Now showing items 1-10 of 24
(Vol.14, 2011-12) A Nomenclator Of Diplostephium (Asteraceae: Astereae): A List Of Species with Their Synonyms and Distribution by Country"
Since the description of Diplostephium by Kunth in 1820, more than 200 Diplostephium taxa have been described. In the absence of a recent revision of the genus, a nomenclator of Diplostephium is provided based on an extensive ...
(Vol.14, 2011-12) A Study of Chaptalia (Asteraceae: Mutisieae) in Central, Southern, and Western Texas and the Resurrection of Chaptalia Carduacea
Recent authors have considered there to be just one species of Chaptalia in central, southern, and western Texas and have called it C. nutans, C. nutans var. texana, or C. texana. Field studies in Travis and Hays counties ...
(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.12, 2009-12) Iva Corbinii (Asteraceae): A Remarkable New Species From Travis County, Texas
Iva corbinii is described from the Colorado River bottoms of Travis County, Texas, to which it appears restricted. It is a remarkably distinct species, having predominately axillary, single heads; its closest relationship ...
(Vol.12, 2009-12) A New Species of Roldana (Asteraceae) from Southern Oaxaca
Roldana uxordecora is described from Oaxaca, Mexico (Municipio de San Mateo Rı´o Hondo). The genus Roldana is common in the montane regions of the state of Oaxaca (22 species), and this addition to Roldana adds to a list ...
(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. 09, 2006-12) Three New Species of Ageratina (Asteraceae: Eupatorieae) from Oaxaco, Mexico and a Key to the A. Mairetiana Complex
Three new species of Ageratina subg. Neogreenella are described from Mexico, as follows: Ageratina mayajana, from Mpio. San Miguel Chimalapa, Oaxaca; Ageratina mazatecana, from Mpio. Santa Maria Chilchotla, Oaxaca; and ...
(Vol. 09, 2006-12) Mutisieae (Asteraceae) Pollen Ultrastructure Atlas
The tribe Mutisieae (excluding Barnadesieae) traditionally comprises 84 genera and approximately 900 species in three subtribes: Gochnatiinae, Mutisiinae, and Nassauviinae. We examined whole and fractured pollen grains of ...
(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. 01, 1998-05) A New Species of Ageratina (Asteraceae: Eupatorieae) from Northwestern Oaxaca
Fieldwork in connection with the project to document the flora of the Mixteca Alta region of the state of Oaxaca has resulted in the discovery of a new species in the district of Juxtlahuaca, Ageratina juxtlahuacensis. Its ...