羽狀脈 的英文怎麼說
中文拼音 [yǔzhuàngmài]
羽狀脈
英文
pinnate vein-
Leaves tufted ; stipes 15 - 30 cm long, densely scaly at base, glabrous above ; sterile lamina about 60 cm long and 20 cm wide, simply pinnate ; pinnae numerous, alternate or subopposite, linear - lanceolate, the largest about 12 cm long and 1 cm wide, base cordate, apex acuminate, margin finely toothed ; veins close, forking once or twice and forming areoles near the midrib ; fertile lamina similar to sterile ones, but somewhat reduced, about 8 cm long and 0. 4 cm wide, lower surface almost entirely covered with sporangia
葉簇生；葉柄長15 - 30厘米，基部密被鱗片，向上近光滑；不育葉片長約60厘米，寬20厘米，一回羽狀；羽片多數，互生或近對生，線狀披針形，最長者長達12厘米，寬約1厘米，頂端長漸尖，基部心形，邊緣有細密鋸齒；葉脈1 - 2次分叉，近中脈形成網眼；能育葉與不育葉相似，但較小，長約8厘米，寬約0 . 4厘米，下部滿布孢子囊。Leaves crowded near apex of the trunk, spirally arranged ; stipes dark brown, with sharp spines ; lamina large, oblong, tripinnate ; pinnae 17 - 20 pairs, alternate, longest one to 60 cm long, the basal one reduced ; rachis short - spiny ; pinnules 18 - 20 pairs, sessile or nearly so, lanceolate, to 10 cm long and 2. 5 cm wide, divided almost to the costa ; segments more or less falcate, toothed
葉螺旋狀排列，聚生於莖端；葉柄棕色，具銳刺；葉片大，長矩圓形，三回羽狀深裂；羽片17 - 20對，互生，最大的長達60厘米，基部一對縮短，羽軸有短刺；小羽片18 - 20對，無柄或近於無柄，披針形，長達10厘米，寬2 . 5厘米，深裂幾達中脈；末回裂片多少鐮狀，有齒。
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