房縣柳檢視原始碼討論檢視歷史
房縣柳 |
中文名:房縣柳 學 名:Salix rhoophila Schneid. 界:植物界 門:被子植物門Angiospermae 綱:雙子葉植物綱Dicotyledoneae 目:楊柳目 Salicales 科:楊柳科Salicaceae 屬:柳屬Salix 種:房縣柳 |
房縣柳(fáng xiàn liǔ,學名 Salix rhoophila Schneid.),灌木,高1.2-2.4米。幼枝具長柔毛或疏毛,後無毛。主要產於湖北、四川等省。 [1]
房縣柳形態特徵
灌木,高1.2-2.4米。幼枝具長柔毛或疏毛,後無毛。葉橢圓形至長圓形,長2-4.5厘米,寬1-1.5(2)厘米,最大者長可達8厘米,先端急尖或鈍,基部圓形,全緣,兩面無毛或幼時具毛,稀下面有絨毛;葉柄長4-10毫米,上面具微柔毛。
雄花序圓柱形,長1-1.5厘米,粗約6毫米,有短花序梗或近無梗,基部有2小葉,軸有長柔毛,雄蕊2,花絲基部具長柔毛,花葯黃色;苞片寬卵形,先端圓形或近截形,黃褐色,無毛,長為花絲的1/2-1/3;腹腺寬;
雌花序長1.2-2.5厘米,粗3-(4)毫米,花序梗上具2-3小葉,軸有毛;子房卵形,無毛,無柄,花柱短,2裂,柱頭短,各2裂;
苞片褐色,寬卵圓形,先端鈍,無毛,或外面有毛,腹腺卵形或有四角棱。花期3月,果期4-5月。 [2]
Salix rhoophila Schneid. in Sarg. Pl. Wils. 3: 54. 1916; Hao in Fedde, Rep. Beih. 93: 79. t. 28: 55. 1936.
Shrubs to 2.5 m tall. Branchlets purplish brown or slightly blackish, villous or pilose when young, glabrescent. Petiole 4-10 mm, pilose; leaf blade elliptic to oblong, 2-4.5(-8) × 1-1.5(-2) cm, both surfaces glabrous, or pilose when young, rarely tomentose abaxially, base rounded, margin entire, apex acute or obtuse. Male catkin cylindric, 1-1.5 cm × ca. 6 mm; peduncle short or absent, with 2 leaflets; rachis villous; bracts yellowish brown, broadly ovate, 1/3-1/2 as long as filaments, glabrous, apex rounded or truncate. Male flower: gland adaxial; stamens 2; filaments villous at base; anthers yellow. Female catkin 1.2-2.5 cm × 3(-4) mm; peduncle with 2 or 3 leaflets; rachis pilose; bracts brown, broadly ovate, glabrous, or pilose abaxially, apex obtuse. Female flower: adaxial gland ovate or quadrangular; ovary ovoid, glabrous, sessile; style short, 2-cleft; stigma 2-lobed. Fl. Mar, fr. Apr-May.
房縣柳生長環境
生長於海拔840-2600米的河邊、山坡。