假稻檢視原始碼討論檢視歷史
假稻 |
百合超目 Lilianae 禾本目 Poales 禾本科 Poaceae 假稻屬 Leymus 假稻Leersia japonica (Makino) Honda |
假稻(jiǎ dào),學名 Leersia japonica (Makino) Honda,異名:Leersia sinensis Homalocenchrus japonicus ,多年生。稈下部伏臥地面,節生多分枝的鬚根,上部向上斜升,高60-80厘米,節密生倒毛。葉鞘短於節間,微粗糙;葉舌長1-3毫米,基部兩側下延與葉鞘連合;葉片長6-15厘米,寬4-8毫米,粗糙或下面平滑。圓錐花序長9-12厘米,分枝平滑,產江蘇、浙江、湖南、湖北、四川、貴州、廣西、河南、河北。生於池塘、水田、溪溝湖旁水濕地。 [1]
形態特徵
多年生。稈下部伏臥地面,節生多分枝的鬚根,上部向上斜升,高60-80厘米,節密生倒毛。葉鞘短於節間,微粗糙;葉舌長1-3毫米,基部兩側下延與葉鞘連合;
葉片長6-15厘米,寬4-8毫米,粗糙或下面平滑。圓錐花序長9-12厘米,分枝平滑,直立或斜升,有角棱,稍壓扁;小穗長5-6毫米,帶紫色;外稃具5脈,脊具刺毛;
內稃具3脈,中脈生刺毛;雄蕊6枚,花葯長3毫米。花果期夏秋季。染色體2n=96(Hirayoshi 1937)。
Leersia japonica (Makino ex Honda) Honda 假稻 jia dao Homalocenchrus japonicus Makino ex Honda, Bot. Mag. (Tokyo) 39: 37. 1925; Leersia sinensis K. S. Hao.
Perennial, loosely tufted. Culms decumbent, rooting at lower nodes, upper part geniculately ascending, 60–80 cm tall, nodes densely retrorsely hispid. Leaf sheaths shorter than internodes, scabrid; leaf blades flat, 6–15 × 0.4–0.8 cm, scabrid or abaxial surface smooth, base contracted, apex sharply acute; ligule 2–3 mm, truncate.
Panicle elliptic to ovate in outline, 9–12 cm, exserted; branches inserted singly, stiffly ascending or spreading, 4–7 cm, unbranched, thick, slightly flattened, smooth, clothed to near base with approximate or slightly overlapping spikelets.
Spikelets lanceolate-oblong, 4.5–6 mm, pale green tinged brownish red; lemma pectinate-hispid on keel only, surface smooth, margins minutely spinulose, apex contracted into a narrowly obtuse beak. Stamens 6, anthers 2.5–3 mm. Fl. and fr. summer and autumn. 2n = 96.
分類文獻
假稻(鍾觀光擬)圖版2:1,1a
Leersia japonica (Makino) Honda in Journ. Fac. Sci. Univ. Tokyo Sect. III. Bot. 3: 7. 1930;中國主要植物圖說·禾本科631, 圖569. 1959;華東禾本科植物志175. 1962;江蘇植物志(上): 213, 圖363. 1977.——Leersia japoinca Makino in Bot. Mag Tokyo 4: 48. 1892, nom. nud. ——Homalocenchrus japanicus(Makino) Honda in Bot. Mag.Tokyo 39: 37. 1925.——Leersia sinensis Hao in Repert. Sp. Nov. Fedde. 42: 83. 1937.
產地生境
產江蘇、浙江、湖南、湖北、四川、貴州、廣西、河南、河北。生於池塘、水田、溪溝湖旁水濕地。分布於日本。模式標本采自日本。