Begonia × chungii
鍾氏秋海棠
endemic
Begonia × chungii C.-I Peng & S. M. Ku
名彙資訊
特徵描述
典藏標本
數位照片
分布位置
相關資訊
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名彙資訊
學名發表文獻
C.-I Peng & S. M. Ku, Botanical Studies 50: 241. fig. 1, 2. 2009. (Bot. Studies)
台灣首次記錄發表文獻
同發表文獻
異名
無
各語言俗名
無
特徵描述
生活型
herb
形態特徵
- Erect, perennial, succulent herb with poorly developed rhizomes. Stems ±zigzag, pilosulose at first, later glabrescent, 50–80 cm high, to 4–9 mm thick, internodes 7–26 cm long. Stipules glabrous, caducous, triangularlanceolate, 10–20 mm long, 5–7 mm wide, apex acuminate, margin entire.
- Leaves adaxially sparsely pilosulose or scaberulous, abaxially sparingly pilosulose on major veins, oblique, ovate to narrowly ovate, 11–24 cm long, 5–15 cm wide, apex acuminate to caudate, base obliquely cordate, margins serrate, shallowly lobed and irregularly serrulate or denticulate; venation palmate-pinnate, basal veins 6–7; petioles pilosulose or puberulent, later glabrescent, 10–23 cm long, to 4–7 mm across. Bracts glabrous or near so, caducous, narrowly ovate to narrowly triangular, 5–20 mm long, 2–8 mm wide, apex acuminate, margin ciliate.
- Inflorescence 4–9 cm long, axillary; peduncles ascending, subglabrous or sparsely pilosulose, 3–8 cm long, 2–3.5 mm thick. Tepals white. Staminate flowers: pedicel ca. 2.5 cm, tepals 4, decussate, outer two broadly obovate to orbicular, 15–25 mm long, 10–18 mm wide, inner two oblanceolate to narrowly obovate, 7–20 mm long, 5–8 mm wide; androecium actinomorphic, ovoid, without androphore, stamens ca. 60–80, golf-club shaped, anthers narrowly obovoid to oblong, yellow, 2–3 mm long, 0.9–1.1 mm across, connective apex protruding, filaments 1.6–2.7 mm long (upper stamems longer), fused to a short central column. Pollen grains irregular, shriveled and unstainable. Carpellate flowers: pedicel 1.3–2 cm long, tepals 5(–6), unequal to subequal, obovate, to oblong, the largest 15–21 mm long, 13–17 mm wide, the smallest 9–15 mm long, 6–9 mm wide; styles 3, yellow, 4.9–5.3 mm long, at their base fused ca. 0.5 mm long, each bifid; ovary nodding or somewhat pendent, trigonous-ellipsoid, 3-locular, longitudinally shallowly grooved between the locules, 3- winged; placentae axile, bilamellate.
- Somatic chromosome number, 2n = 22.
引證標本
TAIWAN. Nantou County, Luku Township, Hsitou, Peng 15911 (HAST).