裂舌少穗竹
裂舌少穗竹 |
界:植物界 門:被子植物門 Angiospermae 綱:單子葉植物綱 Monocotyledoneae 目:禾本目 Graminales 科:禾本科 Gramineae 亞科:竹亞科 Bambusoideae 族:北美箭竹族 ARUNDINARIEAE 亞族:北美箭竹亞族 Subtrib. Arundinariinae 屬:少穗竹屬 Oligostachyum |
裂舌少穗竹(liè shé shǎo suì zhú), Oligostachyum bilobum W. T. Lin & Z. J. Feng,稈1-1.5米,在0.8厘米直徑; 節間的8-12厘米; 節隆起,比鞘痕突出的節的脊; 每節intranode 2-3毫米第3 分部。 綠色的竿籜,疏生糙伏毛或者有乳突以下降頭髮,2裂的頂離開; 葉耳無; 口頭的剛毛無的或很少,直立; 葉舌0.5-1毫米; 落葉的葉片,狹線形。 每末級的分枝葉3; 鞘無毛; 葉耳宿存; 口頭的剛毛無的或很少; 葉舌短,具微糙硬毛; [1]
目錄
形態特徵
稈1-1.5米,在0.8厘米直徑; 節間的8-12厘米; 節隆起,比鞘痕突出的節的脊; 每節intranode 2-3毫米第3 分部。 綠色的竿籜,疏生糙伏毛或者有乳突以下降頭髮,2裂的頂離開;
葉耳無; 口頭的剛毛無的或很少,直立; 葉舌0.5-1毫米; 落葉的葉片,狹線形。 每末級的分枝葉3; 鞘無毛; 葉耳宿存; 口頭的剛毛無的或很少;
葉舌短,具微糙硬毛; 葉片線形的到線狀披針形,對約 18 * 0.5-1 厘米,有時寬,兩面無毛。 總狀花序具4或5小穗; 花序梗纖細,無毛; 軸和花梗纖細,無毛;
花梗1-1.5毫米,有時通過一個小,膜的苞被包着。 最初略帶紫色,線狀披針形的小穗,在7厘米; 小花很多; 小穗軸節間的4.5-6毫米,頂纖毛。 穎片2-4,逐漸大,類似於外稃的最上部的一但是小的稍;
大約正面清楚1.5厘米,13-15脈,橫向脈的外稃,先端漸尖,具短尖; 內稃小於外稃,上部纖毛的龍骨的非常,先端鈍或銳尖,超過龍骨;
鱗被3,斜披針形的前面對,5-9脈,具短緣毛的先端。 雄蕊3; 花葯長約4毫米短設計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.
產地生境
- Forested slopes; 500–1500 m. Guangdong.
樹林覆蓋的山坡 500-1500米廣東。