DOI
10.5642/aliso.19991801.17
First Page
67
Last Page
70
Abstract
This study addresses glume absence in tribe Orcuttieae. In Orcuttia califomica, 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 Tuctoria greenei the terminal spikelet lacks only the first (proximal) glume, whereas in O. tenuis, T. fragilis, and T. mucronata both glumes are developed on all spikelets. This is the first report of glume absence in species of Orcuttieae other than Neostapfia colusana, which has been long reported to lack both glumes on all spikelets. A hypothesis of phylogenetic relationships in the tribe is presented and characters involved are discussed. We hypothesize Neostapfia to be sister to a Tuctoria/Orcuttia clade, and Tuctoria to be a grade leading to a monophyletic Orcuttia.
Recommended Citation
Roalson, Eric H.
(1999)
"Glume absence in the Orcuttieae (Gramineae: Chloridoideae) and a hypothisis of intratribal relationships,"
Aliso: A Journal of Systematic and Floristic Botany:
Vol. 18:
Iss.
1, Article 17.
Available at:
https://scholarship.claremont.edu/aliso/vol18/iss1/17
Rights Information
© 1999 Eric H. Roalson, J. Travis Columbus
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.