斗竹
斗竹 |
中文名:斗竹 学 名:Oligostachyum spongiosum (C. D. Chu et C. S. Chao) G. H. Ye 界:植物界 门:被子植物门 Angiospermae 纲:单子叶植物纲 Monocotyledoneae 目:禾本目 Graminales 科:禾本科 Gramineae 亚 科:竹亚科 Bambusoideae 族:北美箭竹族 ARUNDINARIEAE 亚 族:北美箭竹亚族 Subtrib. Arundinariinae 属:少穗竹属 Oligostachyum 种:斗竹 分布区域:中国广西 超 族:北美箭竹超族 ARUNDINARIATAE |
斗竹(dǒu zhú),学名:Oligostachyum spongiosum (C. D. Chu et Chao) Ye et Z. P. Wang,异名:Arundinaria spongiosum Sinobambusa anaurita Acidosasa bilamina Pleioblastus altiligulatus var. spongiosus Arundinaria spongiosa ,为禾本科少穗竹属下的一个种。 [1]
目录
斗竹形态特征
秆高达 10m,径 4-6cm, 节间长20-40cm,幼秆稍被白粉,节下尤明显 。秆箨红褐色 ,密被上向的紫褐色糙硬毛,边缘具缘毛;箨耳和遂毛不发育或仅有几枚遂毛;
箨舌极短,微弓形,高约1mm,先端具纤毛;箨叶狭三角形或三角状披针形,直立,微皱,长1.5-3cm。每节分枝3枚,小枝具叶3-5枚,叶片披针形或线状披针形,长9-17cm,宽1-2cm。
Arundinaria spongiosa C. D. Chu & C. S. Chao, J. Nanjing Technol. Coll. Forest Prod. 1981(3): 33. 1981; Acidosasa bilamina W. T. Lin & Z. M. Wu; Pleioblastus altiligulatus var. spongiosus B. M. Yang; Sinobambusa anaurita T. H. Wen.
Culms to 10 m, 4–6 cm in diam.; internodes green, becoming yellow-green, 20–40 cm, weakly grooved above branches, white powdery especially below nodes, glabrous, pith spongy; nodes elevated.
Culm sheaths red-brown when fresh, gray-brown when dry, apex triangularly attenuated, strewn with brown strigose hairs or later with striae, base densely setose and hirtellous, margins brown setose; auricles absent; oral setae absent or rarely weakly developed; ligule arcuate, ca. 1 mm, ciliate;
blade persistent, erect, narrowly triangular or triangular-lanceolate, faintly crinkled, base nearly as broad or slightly narrower than apex of culm sheath. Leaves 3–5 per ultimate branch; sheath glabrous; auricles and oral setae absent; ligule 2–2.5 mm; blade lanceolate or linear-lanceolate, 9–17 × 1–2 cm, glabrous. New shoots May.
分类文献
斗竹(南京林产工业学院学报)
Oligostachyum spongiosum (C. D. Chu et C. S. Chao) G. H. Ye et Z. P. Wang, comb. nov. ——Arundinaria spongiosa C. D. Chu et C. S. Chao in Journ. Nanjing Techn. Coll. For. Prod. 1981(3): 33. f. 1. 1981; 广西竹种及其栽培110页. 图59. 1987.
斗竹生长环境
多生于山区阔叶林下或林缘。
斗竹分布范围
广西,在融水县(模式标本产地)分布较广。
辨析
本种的营养器官在诸多主要特征方面与凤竹Oligostachyum hupehense (J. L. Lu)Z. P. Wang et G. H. Yu很相似,故组合到本属中。