單花老鸛草
| 單花老鸛草 |
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中文學名:單花老鸛草 別 稱:單花牻牛兒苗、 早田氏牻牛兒苗、早田氏 香葉草、單花香葉草 二名法:Geranium hayatanum Ohw 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:牻牛兒苗目 科:牻牛兒苗科 屬:老鸛草屬 組:沼生組 |
單花老鸛草（學名：Geranium hayatanum）為牻牛兒苗科老鸛草屬的植物，為台灣的特有植物。分布於台灣，目前尚未由人工引種栽培。 [1]
目錄
單花老鸛草形態特徵
多年生草本，高30-50厘米，被柔毛。莖直立，不分枝，葉對生；葉柄長1-5.5厘米；葉片寬圓形或五角狀，寬2-6厘米，3-5深裂，裂片楔狀倒卵形，上部不規則羽狀齒裂，小裂片先端急尖。
花單生，總花梗長於葉；苞片2，長3-8毫米；花梗長2-8厘米；萼片寬卵形，長10-15毫米，寬3-5毫米，先端具尖頭；花瓣倒卵形，紫紅色，長約為萼片的1.5倍，先端鈍圓、微凹，基部楔形。
蒴果長約2.5厘米。 [2]
PDFGeranium hayatanum Ohwi in Act. Phytotax. Geobot. 2: 152. 1933; Fl. Taiwan. 3: 428. 1977.——Geranium uniflorum Hayata in Journ. Coll. Sci. Univ. Tokyo 25 (19): 65. 1908 et 30 (1): 50. 1911 (non Pach.); Icon. Pl. Form. 1: 113. 1911 et 7: 4. Pl. 3. 1918.
Perennials. Rootstock ± horizontal, 3.6-8 mm in diam., not tuberculate, with thickened roots along rootstock. Stem 18-60 cm tall, trailing or ascending, not rooting at nodes, with 0.2-1 mm patent to retrorse nonglandular trichomes. Stipules broadly ovate, connate. Leaves opposite; petiole with 0.3-1 mm patent to retrorse nonglandular trichomes; leaf blade 2.8-7.2 cm, palmately cleft, ratio of main sinus/middle segment length = 0.75-0.92, pilose with appressed nonglandular trichomes; segments 5, rhombic, 3.4-9.8 mm wide at base, 5-11-lobed in distal half, ratio of second sinus/middle segment length = 0.21-0.38. Cymules solitary, 1-flowered; peduncle (0.9-)2.4-7.6(-15.4) cm. Pedicel 1.5-3(-5) cm, with 0.2-0.8 mm patent to retrorse sometimes uncinate nonglandular trichomes; bracteoles lanceolate. Sepals 6.5-10.1 mm, mucro 1.1-2.5 mm, ratio of mucro/sepal length = 0.14-0.24, outside with 0.2-1.4 mm antrorse to patent nonglandular trichomes, inside glabrous. Petals light purplish with a whitish base, (1.2-)1.4-1.8(-2) cm, erect to patent, both surfaces basally with trichomes, margin basally ciliate, apex rounded or rarely emarginate with a 0.2-0.4 mm notch. Staminal filaments purplish distally but paler at base, lanceolate, abaxially pilose and proximal half ciliate, trichomes 0.2-0.6 mm; anthers bluish, 1.7-2.1 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma deep pink. Fruit 2.4-3.2 cm, erect when immature; mericarps smooth, with a basal callus, with 0.3-1.2 mm erect to patent nonglandular trichomes; rostrum 1.5-2.3 cm, with a 1.6-3.4 mm narrowed apex; stigmatic remains 3.5-5.6 mm. Seeds 2.3-3.5 mm. Fl. Jul, fr. Aug.
單花老鸛草生長環境
喜歡潮濕濕熱環境，生長於台灣山林地區。
單花老鸛草分布範圍
主要分布於我國台灣，特有植物，目前尚未由人工引種栽培。