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 巨腺棋子豆

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中文學名:巨腺棋子豆

界:植物界

科:豆科

屬:猴耳環屬

巨腺棋子豆((ju xian qí zǐ dòu),學名:Archidendron xichouense (C. Chen & H. Sun) X. Y. Zhu,異名:Cylindrokelupha xichouensis ,是豆科猴耳環屬下的一個種。喬木,8-9米高,二回羽狀複葉,羽片1對;小葉3對,對生或近對生,橢圓形,披針形或倒卵形;花4-5朵組成頭狀花序,頭狀花序的梗長1-1.5厘米,再排成長達20厘米的腋生圓錐花序;莢果勁直,圓柱形,種子達7顆,兩端的陀螺形,中部的棋子形。 [1]

目錄

形態特徵

喬木,8-9米高,小枝圓柱形,棕色或微紅,無毛,具下部彎曲之葉痕。二回羽狀複葉,羽片1對;總葉柄長2-6厘米,頂端或上部及第一或第二對小葉着生處具扁平、圓形腺體;

羽片軸長6-11厘米;小葉3對,對生或近對生,橢圓形,披針形或倒卵形,長5-14(-20)厘米,寬3-5(-10)厘米,頂端漸尖,基部楔形或急尖,二側對稱或不對稱;側脈3-4對,顯著;

小葉柄長4毫米。花4-5朵組成頭狀花序,頭狀花序的梗長1-1.5厘米,再排成長達20厘米的腋生圓錐花序;花蕾卵狀圓柱形,長8-9毫米;花萼壺形或杯狀,長4.5-7毫米,無毛,萼齒不明顯;

花冠漏斗狀或鍾狀,長(9-)12-15毫米,花冠管無毛,裂片狹,卵形或橢圓形,長4-5毫米,頂端及背部被絹毛,雄蕊管較花冠管短;子房無毛,子房柄長6-8毫米。

莢果勁直,圓柱形,長10-20厘米,寬3-3.5厘米,果瓣革質,棕色;種子達7顆,兩端的陀螺形,高達2.5厘米,寬2.5厘米,中部的棋子形,高約2厘米,寬達3.5厘米,種皮脆殼質,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.

產地生境

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

參考來源

  1. 巨腺棋子豆, 植物智, 2020-01-18