山景葶藶
| 山景葶藶 |
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中文學名:山景葶藶 拉丁學名:Draba oreodoxa 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:罌粟目 亞 目:白花菜亞目 科:十字花科 族:葶藶族 屬:葶藶屬 組:多葉葶藶組 |
山景葶藶（學名：Draba oreodoxa）為十字花科葶藶屬下的一個種。多年生草本。產雲南麗江至中甸（哈巴雪山）。生于山頂岩石上，海拔2400-4600米。 [1]
目錄
山景葶藶形態特徵
山景葶藶 多年生草本。高5-10厘米，形成稀疏草叢。根莖多分枝，長達3-10厘米，直徑1-1.5毫米，下部宿存披針形枯葉，上部有蓮座狀葉。
莖單一，混生單毛、有柄叉狀毛、星狀短柔毛成氈毛狀，有3-6葉。葉均為薄革質，基生葉窄倒卵狀楔形或長橢圓狀匙形，長7-10毫米，頂端圓鈍，基部縮窄成短而寬的柄，全緣或偶有微齒；莖生葉卵形或窄卵狀披針形，頂端鈍，全緣或有2-4細齒，無柄，密生灰白色長單毛、叉狀毛及星狀毛。
總狀花序有花10-15朵，密集成傘房狀，下有苞片，花梗長2-7毫米；萼片倒卵形或卵形，長2-3毫米，頂端圓鈍，綠色，邊緣淡黃色，有毛；花瓣金黃色，廣倒卵形，長6-7毫米，頂端微缺；雄蕊長約2.5毫米，花絲基部擴大，花葯卵形，長約0.5毫米；雌蕊無毛。
短角果卵圓形，長約4毫米，寬約3毫米，柱頭長約1毫米。花期5-6月。 [2]
Draba oreodoxa W. W. Smith in Not. Roy. Rot. Gard. Edinb. n. 55: 209. 1919; O. E. Schulz in Engl. Pflanzenr. 89 (4. 105): 178. 1927.
Herbs perennial, 5-24 cm tall, cespitose. Caudex few to many branched, with petiolar remains of previous years, ultimate branches terminated in rosettes. Stems erect to decumbent, simple, sparsely to densely pubescent with a mixture of simple, forked, and stellate trichomes, apically tomentose with appressed stellate ones. Basal leaves rosulate, persistent; petiole to 1 cm, base often persistent; leaf blade obovate, spatulate, to narrowly oblanceolate, 0.4-2 cm × (2-)3-7 mm, abaxially pubescent with subsessile, 4(or 5)-rayed, soft, fine stellate trichomes, adaxially with a mixture of primarily simple trichomes with fewer stellate and forked ones, sometimes trichomes restricted to leaf margins and midvein, base cuneate, margin entire or denticulate, apex obtuse or rounded. Cauline leaves 3-7, sessile; leaf blade narrowly oblong, oblanceolate, or ovate, 0.5-2 cm × (1.5-)2.5-5(-7) mm, pubescent as basal leaves, base obtuse, not auriculate, margin entire or denticulate, apex obtuse. Racemes 12-35-flowered, bracteate basally to beyond middle, elongated in fruit. Fruiting pedicels (0.4-)0.6-1.5 cm, divaricate, straight or slightly curved, glabrous adaxially, pubescent abaxially with stellate trichomes. Sepals ovate, 2-3 × 1-1.7 mm, ascending, abaxially sparsely pilose with primarily simple trichomes, base of lateral pair subsaccate, margin membranous. Petals yellow, obovate, (3.5-)4-6(-7) × 2-3(-4) mm, apex emarginate; claw to 1 mm. Filaments 1.5-3 mm; anthers ovate, 0.4-0.6 mm. Ovules (5-)8-12 per ovary. Fruit ovate, 4-7 × 3-5 mm, latiseptate, sometimes slightly twisted; valves glabrous; style ca. 0.5 mm. Seeds brown, ovate, 1.3-1.8 × 1-1.3 mm. Fl. and fr. Jun-Aug.
山景葶藶生長環境
生長於海拔2400-4600米的山頂岩石上。