密花樫木檢視原始碼討論檢視歷史
密花樫木 |
中文學名:密花樫木 拉丁學名:Dysoxylum densiflorum (Bl.) Miq. 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:芸香目 亞 目:芸香亞目 科:楝科 亞 科:楝亞科 屬:樫木屬 種:密花樫木 |
密花樫木,學名 Dysoxylum densiflorum (Bl.) Miq.,楝科樫木屬植物。產雲南西雙版納(勐臘、景洪)。 [1]
密花樫木形態特徵
常綠喬木,高可達25米;樹皮灰黃色,小塊狀剝落,內皮淡黃色。一年生小枝被柔毛,葉互生,長35-46厘米,葉軸密被黃色柔毛;小葉7-15,互生或近對生,紙質,長圓形,長9-16厘米,寬3-6厘米,先端漸尖或短漸尖,基部偏斜,側脈10-14對,頂生小葉倒卵狀長圓形,小葉葉面僅沿中脈有毛,背面沿脈密被黃色柔毛;小葉柄長4-6毫米,密被柔毛。花組成總狀花序,着生於二年生或多年生的老枝上;花序單生或2-3(-10)個簇生,長5-9厘米,軸上密被柔毛。花梗長2-4毫米,密被柔毛。
花淡黃色,長8-10毫米;萼杯狀,高3-4毫米,裂片4,三角形,外面被短柔毛,內面無毛;花瓣4,長圓形,長6-8毫米,寬約2毫米,外面被疏短柔毛,內面無毛;雄蕊管長6-8毫米,徑約3毫米,內外兩面均被疏柔毛,先端具8個小裂片,每裂片端部又淺裂為2齒,花葯8枚,略低於雄蕊管緣;花盤管狀或呈壇狀,高約2毫米,無毛,上面波狀;子房內藏於花盤內,密被粗毛,4室,花柱長8毫米,被疏長柔毛,柱頭盾形。
蒴果黃綠色,橢圓形或倒卵形,果皮密被黃色粉狀短毛;近軸一側常稍壓扁,果長4-6厘米,直徑2.5-4厘米。種子鮮紅色,具僧帽狀橙色假種皮。花期4月及9月,果期4-5月及10-11月。
Dysoxylum densiflorum (Bl.) Miq. Ann. Mus. Bot. Lugd. Bot. 4: 9. 1868; Koord. et Valeton in Bijdr. Booms. Java 3: 41. 1896, et in Atlas Baunarter fig. 98. 1913; Backer in Fl. Java 2:122. 1965; 鄒壽青, 雲南植物研究11(2): 155-1989; ——Epicharis densiflora Bl. Bijdr. 167. 1825.
Trees to 25 m tall, evergreen. Bark exfoliating, endodermis yellowish. Young shoots pubescent. Leaves alternate, 35-46 cm, odd-pinnate; rachis densely yellow pubescent; leaflets 7-15, opposite to subopposite; petiolules 4-6 mm, densely pubescent; leaflet blades oblong but apical one obovate-oblong, 9-16 × 3-6 cm, papery, abaxially densely pubescent along veins, adaxially only on midvein, secondary veins 10-14 on each side of midvein, base oblique, apex acuminate to shortly acuminate. Thyrses on older branches and sometimes axillary, solitary or 2- or 3(-10)-conglomerate, 5-9 cm, rachis densely pubescent. Flowers yellowish, 8-10 mm. Pedicel 2-4 mm, densely pubescent. Calyx cup-shaped, 3-4 mm, 4-lobed; lobes triangular, outside sparsely pubescent, inside glabrous. Petals 4. Staminal tube 6-8 × ca. 2 mm, both surfaces sparsely pubescent, margin 8-lobed, each lobe tip 2-cleft as 2 teeth; anthers 8, slightly included within tube. Disk tubular to urceolate, ca. 2 mm high, glabrous, apex undulate. Ovary included in disk, densely covered with thick trichomes, 4-locular; style ca. 8 mm, sparsely villous; stigma peltate. Capsule yellowish green, ellipsoid to obovoid, 4-6 × 2.5-4 cm; pericarp densely covered with pulverulent yellow trichomes. Seeds bright red, with a salmon-colored aril. Fl. Apr and Sep, fr. Apr-May and Oct-Nov.
密花樫木生長環境
生長於海拔520-800米的濕性熱帶季節性谷邊、河邊坡地的雨林中。[2]
密花樫木分布範圍
產自雲南西雙版納(勐臘、景洪);分布於印度尼西亞、馬來西亞。