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 巨腺棋子豆

来自 植物智 的图片

中文学名:巨腺棋子豆

界:植物界

科:豆科

属:猴耳环属

巨腺棋子豆((ju xian qí zǐ dòu),学名:Archidendron xichouense (C. Chen & H. Sun) X. Y. Zhu,异名:Cylindrokelupha xichouensis ,是豆科猴耳环属下的一个种。乔木,8-9米高,二回羽状复叶,羽片1对;小叶3对,对生或近对生,椭圆形,披针形或倒卵形;花4-5朵组成头状花序,头状花序的梗长1-1.5厘米,再排成长达20厘米的腋生圆锥花序;荚果劲直,圆柱形,种子达7颗,两端的陀螺形,中部的棋子形。 [1]

形态特征

乔木,8-9米高,小枝圆柱形,棕色或微红,无毛,具下部弯曲之叶痕。二回羽状复叶,羽片1对;总叶柄长2-6厘米,顶端或上部及第一或第二对小叶着生处具扁平、圆形腺体;

羽片轴长6-11厘米;小叶3对,对生或近对生,椭圆形,披针形或倒卵形,长5-14(-20)厘米,宽3-5(-10)厘米,顶端渐尖,基部楔形或急尖,二侧对称或不对称;侧脉3-4对,显著;

小叶柄长4毫米。花4-5朵组成头状花序,头状花序的梗长1-1.5厘米,再排成长达20厘米的腋生圆锥花序;花蕾卵状圆柱形,长8-9毫米;花萼壶形或杯状,长4.5-7毫米,无毛,萼齿不明显;

花冠漏斗状或钟状,长(9-)12-15毫米,花冠管无毛,裂片狭,卵形或椭圆形,长4-5毫米,顶端及背部被绢毛,雄蕊管较花冠管短;子房无毛,子房柄长6-8毫米。

荚果劲直,圆柱形,长10-20厘米,宽3-3.5厘米,果瓣革质,棕色;种子达7颗,两端的陀螺形,高达2.5厘米,宽2.5厘米,中部的棋子形,高约2厘米,宽达3.5厘米,种皮脆壳质,棕色。

Trees, 8-9 m tall. Branchlets brown or reddish, cylindric, glabrous, with curved leaf scars. Leaf petiole 2-6 cm; petiolar gland circular, less than 0.5 mm high, 0.5-0.7 mm in diam., at upper portion of petiole and insertion of leaflets;

rachis of pinnae 6-11 cm; pinnae 1 pair; petiolules ca. 4 mm; leaflets 3 pairs, opposite or subopposite, elliptic or lanceolate, 5-14(-20) × 3-5(-10) cm, both surfaces glabrous, lateral veins 3 or 4 pairs, conspicuous, base cuneate or acute, symmetric or not, apex acuminate.

Heads 6-8-flowered, arranged in axillary pani-cles to 20 cm; peduncles 1-1.5 cm. Calyx urceolate or cup-shaped, 4.5-7 mm, glabrous; teeth inconspicuous. Corolla fun-nel-shaped or campanulate, (0.9-)1.2-1.5 cm; lobes narrowly ovate or elliptic, 4-5 mm, abaxially and apically sericeous.

Staminal tube equaling corolla tube. Ovary glabrous; stipe 6-8 mm. Legume straight, cylindric, 10-20 × 3-3.5 cm; valves brown, leathery. Seeds to 7, ca. 2.5 × 2.5 cm, both ends turbi-nate; testa brown, crustaceous.

产地生境

Dense forests of valleys; 300-700 m. Guangxi, Yunnan [Vietnam].

参考来源

  1. 巨腺棋子豆, 植物智, 2020-01-18