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Systematics of the tribe orcuttieae gramineae and the description of tuctoria new genus

, : Systematics of the tribe orcuttieae gramineae and the description of tuctoria new genus. American Journal of Botany 69(7): 1082-1095

The 2 genera Neostapfia and Orcuttia, recognized as being closely allied and sharing unusual features, are treated as the sole members of the tribe Orcuttieae. Neostapfia is monotypic; Orcuttia comprises 8 taxa, 6 of which are universally treated as species and 2 as varieties. Studies were based on field work throughout the ranges of these 2 genera and examination of 550 herbarium specimens. Chromosome counts and seed protein analyses for all taxa are presented. Each taxon is worthy of specific status and Orcuttia, as traditionally treated, consists of discordant elements. A more satisfactory taxonomy results when this group is split into 2 genera. A new genus, TUCTORIA, is described and the combinations T. fragilis (Swallen) J. Reeder [basionym: O. fragilis], T. greenei (Vasey) J. Reeder [basionym: O. greenei], and T. mucronata (Crampton) J. Reeder [basionym: O. mucronata] are proposed.

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Related references

Reeder, J.R., 1982: Systematics of the tribe Orcuttieae (Gramineae) and the description of a new segregate genus, Tuctoria. The 2 genera Neostapfia and Orcuttia are treated as sole members of the tribe Orcuttieae. Results of field studies and examination of 550 herbarium spp., chromosome counts and seed protein analyses for the monospecific Neostapfia and the 8 Orcutti...

Reeder,. Jr.;, 1982: Systematics of the tribe Orcuttieae (Gramineae) and the description of a new segregate genus, Tuctoria Chromosomes. American journal of botany 69(7): 1082-1095

Hall, J.P..; Willmott, K.R., 1996: Systematics of the riodinid tribe Symmachiini, with the description of a new genus and five new species from Ecuador, Venezuela and Brazil (Lepidoptera: Riodinidae). Lambillionea. Decembre; 964: 637-660 (Tome 1

Miller, Kelly B., 2009: On the systematics of Noteridae Coleoptera Adephaga Hydradephaga Phylogeny, description of a new tribe, genus and species, and survey of female genital morphology. Systematics and Biodiversity 7(2): 191-214

Jacobs, S.; Bayer, R.; Everett, J.; Arriaga, M.; Barkworth, M.; Sabin-Badereau, A.; Torres, A.; Vazquez, F.; Bagnalls, N., 2007: Systematics of the tribe Stipeae (Gramineae) using molecular data. Internal transcribed spacer (ITS) sequences have been determined for a wide range of stipoid grasses (Poaceae, Pooideae, Stipeae). Nardus was confirmed as the most appropriate outgroup. Anisopogon is consistently included among the stipoid genera....

Reeder, John R., 1965: The tribe Orcuttieae and the subtribes of the Pappophoreae. The tribe Orcuttieae, com prising the California endemic genera Orcuttia and Neostapfia, is described as new. These 2 genera differ from members of the Pappophoreae, their apparent closest allies, in caryopsis and embryo structure and leaf anatomy...

Ferguson, Ik, 1990: The significance of some pollen morphological characters of the tribe Amorpheae and of the genus Mucuna (tribe Phaseoleae) in the biology and systematics of subfamily Papilionoideae (Leguminosae). Aperture configuration, tectal ornamentation and exine stratification are the most significant pollen characters in the subfamily Papilionoideae (Leguminosae). Some trends in pollen characters are closely correlated with trends towards specialisat...

Roalson, E.H.; Columbus, J.T., 1999: Glume absence in the Orcuttieae (Gramineae: Chloridoideae) and a hypothesis of intratribal relationships. This study addresses glume absence in tribe Orcuttieae. In Orcuttia californica, O. inaequalis, and O. viscida, all spikelets possess two glumes except for the terminal spikelet of the inflorescence, which lacks both glumes. In O. pilosa and Tucto...

Renvoize S.A., 1979: A new genus in the tribe arundineae gramineae. A specimen collected by Gossweiler in Angola has proved impossible to match with any species already described. Furthermore it cannot be accommodated in any known genus. It is therefore described as a new genus and species, GOSSWEILEROCHLOA delica...

Kabuye, C.H.S.; Renvoize, S.A., 1975: The genus alloeochaete tribe danthonieae gramineae. A key is given for all the African genera of the tribe Danthonieae. The genus Alloeochaete C. E. Hubbard is reviewed, its taxonomic position discussed and 3 new species are described: A. uluguruensis Kabuye; A. geniculata Kabuye; A. gracillima Kab...