Words similar to crossostephium
Example sentences for: crossostephium
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Drancuculus , as well as Seriphidium, Crossostephium, Neopallasia , and Sphaeromeria ; 2) Filifolium and species of Artemisia subg.
Three of the eight segregate and allied genera that we examined were placed outside of the Artemisia -group (including Stilnolepis, Elachanthemum, and Kaschgaria ), whereas the remaining five were placed within it (including Seriphidium, Sphaeromeria, Neopallasia, Crossostephium , and Filifolium ). However many of these placements are among the most weakly supported branches of the resulting phylogenetic trees (Fig.
Although placements of both are weakly supported (68 and 57% probabilities for Crossostephium and A. californica , respectively; Fig 1).
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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