Premium
POLLEN STUDIES IN THE GENUS CORDIA (BORAGINACEAE)
Author(s) -
Nowicke Joan W.,
Ridgway John E.
Publication year - 1973
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1973.tb05961.x
Subject(s) - biology , boraginaceae , reticulate , pollen , botany , genus , inflorescence , sporophyte , taxon
The pollen of 40 species of Cordia L. was studied by light microscopy and scanning and transmission electron microscopy. Three major types were found, 3‐porate with a reticulate sexine, 3‐colpate to 3‐colporoidate with a striatoreticulate sexine, and 3‐colpate to 3‐colporate with a spinulose sexine. These pollen types are correlated with significant differences in the inflorescence, flower, and fruit structures found in the sporophyte. The following revisions are suggested and discussed: that Cordia sect. Varronia P. Br. be elevated to generic status; that Cordia sebestena L. and a few close allies be treated as generically distinct; and that Cordia myxa L. be conserved as the lectotype for the genus, thus continuing a wide application of the epithet Cordia .