Sonchus asper ssp. asper, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Scientific Name, Sonchus asper (L.) Hill. Common Names, English: Spiny sowthistle, Prickly sowthistle; German; Raue Gänsedistel; French: Laiteron épineux;. Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread plant in the.


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Small or isolated populations may be manually removed while plants are young, prior to seed set.

The taproot must be removed, as resprouting can sonchus asper if left in the soil Elkhorn Slough National Estuarine Research Reserve, in Guertin, Slashing is often ineffective as flowers continue to be produced FloraBase, Regular cultivation of plants, every three months or so, will stimulate germination and can sonchus asper to a diminished seed bank.

Mulching and soil sterilisation methods can complement other management efforts Elkhorn Slough National Estuarine Research Reserve, in Guertin, Grazing of Sonchus spp.

Prickly Sowthistle (Sonchus asper)

They also make excellent feed for livestock. For control of Sonchus spp.

The hairless leaves are glabrous, and they tend to be folded upward along the central vein. However, there are no prickles sonchus asper the central vein on the underside of each leaf.


Sonchus asper the stems and the leaves contain a milky latex. The upper stems terminate in clusters of composite flowers on rather short stalks. The blooming period can occur from late sonchus asper to early fall, and usually lasts about a month for a colony of plants.


Each floret is replaced by an achene with a tuft of silky white hairs. The achenes are sonchus asper, spindle-shaped, hairless, and have several longitudinal ribs.


Herb is used sonchus asper an emollient. If yes, Your name: Receptacle slightly concave in flower.

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Viability of Seeds years Propagation By wind-dispersed seed. The average number of seeds sonchus asper flower head isand a plant often has over flower heads.

Seed sonchus asper per plant range from 21, to 25, but a large plant may produce 60, Occurrence Waste ground, disturbed sites, roadsides, railroads. Soil Most soils but S. Check our website sonchus asper www.

The control methods referred to in this fact sheet should be used in accordance with the restrictions federal and state legislation, and local government laws directly or indirectly related to each control method.

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