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(Vol.13, 2010-12) Transfer Of Hymenoxys Argentea Var. Thoreauensis to Tetraneuris (Asteraceae: Helenieae: Tetraneuridinae)
Based on evidence supporting the recognition of Tetraneuris as a genus separate from Hymenoxys, Hymenoxys argentea var. thoreauensis is basionym of a new combination, Tetraneuris argentea var. thoreauensis.
(Vol. 06, 2003-12) Taxonomy of Tetraneuris (Asteraceae: Helenieae: Tetraneurinae)
Tetraneuris is recognized as a genus separate from Hymenoxys and a taxonomic treatment is presented for the 14 taxa recognized as constituting Tetraneuris: T. acaulis var. acaulis, T. acaulis var. arizonica, T. acaulis ...
(Vol. 04, 2001-12) Taxonomy of Hymenoxys Subgenus Picradenia and a Conspectus of the Subgenera of Hymenoxys (Asteraceae: Helenieae: Tetraneurinae)
Hymenoxys (Helenieae, Tetraneurinae) is composed of 28 taxa distributed in 8 subgenera: 1) subg. Hymenoxys, 2) subg. Dugaldia, 3) subg. Macdougalia, 4) subg. Phileozera, 5) subg. Picradenia, 6) subg. Picradeniella, 7) subg. ...
(Vol.12, 2009-12) Hymenoxys Ambigens Var. Wagneri (Asteraceae: Helenieae: Tetraneurinae), A New Variety in Hymenoxys Subgenus Plummera from Arizona
Hymenoxys ambigens var. wagneri is a new variety endemic to the Dragoon Mountains of Cochise County, Arizona.
(Vol. 01, 1998-05) Systematic Implications of DNA Restriction Site Variation In Hymenoxys and Tetraneuris (Asteraceae, Helenieae, Gaillardiinae)
Generic delimitation in the Hymenoxys complex has long been problematic. One taxonomic extreme would recognize only Hymenoxys, whereas the other would split the obviously related taxa into as many as eight genera. This ...
(Vol. 08, 2005-12) Taxonomy of Hymenoxys Subgenus Rydbergia (Asteraceae: Helenieae: Tetraneurinae)
Hymenoxys subg. Rydbergia comprises H. brandegeei, H. grandiflora, and H. insignis. The treatment includes a discussion of the original circumscription of the taxa, the description of the genus Rydbergia to accommodate H. ...