苞序葶藶檢視原始碼討論檢視歷史
| 苞序葶藶 |
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中文學名:苞序葶藶 拉丁學名:Draba ladyginii 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 組:葶藶組 |
苞序葶藶（學名：Draba ladyginii），為十字花科葶藶屬下的一個植物種。多年生叢生草本。產自內蒙古、河北、山西、湖北、陝西、甘肅、寧夏、青海、新疆、四川、雲南、西藏。 [1]
苞序葶藶簡介
苞序葶藶屬多年生叢生草本，基生葉蓮座狀，莖生時較小。總狀花序，花白色。生於海拔2000-3600米的山坡岩石上或冷杉林下。植株低矮且緊湊，耐貧瘠，可引種至岩石園中 。種子油可作工業用油 。
苞序葶藶形態特徵
多年生叢生草本，高10-30厘米。根莖分枝多，基部宿存纖維狀枯葉，上部簇生蓮座狀葉。
莖直立，單一或在上部分枝，密被叉狀毛、星狀毛或單毛。基生葉橢圓狀披針形，長1-1.5厘米，寬2-2.7毫米，頂端鈍或漸尖，基部漸窄，全緣或每緣各有1鋸齒，密生單毛和星狀毛；莖生葉卵形或長卵形，長4-16毫米，寬3-4毫米，頂端急尖，基部寬，無柄，每緣各有1-3鋸齒，有單毛、星狀毛或分枝毛。
總狀花序下部數花具葉狀苞片；花瓣白色或淡黃色，倒卵形，長約3毫米，基部楔形，頂端微凹；雄蕊長1.8-2毫米；子房條形，無毛。
短角果條形，長7-12毫米，寬約1.2毫米，無毛，直或扭轉，果梗與果序軸成直角向上開展；花柱長0.5-1毫米；種子褐色，橢圓形。花期5-6月，果期7-8月 。 [2]
Draba ladyginii Pohle in Bull. Jard. Bot. Petersb. 14: 472. 1914 et in Fedde, Repert. Beih. 32: 170. 1925; O. E. Schulz in Engl. Pflanzenr. 89 (4. 105): 301. 1927; 中國高等植物圖鑑2: 50. 圖1830. 1972; 秦嶺植物志1 (2): 294. 圖340. 1974. ——D. incana L. var. microphylla W. W. Smith in Not. Roy. Bot. Gard. Edinb. n. 55: 206. 1919; 湖北植物志2: 33. 1980.
Herbs perennial, (7-)15-45(-60) cm tall, cespitose. Caudex slender, few branched, ultimate branches terminated in rosettes, covered with petiolar remains of previous years. Stems erect, simple or rarely branched above middle, sparsely to densely pubescent with subsessile stellate trichomes, often glabrescent distally. Basal leaves rosulate, persistent; petiole 5-10(-15) mm, sometimes undifferentiated; leaf blade elliptic, oblong, or lanceolate, (0.3-)1-2.5(-4) cm × (1-)2-7(-10) mm, abaxially pubescent with sessile or short-stalked, 4-rayed stellate trichomes 1 or 2 rays of which often branched, adaxially pubescent with similar stellate trichomes or with a mixture of stellate and simple ones, base attenuate to cuneate, margin entire or denticulate, apex acute. Cauline leaves (4-)6-19(-26), sessile; leaf blade ovate, oblong, or elliptic, 0.4-2.5(-4) cm × 1.5-7(-15) mm, pubescent as basal leaves or adaxially strigose with simple trichomes, base cuneate to obtuse, margin entire or 1-4(-7)-toothed on each side, apex acute. Racemes (8-)14-35(-45)-flowered, bracteate basally, not elongated in fruit. Fruiting pedicels 2-10(-12) mm, divaricate, straight, glabrous or pubescent all around with subsessile, forked or stellate trichomes sometimes mixed with simple ones. Sepals oblong or ovate, 1-1.5 × 0.5-0.6 mm, erect, abaxially pilose with simple trichomes, base of lateral pair not saccate, margin membranous. Petals white, broadly spatulate, 2-3 × 0.8-1.1 mm, apex emarginate; claw absent. Filaments 0.9-2 mm; anthers ovate, 0.2-0.3 mm. Ovules (28-)32-52(-60) per ovary. Fruit linear, (5-)7-12(-17) × 1-1.5 mm, erect or rarely divaricate, latiseptate, rarely slightly twisted; valves glabrous, base and apex obtuse, with a distinct midvein; style obsolete, rarely to 0.1 mm. Seeds brown, ovate, 0.6-0.8 × 0.4-0.5 mm. Fl. and fr. Jun-Aug.
苞序葶藶生長環境
生長在海拔2100-4200米的山草甸，高山陽坡草甸，河灘，流石灘，路邊，山坡草甸，山坡林中，石上，亞高山潮濕草甸，陰坡石隙。
苞序葶藶分布範圍
產自內蒙古、河北、山西、湖北、陝西、甘肅、寧夏、青海、新疆、四川、雲南、西藏。蘇聯東西伯利亞有分布。模式標本采自東西伯利亞。