灰岩葶藶
| 灰岩葶藶 |
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中文學名:灰岩葶藶 拉丁學名:Draba sikkimensis (Hook.f. & T. Anderson) Pohle 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 種:灰岩葶藶 命名者及年代:Pohle,1926 |
灰岩葶藶（huī yán tíng lì，學名：Draba calcicola）為十字花科葶藶屬的植物。產雲南中甸哈巴雪山。生於峭壁，海拔3400米。 [1]
目錄
灰岩葶藶形態特徵
多年生草本，高約20厘米。莖直立，被單毛、叉狀毛和分枝毛，毛灰白色。
基生葉蓮座狀叢生，長橢圓形或倒卵狀楔形，頂端鈍，基部縮窄，近於無柄，全緣；莖生葉長橢圓形或長卵形，全緣或每邊有細齒，基部擴大，抱莖；葉都被單毛、星狀毛和分枝毛。
總狀花序有花8-35朵，下面數花有苞片；小花梗長2-8毫米；萼片長3-4毫米；花瓣黃色，倒卵楔形，長5-6毫米，頂端微凹；雄蕊花絲擴大；雌蕊窄瓶狀。
短角果長橢圓形或長卵形，有單毛、叉狀毛，有時無毛；花柱長1.5-1.8毫米。花果期8月。 [2]
Draba calcicola O. E. Schulz in Anzeiger Akad. Wien n. 12: 2. 1926; O. E. Schulz in Engl. Pflanzenr. 89 (4. 105): 183. 1927——D. aprica O. E. Schulz, l. c. 373. 1927.
Herbs perennial, 7-45 cm tall, cespitose, canescent at least basally. Caudex branched. Stems erect, much branched above, densely pubescent with a mixture of simple and sessile stellate trichomes, apically tomentose with appressed stellate ones rarely with fewer simple trichomes. Basal leaves rosulate, sessile, oblong-linear to narrowly oblanceolate, 3-6 cm × 2-4 mm, abaxially densely pubescent with subsessile, 5-8-rayed stellate trichomes, adaxially with a mixture of primarily simple trichomes and fewer stellate ones, rarely exclusively simple, base attenuate, margin entire, apex obtuse. Cauline leaves 3-20, sessile; leaf blade ovate, oblong, or lanceolate, 1-5 cm × 3-7 mm, pubescent as basal leaves, base auriculate or amplexicaul, margin entire, apex obtuse. Racemes (20-)30-90-flowered, ebracteate, elongated considerably in fruit. Fruiting pedicels 3-15 mm, divaricate, straight or slightly curved, glabrous adaxially, pubescent abaxially with stellate trichomes. Sepals oblong or ovate, (2-)2.5-3.5 × 1-1.5 mm, ascending, abaxially sparsely pilose with primarily simple trichomes, base of lateral pair subsaccate, margin membranous. Petals yellow, obovate, (4.5-)5-7 × 2.5-4 mm, apex emarginate; claw 1-2 mm. Filaments 1.5-4 mm; anthers ovate, 0.4-0.6 mm. Ovules 6-12 per ovary. Fruit oblong to linear-elliptic, 4-10 × 2-4 mm, latiseptate, not twisted; valves densely pilose with simple, forked, or stellate trichomes, sometimes sparsely pilose only near fruit base; style 0.5-1.5 mm. Seeds brown, ovate, 1.2-1.5 × 0.8-1 mm. Fl. and fr. Jun-Aug.
灰岩葶藶生長環境
灰岩葶藶生長於海拔3400米的峭壁。