Words similar to cypselas
Example sentences for: cypselas
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Picrothamnus was established by Nuttall, but reduced as A. spinescens Hall and Clements, and according to Bremer and Humphries [ 2 ] is essentially Dracunculus with two autapomorphies: spiny habit and cobwebby-pilose cypselas.
Neopallasia is a genus of three species that occur in central Asia, including southern Siberia, Mongolia, and China [ 2 ] . It was segregated from Artemisia by Poljakov [ 66 ] on the basis of several autapomorphies, including pectinate leaves, central-sterile florets at the apex of the capitulum, ovoid-lanceolate anther appendages, and a rosette-shaped arrangement of cypselas on the receptacle.
According to Bremer and Humphries [ 2 ] , the Artemisia -group is monophyletic and defined by heterogamous-disciform capitula (disk florets usually bisexual and fertile, ray florets pistillate) or homogamous-discoid capitula (disk florets usually bisexual and fertile, ray florets absent), pollen with short or no spines (associated with anemophily), and thick-walled cypselas devoid of ribs (sometimes faint ribs are present in Sphaeromeria and Crossostephium ). All of the Artemisia -group genera contain species that have been variously placed within the taxonomic boundaries of Artemisia s.l.
Monotypic Crossostephium was treated as a segregate genus of Artemisia by Bremer and Humphries [ 2 ] . It is distinct from Artemisia by the presence of a coroniform pappus, however it was once placed near A. californica by Gray [ 45 ] and Rydberg [ 47 ] on the basis of deeply-ribbed cypselas.
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