武威秋海棠 wu wei qiu hai tang

Begonia fenchihuensis S. S. Ying.

Herbs, erect, 40-125 cm tall, rhizomatous. Rhizomes short, stout. Stems glabrous or sometimes pilose. Leaves cauline or rarely basal; stipules caducous, ovate to broadly ovate, to 2.3 × 1.8 cm, glabrous, margin entire, apex acuminate; petiole 2-5 cm, sparsely hirsute; blade asymmetric, ovate-lanceolate or ovate, 8-22 × 4-8 cm, densely scabrous-hirsute, venation palmate-pinnate, 5-8-veined, base oblique, cordate, margin irregularly serrate, apex caudate-acuminate. Inflorescences glabrous; peduncle 5-7 mm; bracts caducous, narrowly ovate to ovate, ca. 2.4 × 1.7 cm, glabrous, margin entire, apex mucronate to acuminate. Staminate flowers: tepals 4, pink, outer 2 obovate, 1.2-1.4 × 0.8-1.3 cm, abaxially hirsute, inner 2 oblanceolate to narrowly obovate, 6-13 × 4-6 mm; stamens numerous; filaments free. Pistillate flowers: tepals 5(or 6), pink, subequal to unequal, oblanceolate to orbicular, ca. 1.8 × 0.8 cm; ovary triangular, scabrous-hirsute, 2- or 3-loculed; placentae bilamellate; styles 2 or 3; stigmas 2-cleft, spiraled. Capsule nodding, unequally 3-winged; abaxial wing triangular, 1.2-1.9 × 1.1-1.6 cm; lateral wings 4-6 mm. 2n = 30*.

● Forests; 1000-1600 m. S Taiwan.

This is a natural hybrid between Begonia palmata and B. taiwaniana (Peng & Chen, Ann. Missouri Bot. Gard. 78: 995-1001. 1991).