圓枝子楝樹檢視原始碼討論檢視歷史
圓枝子楝樹 |
中文學名:圓枝子楝樹 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:桃金娘目 科:桃金娘科 亞 科:桃金娘亞科 族:桃金娘族 種:圓枝子楝樹 |
圓枝子楝樹(yuán zhī zǐ liàn shù),學名 Decaspermum teretis Craven,喬木,對30米高。 圓柱狀的小枝,被絨毛的淡灰棕色。 葉柄6-10毫米,被絨毛; 葉片橢圓形到倒卵形, 7-8 * 2.5-3.7 厘米,革質,黃綠色乾燥時, 正面深綠色和稍發亮乾燥時, 最初兩面短柔毛但是後脫落, 次脈12-15在中脈兩邊各, 花序在頂生葉的腋,聚傘狀,產於 海南南部。 [1]
形態特徵
喬木,對30米高。 圓柱狀的小枝,被絨毛的淡灰棕色。 葉柄6-10毫米,被絨毛; 葉片橢圓形到倒卵形, 7-8 * 2.5-3.7 厘米,革質,黃綠色乾燥時;
正面深綠色和稍發亮乾燥時, 最初兩面短柔毛但是後脫落, 次脈12-15在中脈兩邊各, 花序在頂生葉的腋,聚傘狀,2.5-4厘米,3-8花;
苞片葉狀,長方形, 10-15 * 5-8 毫米直徑長約開花1.5厘米; 披針形的小苞片,長約3毫米,短柔毛。倒卵球形的Hypanthium,直徑約2.5毫米, 被絨毛。
萼裂片5,近圓形,長約2.5毫米,先端圓形。 花瓣5,白色,,長約6毫米,具腺,先端圓形。 雄蕊紅色,長於花瓣; 花絲短柔毛。 子房11-或室。
花柱與雄蕊等長; 柱頭膨大。 近球形的果,直徑約1厘米約5直徑約1厘米。11-或12棱槽,短柔毛,11-或12室。花期7月。
Trees, to 30 m tall. Branchlets terete, grayish brown tomentose. Petiole 6-10 mm, tomentose; leaf blade elliptic to obovate, 7-8 × 2.5-3.7 cm, leathery, abaxially yellowish green when dry, adaxially dark green and slightly shiny when dry, both surfaces at first pubescent but glabrescent, secondary veins 12-15 on each side of midvein, at an angle of ca. 75° from midvein, and obscure, intramarginal veins ca. 1 mm from margin, base cuneate, apex acute.
Inflorescences in axil of terminal leaves, cymose, 2.5-4 cm, 3-8-flowered; bracts leaflike, oblong, 10-15 × 5-8 mm. Flowers ca. 1.5 cm in diam.; bracteoles lanceolate, ca. 3 mm, pubescent.
Hypanthium obovoid, ca. 2.5 mm in diam., tomentose. Calyx lobes 5, suborbicular, ca. 2.5 mm, apex rounded. Petals 5, white, obovate, ca. 6 mm, glandular, apex rounded. Stamens red, longer than petals; filaments pubescent.
Ovary 11- or 12-loculed. Style as long as stamens; stigma expanded. Fruit subglobose, ca. 1 cm in diam., 11- or 12-furrowed, pubescent, 11- or 12-loculed. Fl. Jul.
產地生境
● S Hainan. ● 海南南部
"Pyrenocarpa teretis" (Hung T. Chang & R. H. Miao, Acta Sci. Nat. Univ. Sunyatseni 1975: 64. 1975) belongs here but was not validly published because the genus name "Pyrenocarpa" was not validly published (see comment following genus description above). Pyrenocarpa teretis.