Begonia lukuana Y. C. Liu & C. H. Ou

Herbs, erect. Rhizomes short. Stems to 45-90 cm tall, glabrous. Leaves all cauline; stipules caducous, narrowly ovate to ovate, to 2.8 × 2 cm; petiole 6-26 cm, glabrous; blade abaxially purple-red, adaxially usually dark green, lanceolate to narrowly ovate, asymmetric, 9-33 × 5-14 cm, remotely scaberulous, venation palmately-pinnate, 7-10-veined, base oblique, cordate, margin irregularly serrulate, apex acuminate to cuspidate. Inflorescences glabrous, 6-13 cm; peduncle to 9 cm; bracts caducous, narrowly ovate, to 2.4 × 1.5 cm, glabrous. Staminate flowers: tepals 4, white or pinkish, outer 2 obovate to very broadly ovate, 0.7-1.5 cm × 6-13 mm, inner 2 oblanceolate to narrowly obovate, 0.6-1.4 cm × 5-11 mm; stamens 64-89; filaments 1.2-1.9 mm; anthers narrowly oblong, 1.9-2.2 mm. Pistillate flowers: tepals 5(or 6), white or pinkish, glabrous, unequal to subequal, narrowly obovate to broadly ovate, largest 0.8-1.4 × 0.7-1.3 cm, smallest 7-12 × 3-7 mm; ovary glabrous, 3-loculed; placentae axile, bilamellate; styles 3, fused at base; stigmas 2-cleft, spiraled. Capsule pendulous to nodding, ovoid, 1.2-1.5 cm, unequally 3-winged; abaxial wing 1.6-2.2 cm; lateral wings smaller. 2n = 52*.

WC Taiwan (Jiayi, Nantou).

● Shaded moist forest floors, trailsides; 700-1600 m.

Begonia lukuana est une espèce de plantes de la famille des Begoniaceae. L'espèce fait partie de la section Diploclinium. Elle a été décrite en 1982 par Yeh Ching Liu et Chern Hsiung Ou.

Begonia lukuana adalah spesies tumbuhan yang tergolong ke dalam famili Begoniaceae.

Spesies ini juga merupakan bagian dari ordo Cucurbitales.

Nama ilmiah spesies ini pertama kali diterbitkan oleh Liu Yejing dan Chern Hsiung Ou pada 1982.

Begonia lukuana là một loài thực vật có hoa trong họ Thu hải đường. Loài này được Y.C.Liu & C.H.Ou mô tả khoa học đầu tiên năm 1982.

鹿谷秋海棠（学名：Begonia lukuana）是秋海棠科秋海棠属的植物。为台灣特有植物，分布在台湾海拔500~1800公尺的區域，多生长在林下，目前尚未由人工引种栽培。

鹿谷秋海棠最大的特色在葉上表面暗綠色，下表面泛紫紅色、苞片全緣、子房3室、果實不等3翼與葉柄長度等特徵能與其他種區別，部分個體植株葉片上具有白色斑點。全球僅分布於南投縣鹿谷鄉鳳凰谷鳥園及溪頭、杉林溪一帶，分布面積小於一百平方公里。