Field weeds - Spearfish

Scientific name Cepalanopsis segetum (Bunge.) Kitaml is a perennial herb belonging to the family Asteraceae. Alias ​​is small. Distributed throughout the country. The main damage is wheat, cotton, soybeans and other dry crops.

Morphological characteristics of the root length. Stems erect, glabrous or arachnid hairy, plant height 20 to 50cm. Leaves alternate, sessile. Leaf blade elliptic to oblong-lanceolate, entire or dentate, spiny. Both sides are spider silky hairs; flower head solitary at stem end, dioecious, male plant inflorescence less than female, total length 18mm, female plant 23mm; total sepals multi-layered, apex spiny; flowers pale red Or purplish red. Achenes oblong to long ovate, pinnately hairy. By root buds are mostly breeding.

Ecological characteristics are born on farmland, roadsides or wastelands. Kosaka is born in a slightly acidic to neutral soil with a large amount of humus, and has strong viability and regenerative ability. Each bud can develop into a new plant, and the root can still survive. It is easy to spread in the field and it is difficult to clear after forming a community.