双片苣苔 Didymostigma obtusum

中文名(Chinese Name):双片苣苔
学名(Scientific Name):Didymostigma obtusum (Clarke) W. T. Wang
英文名(English Common Name):
别名(Chinese Common Name):唇柱苣苔
异名(Synonym):Chirita obtusa C. B. Clarke  Didymocarpus clarkei H. Lév.  Roettlera obtusa (C. B. Clarke) Kuntze
科属(Family & Genus):苦苣苔科(Gesneriaceae)双片苣苔属
形态特征(Description):茎渐升或近直立,长12-20厘米,有3-5节,不分枝或分枝,多少密被柔毛。叶对生;叶片草质,卵形,长2-10厘米,宽1.4-7厘米,顶端微尖或微钝,基部稍斜,宽楔形或斜圆形,边缘具钝锯齿,两面被柔毛,下面毛稀疏,并常带紫红色,侧脉每侧5-8条;叶柄长0.8-3.8厘米,被柔毛。花序腋生,不分枝或2-4回分枝,有2-10花;花序梗长15-4厘米,被柔毛;苞片披针状线形,长3-6毫米,宽0.5-1毫米,被柔毛。花萼长7.5-10毫米,5裂至基部,裂片披针状狭线形,宽约1毫米,被柔毛。花冠淡紫色或白色,长3.6-5.2厘米,外面有稀疏极短的柔毛;筒细漏斗形,长3-3.5厘米,口部粗0.7-1.2厘米,中部以下粗2-4毫米;上唇长5-7毫米,下唇长9-12毫米。雄蕊无毛,花丝着生于距花冠基部2.5-3.6毫米处,长约10毫米,稍扭曲,花药长约2毫米;退化雄蕊2,着生于距花冠基部2.3-3.5厘米处,长约5毫米。花盘环状,高约0.5毫米,全缘。雌蕊长2.2-3.4厘米,子房和花柱被疏柔毛,柱头长约1毫米。蒴果长4-8厘米。种子椭圆形,长约0.4毫米。花期6-10月。
分布(Distribution):产广东和福建。生于海拔约650米山谷林中或溪边阴处。
用途(Use):
引自中国植物志英文版FOC Vol. 18 Page 292
Didymostigma obtusum (C. B. Clarke) W. T. Wang, Acta Phytotax. Sin. 22: 189. 1984.
双片苣苔 shuang pian ju tai | Gesneriaceae  | Didymostigma
Chirita obtusa C. B. Clarke in A. & C. de Candolle, Monogr. Phan. 5: 114. 1883; Didymocarpus clarkei H. Léveillé; Roettlera obtusa (C. B. Clarke) Kuntze.
Stems ascending to nearly erect, 12-20 cm, pubescent to densely pubescent. Petiole 0.8-3.5 cm; leaf blade ovate, 2-10.5 X 1.4-5(-7) cm, adaxially pubescent, abaxially sparsely pubescent, abaxial surface often purple tinged, base sometimes slightly oblique, broadly cuneate to rounded, margin crenate, apex acute to obtuse. Cymes 2-10-flowered; peduncle 1.5-4 cm, pubescent; bracts linear, 3-6 X 0.5-1 mm, pubescent. Calyx segments lanceolate-linear, 7.5-10 mm. Corolla white, purple-blue near apex, 3.6-5.2 cm; tube 2.7-4 cm; adaxial lip 5-7 mm; abaxial lip 0.9-1.2 cm. Stamens ca. 1.2 cm; filaments slightly tortuous; anther connective not projecting; staminodes 2, ca. 5 mm. Pistil 2.2-3.8 cm, sparsely pubescent; gynophore absent; ovary ca. 1.6 cm. Capsule 4-8 cm. Fl. Jun-Oct, fr. Oct.
* Forests, shaded streamsides; 200-800 m. S Fujian, Guangdong, Guangxi, Hainan.
双片苣苔 Didymostigma obtusum

双片苣苔 Didymostigma obtusum
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