, the margins entire. Leaves alternate, obliquely ovate-lanceolate or ovate, 8-22 cm long, 4-8 cm broad, the apex caudate-acuminate, the base unequally cordate, the margins irregularly doubly serrate, densely scabrous hirsute on both surface, especially dense along midribs and veins, the veins 5-8, sometimes villous; petioles slender, 2-5 cm long, loosely hirsute; stipules linear-lanceolate, 7-16 cm long, 1.5 cm broad, pilose outside. Bracts in pairs, thickly papery, glabrous, caducous, narrowly ovate to ovate, to 24 mm long, 17 mm wide, the apex mucronate to acuminate, the margins entire. Cymes axillary, 2- to 3-flowered; peduncles slender, 5-7 cm long, 2 mm in diam. Staminate flowers with 4 tepals, pink, the two outer tepals larger, obovate, 12-14 mm long, 8-13 mm broad, hirsute outside, the two inner smaller, oblanceolate to narrowly obovate, 6-13 mm long, 4-6 mm broad; stamens numerous, the filaments 1.5-2.8 mm long. Pistillate flower larger; tepals 2, spathulate, 1,8 cm long, 0.8 cm broad; ovary triangular, 1 cm long, glabrous, unequally 3-winged, the abaxial wing erect, much protruded, 12-19 mm long, 11-16 mm wide, the lateral wings much narrower, 4-6 mm long, 10-14 mm broad; styles 3, branched, the stigma papillose. Seeds minute and very numerous, broadly ellipsoid, 0.35-0.38 mm long, 0.19-0.22 mm thick, the apex rotund, the seed lip nipple shaped, the micropylar and constricted.
Endemic with a restricted distribution at altitudes between 1,000 and 1,600 m in southern part of the Central Mountain Range of Taiwan.
Known from Pingtung, Kaohsing and Chiayi Counties. PINGTUNG: Wuweishan, Matuda 322(Type, TAI!); Lai & Lo 197; Mt. Peitawushan, Lai 9891.
