Asarum villisepalum

神秘湖細辛

endemic

Asarum villisepalum C. T. Lu & J. C. Wang

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. T. Lu & J. C. Wang, Botanical Studies 50: 232. fig. 3, 4I-L. 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

參考資料

Chang-Tse LU and Jenn-Che WANG, Botanical Studies 50: 229-240. 2009. (Bot. Studies)

特徵描述

生活型

herb

形態特徵

Perennial herbs. Plants forming clumps. Adventitious roots glabrous, as thick as rhizome. Rhizomes glabrous, suberect; annual vegetative branch with 2 cataphylls at base; cataphylls membranous, hyaline, sessile, oblong, both surfaces glabrous, margin hairy, apex obtuse.
Leaves long petiolate; petiole ca. 9–15 cm, adaxially hairy, grooved, dark purple; blade triangular-oblong to triangular-ovate, 10–14 cm long, 7–13 cm wide, margin undulate, base cordate, basal lobes 2, 3–4 cm long, 3–4 cm wide, apex acute to acuminate; upper surface usually dark green, glabrous, with white blotches, lower surface pale green; young leaves adaxially and margin usually with short hairs.
Flowering branches with 2 cataphylls at base, cataphylls ovate, glabrous on both surfaces, margin hairy. Flowers solitary, axillary, dark maroon, decumbent on ground; pedicel glabrous, ca. 1 cm long; calyx tube obconic, 10–14 mm long, basally 7–8 mm wide, apically 11–14 mm wide, glabrous outside; calyx lobes 3, spreading obliquely, usually not undulate, triangular to ovate, 8–15 mm long, 11–15 mm wide, abaxially glabrous, adaxially white villous; tubercles between orifice and calyx lobes white; inside reticulate ridged, longitudinal ridges 24 basally, 12 apically; calyx tube opening less than 8 mm in diam.; orifice ring ca. 1 mm wide; stamens 12, in 2 whorls, 2–2.5 mm long, filaments short, anthers extrorse, ca. 1.5 mm long, apex of connective rounded; ovary semi-inferior, locules 6, fused; styles 6, free; stylar protuberances 2 lobed, apex horn-like; styles equal to or slightly shorter than calyx tube; stigma elliptic or lachrymiform, lateral on style; ovules 8 per locule.
Somatic chromosome number 2n = 24.

物候

Flowering from March to May.

分布

台灣 : only in Shenmihu Nature Preserve Area, ca. 1,000 m and Hoping logged trail, occurs in heavily shaded, moist, broadleaved forests on mountain slopes.

引證標本

ILAN COUNTY: Nanao Township, Chinyang Nanao Broadleaved Forest Preserve, C.I Peng et al. 13812 (HAST), 13813 (HAST); Shenmihu Nature Preserve Area, C.C. Liao et al. 1758 (HAST), C.T. Lu 579 (TNU), Lake Shenmihu, S.F. Huang et al. 5200 (TAI), HUALIEN COUNTY. Hsiulin Township, Hoping logged trail 28–32 K, S.C. Liu 2619 (TNU).