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广西泉七

原图链接 来自植物智

中文名:广西泉七 拉丁学名:Steudnera kerrii Gagnepain 界:植物界 门:被子植物门 Angiospermae 纲:单子叶植物纲 Monocotyledoneae 目:天南星目 Arales 科:天南星科 Araceae 族:芋族 Trib. Colocasieae 属:泉七属 Steudnera 分布区域:中国广西

广西泉七(guǎng xī quán qī，学名：Steudnera kerrii Gagnepain），为单子叶植物纲、天南星科、泉七属下的一个植物种。多年生草本，产于广西。泰国也有分布。

形态特征

Herbs, evergreen. Stem rhizomatous, epigeal, erect, later decumbent with age, 2-40 × 1-1.5 cm, densely covered with tattered cataphyll and leaf remains, older parts eventually naked.

Leaves solitary to several together at shoot tips; petiole pale green, terete, 35-40 cm × 3-7 mm, sheath very short;

leaf blade strongly glaucous abaxially, deep olive-green adaxially, peltate, ovate, 10-35 × 8-14 cm, membranous, base emarginate, sinus very shallow, posterior lobes almost absent, apex cuspidate.

Inflorescence solitary, very strongly fragrant of naphtha; peduncle mid-green, terete, 6-12 cm.

Spathe outside deep yellow, inside deep purple, lanceolate, 9-10 × 2-5 cm, reflexed on opening, apex long acuminate, distal part soon withering, marcescent, proximal part persistent into fruiting.

Spadix ca. 2.5 cm × 5 mm; female zone pale creamy white, cylindric, dorsally adnate to spathe; pistil subglobose, 2-3 mm high, 0.5-1 mm in diam.; style very short;

stigma 4-lobed, exceeding style width, style and stigma tinged purple; male zone pale creamy white, clavate, free;

synandria 4-6-androus, 1-2 mm high, 1.5-2.5 mm in diam., 10-16-lobed, shortly stipitate.

Infructescence consisting of few to many berries partially covered by persistent spathe base. Berry ripening dull red, ovoid, 6-11 × 4-7 mm.

生境产地

Wet areas in seasonal evergreen forests, almost always associated with limestone; 400-600 m. SW Guangxi [N Thailand, N Vietnam].

辨析

One of us (Boyce) has collected Steudnera kerrii on the Chinese border in N Vietnam. The population almost certainly extends into adjacent Guangxi.One of us (Boyce) has collected Steudnera kerrii on the Chinese border in N Vietnam. The population almost certainly extends into adjacent Guangxi.