本文報導採自台灣北部的新天然雜交種秋海棠,台北秋海棠(Begonia xtaipeiensis),并提供拉丁文描述、植物繪圖與分布圖。由形態特徵、地理分布、茶粉可染度、種子結實率、染色體細胞學觀察以及人工雜交試驗,初步證實台北秋海棠為水鴨腳(B.formosana(Hayata)Masam.)與圓果秋海棠(B.apetra Blume)的天然雜交F1後裔。雖然台北秋海棠目前僅發現於台北懸汐止與鳥來海拔約200至500公尺的山區林道旁濕潤之土坡或岩壁,但其親本植物廣布於台彎北部山區,且生育地多有重疊,透過更仔細的調查與研究,或將發現更多的台北秋海棠族群。
A new natural hybrid of Begonia, B. xtaipeiensis, from northern Taiwan is described and illustrated. It grows on moist, rocky slopes on forest margins at 200-500m elevation. Based on a comparison of morphology, geographical distribution, pollen stainability, seed set, cytological observations, and experimental crosses, we conclude that B. xraipeiensis represents F1 progeny from natural hybridization between B. formosana (Hayata) Masam. [sect. Platycentrum (Klotzsch) A. DC.]and B. aptera Blume [sect. Sphenanthera (Hassk.) Warb.].