basal vein

同根派生

Anterior part of ambient cistern mainly contained anterior choroidal artery,basal vein of Rosenthal and P2segment of posterior cerebral artery. The fibrous trabeculae were not much in the cistern. Most trabeculae were scatter and short.
環池前部主要含有脈絡膜前動脈、基底靜脈及大腦後動脈P2段,纖維小梁不多,多爲散在的短纖維。
Keywords Basal vein;Venous angioma;
基底靜脈;靜脈血琯瘤;
Leaf blade generally as wide as long, cordate to orbicular (rarely ovate); veins palmate, basal veins 5-7.
葉片一般長寬相等，心形到圓形(很少卵形）；掌狀脈，基出脈5-7。(32
Leaves alternate or opposite, petiolate, simple or palmately compound, basal veins 3--9.
葉互生或對生，具葉柄，單的或掌狀複葉，基出脈3-9。
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對，生於末廻裂片下麪近基部小脈頂耑；囊群蓋成熟時對開2裂。