浙江瑞香科一新种——尖萼荛花

Wikstroemia acutisepala(Thymelaeaceae),a New Species from Zhejiang Province

描述了产自浙江的荛花属Wikstroemia Endl.(瑞香科Thymelaeaceae)一新种——尖萼荛花W.acutisepala W.Y.Xie,Z.H.Chen et X.F.Jin,并附有线描图.新种与北江荛花W.monnula Hance相似,不同之处在于花萼长1~1.6 cm,裂片长三角形或狭卵状三角形,长4~5 mm,先端渐尖或骤渐尖;上轮雄蕊着生于萼筒1/2~4/5处,下轮着生于萼筒1/4~2/5处;花盘鳞片1枚,近圆筒形,1侧裂至花盘,先端2~4微裂或啮蚀状,稀半圆筒形而不裂,长为子房的1/5~1/2;核果长3.3~4.2 mm,直径2.2~2.7 mm;种子长2.5~3 mm,直径1.5~1.7 mm.

Wikstroemia acutisepala W.Y.Xie,Z.H.Chen et X.F.Jin(Thymelaeaceae),from Zhejiang,eastern China,is described and illustrated as a new species.It is similar to W.monnula Hance,but differs in having calyx 1-1.6 cm long,lobes long triangular or narrowly ovate-triangular,4-5 mm in length,apex acuminate or abruptly acuminate.The upper whorl of stamens is inserted at 1/2-4/5 of calyx tube,and the lower whorl at 1/4-2/5 of calyx tube.There is one disk scale,near cylindrical,with one side divided to the disk,apex 2-4 slightly divided or rodent shape,rarely semi-cylindrical without division,1/5-1/2 as long as ovary,drupe(3.3-4.2)mm×(2.2-2.7)mm,seed(2.5-3)mm×(1.5-1.7)mm.