东北水马齿Callitriche palustris Linn. var. elegans (V.Petr.) Y.L.Chang
东北水马齿Callitriche palustris Linn. var. elegans (V.Petr.) Y.L.Chang
2b.东北水马齿（东北草本植物志）图版4：6-7
var. elegans (V. Petr.) Y. L. Chang,东北草本植物志6: 53, 图版21, 7-8. 1977. ——C. elegans V. Petr. in Bull. Jard. Bot. Print. URSS. 27: 360. 1928. ——C. verna L. ssp. elegans V. Petr. ex Kom. et Alis., Key Pl. Far. East. Reg. URSS 2: 712, t. 219. 1932.
与原变种之区别是果实周边具狭翅。
产我国东北，生于溪流、沼泽或湿地。分布于苏联东部和日本北部。
形态特征：本种与正种的区别：果实倒卵状椭圆形或近椭圆形．周围皆具狭翼或较宽的翼。
生长环境：生长在溪流及沼泽中，湿地也有。
花期果期：
用 途：
《Flora of China》 Vol. 11 (2008)
Callitriche palustris var. elegans (Petrov) Y. L. Chang
东北水马齿 dong bei shui ma chi
Callitriche bengalensis Petrov, Izv. Glavn. Bot. Sada S.S.S.R. 27: 358. 1928; C. elegans Petrov; C. verna subsp. elegans Petrov ex Komarov & Alissova; C. verna var. elegans (Petrov) Kitagawa.
Flowers generally with a carpellate and staminate flower in one of a pair of axils opposed by a single carpellate flower in other axil, very occasionally 2 carpellate flowers and 1 staminate flower in a single axil; bracts caducous, 0.8-1.2 mm, falcate; styles erect to slightly spreading, shorter than 1.5 mm; filaments ± straight, fugacious, rarely visible in axils below rosettes, shorter than 2.2 mm; anthers ca. 0.4 × 0.3 mm; pollen yellow, ovoid-ellipsoid, 21-26 × 17-25 μm. Fruit 1-1.4 × 0.7-1.1 mm, widest above middle, slightly strumose, black when mature, mericarps sharply reticulate, reticulations appearing ± clearly in vertical rows; wing less than 0.3 mm wide, mainly toward apex. Fr. throughout year.
Lakes, ponds, streams, ditches, swamps, marshes; near sea level to 5000 m. N Heilongjiang, Hong Kong, Jiangxi, E Jilin, Liaoning (Anshan), E Nei Mongol [Japan, E Russia].
科名：水马齿科 Callitrichaceae
属名：水马齿属 Callitriche
2b.东北水马齿（东北草本植物志）图版4：6-7
var. elegans (V. Petr.) Y. L. Chang,东北草本植物志6: 53, 图版21, 7-8. 1977. ——C. elegans V. Petr. in Bull. Jard. Bot. Print. URSS. 27: 360. 1928. ——C. verna L. ssp. elegans V. Petr. ex Kom. et Alis., Key Pl. Far. East. Reg. URSS 2: 712, t. 219. 1932.
与原变种之区别是果实周边具狭翅。
产我国东北，生于溪流、沼泽或湿地。分布于苏联东部和日本北部。
形态特征：本种与正种的区别：果实倒卵状椭圆形或近椭圆形．周围皆具狭翼或较宽的翼。
生长环境：生长在溪流及沼泽中，湿地也有。
花期果期：
用 途：
《Flora of China》 Vol. 11 (2008)
Callitriche palustris var. elegans (Petrov) Y. L. Chang
东北水马齿 dong bei shui ma chi
Callitriche bengalensis Petrov, Izv. Glavn. Bot. Sada S.S.S.R. 27: 358. 1928; C. elegans Petrov; C. verna subsp. elegans Petrov ex Komarov & Alissova; C. verna var. elegans (Petrov) Kitagawa.
Flowers generally with a carpellate and staminate flower in one of a pair of axils opposed by a single carpellate flower in other axil, very occasionally 2 carpellate flowers and 1 staminate flower in a single axil; bracts caducous, 0.8-1.2 mm, falcate; styles erect to slightly spreading, shorter than 1.5 mm; filaments ± straight, fugacious, rarely visible in axils below rosettes, shorter than 2.2 mm; anthers ca. 0.4 × 0.3 mm; pollen yellow, ovoid-ellipsoid, 21-26 × 17-25 μm. Fruit 1-1.4 × 0.7-1.1 mm, widest above middle, slightly strumose, black when mature, mericarps sharply reticulate, reticulations appearing ± clearly in vertical rows; wing less than 0.3 mm wide, mainly toward apex. Fr. throughout year.
Lakes, ponds, streams, ditches, swamps, marshes; near sea level to 5000 m. N Heilongjiang, Hong Kong, Jiangxi, E Jilin, Liaoning (Anshan), E Nei Mongol [Japan, E Russia].