Premium
Comments on the identity of Ageratum conyzoides L., and A. houstonianum Mill. — two naturalized weeds in India
Author(s) -
Sharma V. S.
Publication year - 1987
Publication title -
feddes repertorium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.24
H-Index - 25
eISSN - 1522-239X
pISSN - 0014-8962
DOI - 10.1002/fedr.19870981104
Subject(s) - ageratum conyzoides , taxon , mill , botany , biology , identity (music) , herbarium , indian subcontinent , weed , geography , sociology , archaeology , ethnology , philosophy , aesthetics
Ageratum conyzoides L., and A. houstonianum Mill., are two exotic weeds completely naturalized in Indian subcontinent invading even the Himalaya. Both are easily confused for each other in herbaria as well as in the field. Reliable morphological characters to distinguish these two closely resembling taxa have been identified and illustrated to facilitate unmistaken determination. Also some observations have been made to Sahu's treatment of these two species with a caution to apply the numerical data to change the taxonomic status of any well established taxon, and instead to utilize the numerical methods in the analysis of evolutionary phenomena.