大爪草Spergula arvensis Linnaeus

别名：corn spurry;

科名：石竹科 Caryophyllaceae

属名：大爪草属 Spergula

《中国植物志》第26卷056页
  1. 大爪草（中国植物图鉴）图版12：1-5
  Spergula arvensis L., Sp. Pl. 440. 1753; Ser. in DC. Prodr. 1: 394. 1824; Ledeb., Fl. Ross. 2: 169. 1824; Maxim. in Bull. Acad. Sci. St. Petersb. 18: 387. 1873; Britt. et Brown., Illustr. Fl. 2: 36. fig. 1513. 1879; Hegi, Illustr. Fl. Mittel Europ. 3: 418. taf. 107. fig. 6. 621. (m-p.) 1912; Ohwi, Fl. Jap. 488. 1956; 东北草本植物志3: 1.图版1.图1-5. 1975; 中国高等植物图鉴补编1: 291.图8542. 1982. ——S. vulgaris Boenn. , Prodr. Fl. Monast. 135. 1824; Schischk. in Kom. Fl. USSR 6: 551. tab. 32. fig. 5. 1936.
  一年生草本。茎丛生，高13-50厘米，多分枝，被疏柔毛，上部具短腺毛。叶片线形，长1.5-4厘米，宽0.5-0.7毫米，顶端尖，稍弯曲，具1明显中脉，无毛或疏生腺毛；托叶小，膜质。聚伞花序稀疏；花小形，白色；花梗细，果时常下垂；萼片卵形，长约3毫米，顶端钝，被腺毛，边缘膜质；花瓣卵形，全缘，顶端钝，微长于萼片；雄蕊10，短于萼片；子房卵圆形，花柱极短。蒴果宽卵形，直径约4毫米，5瓣裂，明显长于宿存萼；种子近圆形，稍扁，直径1.2-1.3毫米，具狭翅，两面具乳头状凸起。花期6-7月，果期7-8月。
  产黑龙江、云南（昆明）、贵州（盘县）。生于江边草地。北温带广布，南达印度和北非。模式标本采自欧洲。
  可作家畜饲料。

《Flora of China》 Vol. 6 (2001)
Spergula arvensis  Linnaeus
大爪草   da zhua cao
Spergula linicola Boreau ex Nyman; S. maxima Weihe; S. sativa Boenninghausen; S. vulgaris Boenninghausen.
Plants annual. Stems (7--)13--50(--60) cm, pilose, apically glandular hairy. Stipules triangular-ovate, small, soon deciduous. Leaf blade linear, (1.1--)1.5--4 cm × 0.5--0.7 mm, abaxially channeled, glabrous or glandular pubescent, apex acute. Cymes lax, at first dichasial, upper branches monochasial. Pedicel 1.5--2.5 cm, slender. Sepals ovate, 3(--5) mm, glandular pub-scent, apex subacute to obtuse. Petals obovate, slightly shorter than to slightly longer than sepals, apex obtuse. Stamens 10, shorter than ovary. Ovary ovoid; style extremely short; stigmas 5. Capsule ovoid, ca. 4 mm in diam., slightly longer than sepals. Seed gray-black, subglobose, slightly compressed, 1--2 mm, both surfaces often with minute, pale, club-shaped papillae, margin with narrow wing. Fl. Jun--Jul, fr. Jul--Aug.
Grasslands, riverbanks. SW Guizhou, N Heilongjiang, Shandong, Yunnan [Bhutan, N India, Japan, Kazakhstan, Philippines, Russia, Sikkim; N Africa, SW Asia, Europe, North America].
This plant is a weed of wheat fields, and is used as fodder.