basal vein meaning in English
基底静脉
Examples
- Sori 1 - 5 pairs borne on the lower surface of ultimate lobes at the end of basal veins ; indusium dehiscent in two equal halves when mature
孢子囊群1 - 5对，生于末回裂片下面近基部小脉顶端；囊群盖成熟时对开2裂。 - Leaves ternate ; leaflets papery or nearly leathery , ovate to ovate - elliptic , 6 - 15 cm long and 3 - 7 cm wide , apex abruptly acuminate , base rounded to subcordate , entire , both surfaces glabrous ; basal veins 3 , lateral veins 4 - or 5 - paired , conspicuous on both surfaces ; petiolules 1 . 5 - 2 cm long , glabrous
叶为三出复叶；小叶纸质或近革质，卵形至卵状椭圆形，长6 - 15厘米，宽3 - 7厘米，先端突尖，基部圆形至近心形，全缘，两面无毛；常有基出3出脉，侧脉4 - 5对，两面均明显；小叶柄长1 . 5 - 2厘米，无毛。