广东薄唇蕨属(水龙骨科)一新种——卵叶薄唇蕨

Leptochilus ovatifolius,a New Species of Polypodiaceae from Guangdong

报道了发现于中国广东省阳春市的薄唇蕨属卵叶薄唇蕨(Leptochilus ovatifolius)一新种,该种与心叶薄唇蕨(L.cantoniensis)相似。主要区别在于前者营养叶为卵形至长卵形,叶基下沿呈楔形,营养叶叶柄长0.3~1.4 cm,孢子叶叶柄长8~14 cm,叶表面均匀分布明显下陷的水囊;而心叶薄唇蕨营养叶叶形为卵形至心形,基部截形或凹陷呈心形,营养叶叶柄长1~6.5 cm,孢子叶叶柄长20~35 cm,叶表面无明显水囊。

A new species of Polypodiaceae,Leptochilus ovatifolius Zhe Zhang,S.W.Yao&Yi Huang from Yangchun City in Guangdong Province was reported.The species was similar to L.cantoniensis,but can be easily distinguished by its ovate to long ovate sterile fronds with cuneate bases and shorter stipes(0.3-1.4 cm),stipes of fertile fronds(8-14 cm),and its hydathodes usually distinctly sunken on whole surface of laminae.However,L.cantoniensis has ovate to cordate sterile fronds with base truncate to cordate,longer sterile fronds stipes(1-6.5 cm)and fertile fronds stipes(20-35 cm),hydathodes indistinct on the laminae.