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裂舌少穗竹 |
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 |
裂舌少穗竹(liè shé shǎo suì zhú), Oligostachyum bilobum W. T. Lin & Z. J. Feng,秆1-1.5米,在0.8厘米直径; 节间的8-12厘米; 节隆起,比鞘痕突出的节的脊; 每节intranode 2-3毫米第3 分部。 绿色的竿箨,疏生糙伏毛或者有乳突以下降头发,2裂的顶离开; 叶耳无; 口头的刚毛无的或很少,直立; 叶舌0.5-1毫米; 落叶的叶片,狭线形。 每末级的分枝叶3; 鞘无毛; 叶耳宿存; 口头的刚毛无的或很少; 叶舌短,具微糙硬毛; [1]
形态特征
秆1-1.5米,在0.8厘米直径; 节间的8-12厘米; 节隆起,比鞘痕突出的节的脊; 每节intranode 2-3毫米第3 分部。 绿色的竿箨,疏生糙伏毛或者有乳突以下降头发,2裂的顶离开;
叶耳无; 口头的刚毛无的或很少,直立; 叶舌0.5-1毫米; 落叶的叶片,狭线形。 每末级的分枝叶3; 鞘无毛; 叶耳宿存; 口头的刚毛无的或很少;
叶舌短,具微糙硬毛; 叶片线形的到线状披针形,对约 18 * 0.5-1 厘米,有时宽,两面无毛。 总状花序具4或5小穗; 花序梗纤细,无毛; 轴和花梗纤细,无毛;
花梗1-1.5毫米,有时通过一个小,膜的苞被包着。 最初略带紫色,线状披针形的小穗,在7厘米; 小花很多; 小穗轴节间的4.5-6毫米,顶纤毛。 颖片2-4,逐渐大,类似于外稃的最上部的一但是小的稍;
大约正面清楚1.5厘米,13-15脉,横向脉的外稃,先端渐尖,具短尖; 内稃小于外稃,上部纤毛的龙骨的非常,先端钝或锐尖,超过龙骨;
鳞被3,斜披针形的前面对,5-9脉,具短缘毛的先端。 雄蕊3; 花药长约4毫米短设计3裂。 新嫩枝和果期4月5月。
Oligostachyum bilobum W. T. Lin & Z. J. Feng裂舌少穗竹 lie she shao sui zhu
Culms 1–1.5 m, to 0.8 cm in diam.; internodes 8–12 cm; nodes elevated, nodal ridge more prominent than sheath scar; intranode 2–3 mm. Branches 3 per node. Culm sheath green, sparsely strigose or with papillae left by fallen hairs, apex 2-lobed; auricles absent; oral setae absent or few, erect; ligule 0.5–1 mm; blade deciduous, narrowly linear.
Leaves 3 per ultimate branch; sheath glabrous; auricles present; oral setae absent or few; ligule short, hirtellous; blade linear to linear-lanceolate, to ca. 18 × 0.5–1 cm, sometimes broader, both surfaces glabrous.
Racemes with 4 or 5 spikelets; peduncle slender, glabrous; axis and pedicels slender, glabrous; pedicels 1–1.5 mm, sometimes subtended by a small, membranous bract. Spikelets initially purplish, linear-lanceolate, to 7 cm; florets many; rachilla internodes 4.5–6 mm, apex ciliate.
Glumes 2–4, gradually larger, uppermost one similar to lemma but slightly smaller; lemma ca. 1.5 cm, 13–15-veined, transverse veins adaxially distinct, apex acuminate, mucronate; palea much smaller than lemma, keels distally ciliate, apex obtuse or acute, exceeding keels; lodicules 3, anterior pair obliquely lanceolate, 5–9-veined, apex ciliolate. Stamens 3; anthers ca. 4 mm. Style shortly 3-fid. New shoots and fr. Apr–May.
产地生境
- Forested slopes; 500–1500 m. Guangdong.
树林覆盖的山坡 500-1500米广东。