水马齿Callitriche stagnalis Scop.
水马齿Callitriche stagnalis Scop.
4.水马齿（中国高等植物图鉴）图版4：8-10
Callitriche stagnalis Scop., Fl. Carniol. 2: 251. 1772; C. B. Clarke in Hook. f. Fl. Brit. Ind. 2: 434. 1876; Pax in Engl. u. Prantl, Nat. Pflanzenfam. 3 (5): 123, f. 77, F. 1896; A. Guillaumin in Lecte. Fl. Gen. Indo-Chine 2: 719. 1920; Hand.-Mazz. Symb. Sin. 7: 238. 1933; V. Krecz. in Schischk. et Bobr. Fl. URSS 14: 501, t. 26, f. 10. 194.
一年生草本，高10-30厘米。叶对生，茎顶密集排列呈莲座状，浮于水面，倒卵形或倒卵状匙形，长3-3.5毫米，宽2-3毫米，先端圆形，基部渐狭，两面具褐色小斑点，具3脉；茎生叶匙形或长圆状披针形，长6-9毫米，宽2-4毫米。花单性，同株，单生叶腋，为两个小苞片所托，苞片膜质，线形，长约0.5毫米，灰白色，雄花：雄蕊1,花丝线形，长约2毫米，花药卵形，长约0.3毫米；雌花：子房扁圆形，宽过于长，长约1毫米，花柱2,长约1.5毫米；花梗短，长约0.5毫米。果横椭圆形，长约1.5毫米，宽约2毫米，周边具宽翅，两端微凹，花柱早落。
产云南、西藏，生于海拔1850-4200米的水沟、沼泽、湿地或水田中。分布于各大洲。
《Flora of China》 Vol. 11 (2008)
Callitriche palustris Linnaeus
水马齿 shui ma chi
Plants submerged, with floating rosettes or on wet mud. Blade of lingulate leaves linear to narrowly expanded, (4-)5.6-9.7 × 0.5-1.2 mm, emarginate, with single vein; blade of expanded leaves elliptic to ± orbicular, 3.6-9.9(-10.3) × 1.2-4.3(-4.5) mm; most leaves with tertiary vein, generally also with additional veins arising from secondary veins, either as loops rejoining adjacent secondary veins or as short slightly curved veins pointing ± directly to leaf blade margin. Flowers usually represented by a carpellate flower in each axil or a staminate and carpellate flower in an axil opposed by a single carpellate flower, or more occasionally 1 staminate and up to 3 carpellate flowers opposite a single carpellate flower in an axil; solitary flowers of both sexes may occur with either a shoot or nothing in opposite axil; bracts translucent, whitish, persistent, caducous or lacking; pollen 6-24 × 5-23 μm, probably inaperturate, yellow, ± spherical, exine strongly ornamented, sculpture type a reticulate pattern or muri, lacking supratectal elements. Fruits 0.9-1.4 × 0.8-1.1 mm, sessile, higher than wide; wing 0.05-0.16 mm wide or lacking, when present wider toward apex of fruits.
Lakes, ponds, swamps, marshes, streams, ditches, rice fields; near sea level to 9500 m. Anhui, Fujian, Guangdong, Guizhou, N Heilongjiang, Hubei, Jiangsu, Jiangxi, E Jilin, E Liaoning, E Nei Mongol, Qinghai, Sichuan, Taiwan, SE Xizang, Yunnan, Zhejiang [Bhutan, India, Japan, Kashmir, Korea, Nepal, Russia; Europe, North America].
别名：水马齿苋;东北水马齿;pond water-starwort;
科名：水马齿科 Callitrichaceae
属名：水马齿属 Callitriche
4.水马齿（中国高等植物图鉴）图版4：8-10
Callitriche stagnalis Scop., Fl. Carniol. 2: 251. 1772; C. B. Clarke in Hook. f. Fl. Brit. Ind. 2: 434. 1876; Pax in Engl. u. Prantl, Nat. Pflanzenfam. 3 (5): 123, f. 77, F. 1896; A. Guillaumin in Lecte. Fl. Gen. Indo-Chine 2: 719. 1920; Hand.-Mazz. Symb. Sin. 7: 238. 1933; V. Krecz. in Schischk. et Bobr. Fl. URSS 14: 501, t. 26, f. 10. 194.
一年生草本，高10-30厘米。叶对生，茎顶密集排列呈莲座状，浮于水面，倒卵形或倒卵状匙形，长3-3.5毫米，宽2-3毫米，先端圆形，基部渐狭，两面具褐色小斑点，具3脉；茎生叶匙形或长圆状披针形，长6-9毫米，宽2-4毫米。花单性，同株，单生叶腋，为两个小苞片所托，苞片膜质，线形，长约0.5毫米，灰白色，雄花：雄蕊1,花丝线形，长约2毫米，花药卵形，长约0.3毫米；雌花：子房扁圆形，宽过于长，长约1毫米，花柱2,长约1.5毫米；花梗短，长约0.5毫米。果横椭圆形，长约1.5毫米，宽约2毫米，周边具宽翅，两端微凹，花柱早落。
产云南、西藏，生于海拔1850-4200米的水沟、沼泽、湿地或水田中。分布于各大洲。
《Flora of China》 Vol. 11 (2008)
Callitriche palustris Linnaeus
水马齿 shui ma chi
Plants submerged, with floating rosettes or on wet mud. Blade of lingulate leaves linear to narrowly expanded, (4-)5.6-9.7 × 0.5-1.2 mm, emarginate, with single vein; blade of expanded leaves elliptic to ± orbicular, 3.6-9.9(-10.3) × 1.2-4.3(-4.5) mm; most leaves with tertiary vein, generally also with additional veins arising from secondary veins, either as loops rejoining adjacent secondary veins or as short slightly curved veins pointing ± directly to leaf blade margin. Flowers usually represented by a carpellate flower in each axil or a staminate and carpellate flower in an axil opposed by a single carpellate flower, or more occasionally 1 staminate and up to 3 carpellate flowers opposite a single carpellate flower in an axil; solitary flowers of both sexes may occur with either a shoot or nothing in opposite axil; bracts translucent, whitish, persistent, caducous or lacking; pollen 6-24 × 5-23 μm, probably inaperturate, yellow, ± spherical, exine strongly ornamented, sculpture type a reticulate pattern or muri, lacking supratectal elements. Fruits 0.9-1.4 × 0.8-1.1 mm, sessile, higher than wide; wing 0.05-0.16 mm wide or lacking, when present wider toward apex of fruits.
Lakes, ponds, swamps, marshes, streams, ditches, rice fields; near sea level to 9500 m. Anhui, Fujian, Guangdong, Guizhou, N Heilongjiang, Hubei, Jiangsu, Jiangxi, E Jilin, E Liaoning, E Nei Mongol, Qinghai, Sichuan, Taiwan, SE Xizang, Yunnan, Zhejiang [Bhutan, India, Japan, Kashmir, Korea, Nepal, Russia; Europe, North America].