Scientific name Lepidium apetalum Willd. It is a crucifer's annual or annual herb. Alias ​​glands alone spicy horseradish and so on. Distributed in the northeast, north, northwest and southwest provinces. The main damage is wheat, vegetables and fruit trees.
Morphological characteristics Stems erect, plant height 10-13cm, base more branched, with head-shaped glandular hairs. Basal leaves clustered, long-stalked, leaf needle-shaped, with feathery lobed or deeply lobed; stem leaves alternate, sessile or shortly stalked, blade blade-shaped, entire or sparsely toothed. The general sequence, terminal, has 4 petals, white or slightly greenish, the flowers are small, the statues fall early, the petals degenerate into filaments, with 2 stamens. Short-hipped figs elliptic to suborbicular, flattened, slightly hollow at apex, narrowly winged at upper part. The seeds are red-brown and have an inverted ovate ellipsoid. Rely on seeds.
The ecological characteristics of the overwintering seedlings of Heilongjiang's new-year students turn green when the soil is thawed in the middle and early April and next April, and stems or branches and flowers in May. The seeds mature in the first half of June in the next July. After 14 days of dormancy, the seedlings began to sprout in August of that year. The seedlings only grew vegetatively in that year, and they were able to bloom and become strong in the following year.
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