海南柳叶箬Isachne hainanensis Keng f.
海南柳叶箬Isachne hainanensis Keng f.
16. 海南柳叶箬（植物分类学报）图版58：6-11
Isachne hainanensis Keng f. in Acta Phytotax. Sin. 10 (1): 23, pl. 2. 1965.
一年生。秆纤细柔弱，节上生根，匍匐地面，直立部分高8-15厘米。叶鞘较节间短，长仅3-5毫米，疏生白色疣基细硬毛；节上、鞘口及其边缘具较密的茸毛；无叶舌，叶片卵状椭圆形，长8-15毫米，宽3-6毫米，质薄而柔软，顶端短尖，基部圆形，两面疏生白色细柔毛或无毛，叶缘不增厚，疏生疣基长毛，尤以基部较密。圆锥花序卵形，长2-3.5厘米，宽5-10毫米，常伸出或基部为顶端叶鞘所包，每节生出1-2枝，分枝细弱，斜升，无腺斑；小穗淡绿色或带紫色，长约1.8毫米；颖长椭圆形，顶端钝圆，等长或略短于小穗，具3-5脉，无毛；第一小花为雄性，长圆形，长约1.8毫米，稃体质薄而软，淡绿色；花药淡棕色，长约1.3毫米；第二小花两性，呈半球形，长约为第一小花之半，基部具明显的小花轴，长约0.4毫米，稃体软骨质，黄白色，表面密生细小的毛茸；鳞被膜质，几呈方形，顶端浅裂；子房细长，花柱长约0.5毫米，柱头帚状。颖果椭圆形。花果期10-12月。
产广东、海南；生于300-500米的山谷湿地或沼泽地中。模式标本采自崖县。
《Flora of China》 Vol. 22 (2006)
Isachne hainanensis P. C. Keng
海南柳叶箬 hai nan liu ye ruo
Annual. Culms slender, creeping, branching and rooting at lower nodes, 8–15 cm tall. Leaf sheaths shorter than internodes, papillose-hispid, outer margin ciliate; leaf blades ovate-elliptic, thin, 0.8–1.5 × 0.3–0.6 cm, subglabrous or abaxial surface papillose-hispid, base rounded, margins not thickened, ciliate, apex acute; ligule almost absent. Panicle ovate in outline, 2–3.5 cm, eglandular, moderately branched; branches and pedicels slender, pedicels mostly longer than spikelets. Spikelets 1.7–1.8 mm, greenish or purplish green; florets clearly dissimilar; lower floret male, upper floret raised on distinct internode, bisexual; glumes subequaling or shorter than spikelet, elliptic-lanceolate, 5–7-veined, glabrous, apex obtuse; lower lemma herbaceous, elliptic-oblong, dorsally flattened, smooth, glabrous; anthers 1.3–1.5 mm; upper lemma crustaceous, strongly plano-convex, 1/2 length of lower floret, densely pubescent. Fl. and fr. Oct–Dec.
* Valleys, moist places; 300–500 m. Guangdong, Hainan.
This species is very close to Isachne pulchella, but the whole plant is eglandular and has exceptionally small leaf blades and a small upper floret raised on a conspicuous internode. The anthers are also longer than in I. pulchella.
科名：禾本科 Gramineae
属名：柳叶箬属 Isachne
16. 海南柳叶箬（植物分类学报）图版58：6-11
Isachne hainanensis Keng f. in Acta Phytotax. Sin. 10 (1): 23, pl. 2. 1965.
一年生。秆纤细柔弱，节上生根，匍匐地面，直立部分高8-15厘米。叶鞘较节间短，长仅3-5毫米，疏生白色疣基细硬毛；节上、鞘口及其边缘具较密的茸毛；无叶舌，叶片卵状椭圆形，长8-15毫米，宽3-6毫米，质薄而柔软，顶端短尖，基部圆形，两面疏生白色细柔毛或无毛，叶缘不增厚，疏生疣基长毛，尤以基部较密。圆锥花序卵形，长2-3.5厘米，宽5-10毫米，常伸出或基部为顶端叶鞘所包，每节生出1-2枝，分枝细弱，斜升，无腺斑；小穗淡绿色或带紫色，长约1.8毫米；颖长椭圆形，顶端钝圆，等长或略短于小穗，具3-5脉，无毛；第一小花为雄性，长圆形，长约1.8毫米，稃体质薄而软，淡绿色；花药淡棕色，长约1.3毫米；第二小花两性，呈半球形，长约为第一小花之半，基部具明显的小花轴，长约0.4毫米，稃体软骨质，黄白色，表面密生细小的毛茸；鳞被膜质，几呈方形，顶端浅裂；子房细长，花柱长约0.5毫米，柱头帚状。颖果椭圆形。花果期10-12月。
产广东、海南；生于300-500米的山谷湿地或沼泽地中。模式标本采自崖县。
《Flora of China》 Vol. 22 (2006)
Isachne hainanensis P. C. Keng
海南柳叶箬 hai nan liu ye ruo
Annual. Culms slender, creeping, branching and rooting at lower nodes, 8–15 cm tall. Leaf sheaths shorter than internodes, papillose-hispid, outer margin ciliate; leaf blades ovate-elliptic, thin, 0.8–1.5 × 0.3–0.6 cm, subglabrous or abaxial surface papillose-hispid, base rounded, margins not thickened, ciliate, apex acute; ligule almost absent. Panicle ovate in outline, 2–3.5 cm, eglandular, moderately branched; branches and pedicels slender, pedicels mostly longer than spikelets. Spikelets 1.7–1.8 mm, greenish or purplish green; florets clearly dissimilar; lower floret male, upper floret raised on distinct internode, bisexual; glumes subequaling or shorter than spikelet, elliptic-lanceolate, 5–7-veined, glabrous, apex obtuse; lower lemma herbaceous, elliptic-oblong, dorsally flattened, smooth, glabrous; anthers 1.3–1.5 mm; upper lemma crustaceous, strongly plano-convex, 1/2 length of lower floret, densely pubescent. Fl. and fr. Oct–Dec.
* Valleys, moist places; 300–500 m. Guangdong, Hainan.
This species is very close to Isachne pulchella, but the whole plant is eglandular and has exceptionally small leaf blades and a small upper floret raised on a conspicuous internode. The anthers are also longer than in I. pulchella.