中国马鞭草科一新归化种——南假马鞭

Stachytarpheta australis Moldenke(Verbenaceae),A Newly Naturalized Species for China

首次报道了中国一新归化种——南假马鞭Stachytarpheta australis Moldenke,该种与《中国植物志》收录的假马鞭Stachytarpheta jamaicensis(Linn.)Vahl有明显的区别。南假马鞭叶膜质或纸质,叶柄长0.3～1 cm;穗状花序纤细,长15～45 cm,直径约3 mm,被短柔毛,序轴柔韧,凹穴几乎和序轴等宽,苞片狭披针形,长约5 mm,花萼被毛,花冠浅蓝色或几乎白色。假马鞭叶稍肉质,叶柄长0.3～3.5 cm;穗序花序较粗硬,长15～50 cm,直径达7 mm,光滑无毛,序轴硬,凹穴明显比序轴窄,苞片披针形或长椭圆状披针形,长5～8 mm,花萼无毛,花冠常紫红色、蓝色或紫色。

In this paper,we report on a newly recorded naturalized plant in China,Stachytarpheta australis Moldenke.This species was obviously different from Stachytarpheta jamaicensis（Linn.） Vahl,which had been recorded in ＂Flora of China＂previously.Its leaves were membranous or chartaceous,petioles 0.3-1 cm long,spikes slender,15-45 cm long,ca.3 mm in diameter,usually short-pubescent throughout,rachis somewhat flaccid,the furrows nearly as wide as the rachis,bracts narrowly lanceolate,ca.5 mm long,calyx hairy,corolla pale blue or almost white.In S.jamaicensis,however,leaves are somewhat fleshy,petioles 0.3-3.5 cm long,spikes stout and stiff,15-50 cm long,up to 7 mm in diameter,glabrous,rachis stout and firm,the furrows conspicuously narrower than the rachis,bracts lanceolate or oblong-lanceola-te,5-8 mm long,calyx hairless,corolla usually mauve,blue,violet or purple.