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{| class="wikitable" align="right" |- | style="background: #008080" align= center| '''<big>泉沟子荠</big> ''' |- |<center><img src=http://img1.iplant.cn/gotoimg/236/89D58B75962BF69A.jpg width="300"></center> <small>[http://www.iplant.cn/info/%E6%B3%89%E6%B2%9F%E5%AD%90%E8%8D%A0?t=p 来自 植物智 的图片]</small> |- | style="background: #008080" align= center| |- | align= light| 中文学名:泉沟子荠 拉丁学名:Taphrospermum fontanum 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Magnoliopsida 亚 纲:五桠果亚纲 Dilleniidae 目:白花菜目 科:[[十字花科]] Cruciferae 属:[[沟子荠属]]Taphrospermum C. A. Mey. 族:大蒜芥族 Trib. Sisymbrieae 分布区域:中亚 亚 族:葱芥亚族 Subtrib. Alliariinae |} '''泉沟子荠'''(quán gōu zǐ jì),学名 Taphrospermum fontanum (Maximowicz) Al-Shehbaz & G. Yang,俗名:双脊荠,异名:Dilophia fontana Dilophia macrosperma ,异名:Cochlearia himalaica ,[[沟子荠属]](拉丁文:Taphrospermum C. A. Mey.)是被子植物门[[十字花科]]下的一个科属,该属物种均为无毛,分枝不多的多年生草本植物。高3-6厘米;根肉质,纺锤形。茎多数,丛生,基部匍匐,后上升,分枝,有单毛。基生叶在花期枯萎,茎生叶宽卵形或长圆形。长6-10毫米,宽2-5毫米,顶端圆形,基部圆形或楔形,全缘或每侧有1齿,两面无毛;叶柄长5-15毫米,无毛;上部茎生叶较小,有短叶柄。总状花序在茎端密生,下部花单生叶腋,常有叶状苞片;萼片宽卵形,长约1.5毫米,外面上方稍有柔毛;花瓣白色或浅紫色,长约2毫米,顶端尖凹,下部有短爪。短角果宽卵形或宽倒三角形,长约3毫米,宽约2毫米,压扁,果瓣舟形,有不整齐小刺或小瘤,具1不显明脉,无隔膜;花柱长约2毫米,较粗;果梗直立,开展,长6-8毫米,稍具柔毛。种子4-6个,宽卵形,长约1毫米,棕色;子叶缘倚胚根。花期6-7月,果期8月。 <ref>[http://www.iplant.cn/info/%E6%B3%89%E6%B2%9F%E5%AD%90%E8%8D%A0?t=z 泉沟子荠(附图)],植物智</ref> ==形态特征== 多年生草本,高3-6厘米;根肉质,纺锤形。茎多数,丛生,基部匍匐,后上升,分枝,有单毛。基生叶在花期枯萎,茎生叶宽卵形或长圆形。长6-10毫米,宽2-5毫米; 顶端圆形,基部圆形或楔形,全缘或每侧有1齿,两面无毛;叶柄长5-15毫米,无毛;上部茎生叶较小,有短叶柄。总状花序在茎端密生,下部花单生叶腋,常有叶状苞片; 萼片宽卵形,长约1.5毫米,外面上方稍有柔毛;花瓣白色或浅紫色,长约2毫米,顶端尖凹,下部有短爪。短角果宽卵形或宽倒三角形,长约3毫米,宽约2毫米,压扁; 果瓣舟形,有不整齐小刺或小瘤,具1不显明脉,无隔膜;花柱长约2毫米,较粗;果梗直立,开展,长6-8毫米,稍具柔毛。种子4-6个,宽卵形,长约1毫米,棕色;子叶缘倚胚根。花期6-7月,果期8月。 Herbs (2-)5-14(-20) cm tall, sparsely to moderately pubescent, rarely glabrous. Root narrowly fusiform-linear, fleshy, base with minute scalelike leaves usually less than 2 mm. Stems solitary from fleshy root then producing a few prostrate or rarely ascending or erect branches, sparsely to densely pubescent with retrorse to spreading trichomes to 0.5 mm, rarely glabrous. Leaves not rosulate; petioles of basal and lowermost leaves (0.3-)0.6-2(-3) cm, gradually shorter upward; leaf blade ovate or oblong, (2-)4-10(-13) × (1-)2-4(-7) mm, gradually reduced in size upward, base obtuse or cuneate, margin entire or repand, apex obtuse or rounded. Racemes densely flowered, elongated slightly to considerably in fruit, bracteate throughout; bracts leafy, smaller than cauline leaves. Fruiting pedicels glabrous or pubescent adaxially, slender, straight or curved, (1.5-)3-10(-20) mm. Sepals oblong, 1.5-3 × 0.8-1.5 mm, persistent, membranous at margin, sparsely ciliolate near apex with trichomes ca. 0.05 mm, sparsely pubescent distally with trichomes to 0.5 mm. Petals white or lavender, obovate or spatulate, 2-6 × (0.5-)0.7-3.5(-4) mm, attenuate to base, apex slightly emarginate. Filaments white or lavender, 1.5-3 mm, dilated at base; anthers ovate, 0.3-0.4 mm. Ovules 4-8 per ovary. Fruit broadly to narrowly obcordate, strongly to slightly angustiseptate, not torulose, (2-)3-5 × (4-)5-7 mm, obtuse or cuneate at base; valves membranous, sparsely to densely puberulent with trichomes to 0.5 mm, rarely subglabrous, often distinctly veined, smooth or tuberculate; replum widely and evenly expanded throughout; septum absent; style slender, (1-)2-3 mm. Seeds 3-8, brown, oblong, foveolate, compressed, 1.2-2.2 × 0.8-1.5 mm; cotyledons accumbent. * Slopes with dwarf bushes, disturbed alpine meadows, degraded alpine pastures, moist turf, Kobresia turf and cushions, alpine permafrost swamps, damp shingle by rivers, open gravel, slate and schist screes; (3200-)3600-5300 m. Gansu, Qinghai, Sichuan, Xinjiang, Xizang. 1 Petals 4.5-6 × 2.5-3.5(-4) mm; fruit valves glabrous or sparsely puberulent, smooth, not tuberculate; seeds (1.5-)1.8-2.2 × (1.1-)1.2-1.5 mm 3a subsp. fontanum 泉沟子荠(原亚种) + Petals 2-3 × (0.5-)0.7-1.2(-1.4) mm; fruit valves densely or rarely sparsely puberulent, often tuberculate; seeds 1.2-1.6 × 0.8-1.1 mm 3b subsp. microspermum 小籽泉沟子荠 ==分类文献== Dilophia fontana Maxim. in Bull. Acad. Sci. St. Petersb. 26: 423. 1880. et Fl. Tangut. 70. t. 13. f. 1-18. 1889; O. E. Schulz in Acta Hort. Gothob. 1: 166. 1924; Rehd. et Kobus. in Journ. Am. Arn. 14: 16. 1933: Walker in Contrib. Unit. Star. Nat. Herb. 28: 622. 1941. ——D. macrosperma O. E. Schulz in Fedde, Repent. Sp. Nov. Beih. 12: 385. 1922. Syn. nov. ==产地生境== 产四川、甘肃、青海、新疆、西藏。生在高山草地,海拔4000-5000米。模式标本采自甘肃。 == 参考来源 == {{reflist}} [[Category:370 植物學總論]]
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