Words similar to cypselas
Example sentences for: cypselas
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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.
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.
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.
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