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POISONOUS PLANTS
Author(s) -
C A Gretsch,
T Litovitz
Publication year - 1923
Publication title -
medical journal of australia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 131
eISSN - 1326-5377
pISSN - 0025-729X
DOI - 10.5694/j.1326-5377.1923.tb118811.x
Subject(s) - citation , computer science , information retrieval , library science
Taxonomy: Spotted knapweed is in the Asteraceae (sunflower) family. In its native range of Western, Central, and Eastern Europe, two sub-species have been identified; Centaurea stoebe spp. stoebe is diploid and biennial, and subspecies C. stoebe spp. micranthos is tetraploid and perennial. The perennial subspecies is considered more invasive in Europe than the biennial subspecies. The invasiveness of the North American taxon, C. stoebe spp. micranthos, has been ascribed to it being perennial because it can tolerate dense vegetation once it has become established, whereas the biennial is more dependent on disturbance.