叶互生，具叶柄，薄革质或纸质，上半部边缘具牙齿，很少全缘，侧脉2或3对，低的离基三出脉。
Leaves alternate, petiolate, thinly leathery or papery, margin dentate in apical half , rarely entire, lateral veins 2 or 3 pairs, lowest triplinerved.
箭叶橐吾的三个自然居群，总计62个个体，使用17个随机引物，共扩增出128个多态位点。
Three natural population of l. Sagitta, add up to 62 individual, with 17 random primers, 128 polymorphic loci.
通过先驱体转化法，制备出三叶形、三折叶形和T形截面碳化硅纤维。
Trilobal, swirl-shaped and T-shaped SiC fibers were prepared from precursor polymer.
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