Sonchus asper (L.) Hill
 
FamilyCompositae — APG family: Asteraceae
SynonymsSonchus olearaceus var. asper L.
Common namespiny-leaved sow thistle
DescriptionSimilar to S. oleraceus, but stem leaves with rounded auricles; achenes smooth, 3-ribbed on both sides; leaves stiffer, less dissected.
EcologyWaste places; an introduced weed. Described from Europe.
Hultén's Flora About

This is a digital representation of Eric Hultén’s ‘Flora of Alaska and Neighboring Territories: A Manual of the Vascular Plants’, which was published by Stanford University Press in 1968. The book was digitized by C. Webb (at UAMN) as part of the Flora of Alaska project, with funding by the US NSF (Grant 1759964 to Ickert-Bond & Webb), and with permission of Stanford University Press. Data and images © 1968 Board of Trustees of the Leland Stanford Jr. Univ. Usage licence: Creative Commons BY-NC-SA 4.0. NB: You may find OCR errors; please refer to the hard-copy if in doubt.