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.
环池前部主要含有脉络膜前动脉、基底静脉及大脑后动脉P2段,纤维小梁不多,多为散在的短纤维。
Keywords Basal vein;Venous angioma;
基底静脉;静脉血管瘤;
Leaf blade generally as wide as long, cordate to orbicular (rarely ovate); veins palmate, basal veins 5-7.
叶片一般长宽相等，心形到圆形(很少卵形）；掌状脉，基出脉5-7。(32
Leaves alternate or opposite, petiolate, simple or palmately compound, basal veins 3--9.
叶互生或对生，具叶柄，单的或掌状复叶，基出脉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。