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白虫豆

中文学名:白虫豆

拉丁学名:Cajanus niveus (Benth.)

van der Maesen

界:植物界

科:豆科

属:木豆属

分布区域:产云南南部元江

河谷。缅甸有分布。

科拉丁名:Leguminosae

属拉丁名:Cajanus

白虫豆(bái chóng dòu,学名:Cajanus niveus (Benth.) van der Maesen),直立小灌木。产云南南部元江河谷。常生于海拔450-1 200米石山阳坡上。缅甸有分布。 (概述图来自:中国自然标本馆 ) [1]

目录

白虫豆形态特征

白虫豆, 直立小灌木,高约1米。茎有纵纹,全株密被灰色至灰白色短绒毛。

叶具羽状3小叶;叶柄长1.5-3厘米;托叶小,早落;小叶革质,下面有腺状斑点,顶生小叶倒卵形,长2.5-3.8厘米,上面略被灰色短绒毛,下面密被灰白色短绒毛;基出脉3条,侧脉每边3-5条,两面略明显;小托叶缺;

小叶柄长2-5毫米,密被灰白色短绒毛,侧生小叶稍小,斜椭圆形,两端斜圆形,干后上面带黑色,下面灰白色。

总状花序腋生,少花。荚果倒卵状椭圆形,扁平,长3-4.5厘米,中部以上逐步扩大,近顶端最宽处约1.5厘米,先端具弯喙,果瓣于种子间具明显横缢线,密被灰白色贴伏短绒毛;

种子4-8颗,椭圆形,长约5毫米,宽约4毫米,有淡褐色斑点,先端圆形,基部有肥厚的种阜。果期8月。[2]

Cajanus niveus (Benth.) van der Maesen in Agr. Univ. Wageningen papers 85-4: 157. 1986.——Cajanus niveus Grah. ex Wall. nom. mud. 1831.——Atylosia nivea Benth. in Miq. Pl. Jungh. 1: 243. 1852; Baker in Hook. f. Fl. Brit. Ind. 2:214 1876.——Cantharospermum niveum (Benth.)Raiz. in Mooney, Suppl. Bot. Bihar & Orissa 53. 1950.

Atylosia nivea Wallich ex Bentham in Miquel, Pl. Jungh. 243. 1852; Cantharospermum niveum (Wallich ex Bentham) Raizada.

Subshrubs, erect, ca. 1 m tall. Stems pubescent. Leaves pinnately 3-foliolate; stipules small, deciduous; petiole 1.5-3 cm, densely tomentose; stipels absent; petiolules 2-5 mm, densely tomentose; leaflets leathery, with glandular spot below; terminal leaflet obovate, 2.5-3.8 cm, adaxial surface pubescent, basal veins 3, lateral veins 3-5 on each side, slightly obvious on both surfaces; lateral leaflets slightly smaller, obliquely elliptic, with black spot after drying adaxially, with fine downy hairs on abaxial surface. Raceme axillary, 3-6 cm, with a few flowers; peduncle 0.6-1.2 cm; bracts ovate. Calyx campanulate; lobes triangular, shorter than tube. Corolla yellow, 4-5 × as long as calyx; standard obovate, base auriculate; wings auriculate; keels with auricles, apex slightly inflexed. Ovary densely hairy. Leg-ume obovate-elliptic, compressed, 3-4.5 cm, to 1.5 cm wide near top, densely pubescent, legume valve with obvious trans-verse constriction between seeds, apex with curved beak. Seeds 4-8, with light gray spot, ellipsoidal, ca. 5 × 4 mm, apex rounded; strophiole succulent at base. Fl. and fr. Aug-Oct.

白虫豆生长环境

常生长于海拔450-1 200米石山阳坡上。

白虫豆分布范围

产自云南南部元江河谷。缅甸有分布。[3]

参考来源

  1. 白虫豆, 植物智, 2020-01-18
  2. 《中国植物志》 第41卷 (1995) >> 301页 PDF >> 白虫豆 Cajanus niveus
  3. 白虫豆 Cajanus niveus - 植物标本馆(KUN)官方网站 2015年8月7日 - 白虫豆Cajanus niveus 编辑Cajanus niveus (Wall. ex Benth.) Maesen in Agricultural University Wageningen Papers 85(4): 157. 1986[1985].种间区...