• iflora 中国高等植物资源和DNA条形码物种鉴定数据库公共服务平台







Pseudotaxus W. C. Cheng


2. Pseudotaxus W. C. Cheng, Res. Notes Forest. Inst. Nat. Centr. Univ. Nanking, Dendrol. Ser. 1: 1. 1947. 白豆杉属 bai dou shan shu Nothotaxus Florin.Shrubs evergreen, dioecious; branches usually whorled; branchlets subopposite or subwhorled, base with persistent bud scales; winter bud scales overlapping, ridged adaxially. Leaves spirally arranged, distichous; petiole very short or leaves sessile; blade linear, basally twisted, straight or slightly falcate, midvein raised both adaxially and abaxially, abaxial stomatal bands 2, white, resin canal absent, base obtuse, decurrent, apex mucronate. Reproductive structures axillary, solitary, sessile. Pollen cones globose, with 4 pairs of decussate basal bracts; microsporophylls 6-12, shieldlike, decussate; pollen sacs 4-6, radially arranged. Seed-bearing structures with 7 pairs of decussate basal bracts in 4 series each of 3 or 4 bracts. Ovule erect, sessile. Aril white when ripe, cupular, succulent. Seed ripening in 1st year, nutlike, ovoid, slightly flattened, enclosed within aril except for distal, exposed part, apex with a small mucro. Cotyledons 2. Germination epigeal. 2n = 24 *. * One species: China. 【引自:Flora of China】