Home Page; Intermountain Herbarium; Manual
of Grasses for North America; Stipeae
This page: Generic Description; List of taxa and their distribution; reproductive characteristics
|This page, and its subsidiary pages, are being developed primarily as a place to store available information about Pseudoroegneria; they do not reflect research that I have done. Anyone is welcome to use the information. In the old days, notes such as these would have been stored in a file cabinet, not made publicly available. I am placing them on the Web for my convenience; if you find them useful, great. I welcome comments and pertinent reprints and will try to incorporate them into the site, with appropriate credits as time permits. Since writing that, Dr. Bjorn Salomon has kindly sent additional information.|
Plants cespitose, sometimes densely so, sometimes shortly rhizomatous. Culms 30-90 cm tall. Leaves flat or convolute. Spikes with widely spaced, solitary spikelets; rachises nearly glabrous or scabridulous, internodes concave adjacent to the spikelets. Spikelets with 3-5 florets, appressed. Glumes 5-8 mm, lanceolate or narrowly lanceolate, acuminate, glabrous, 5-7-veined, midveins sometimes scabridulous distally, apices subacute, acuminate, obtuse, or truncate; lemmas usually glabrous, linear-lanceolate, scabrous, unawned or awned, awns 8-30 mm, strongly divergent at maturity; paleas equal to the lemmas, margins and distal portion of the keels often ciliate; anthers 4-7 mm; rachillae glabrous. Haplome St; diploids and tetraploids known.
Warning! The genomic composition of many of these entities has been inferred, not determined. Eventually I plan to find out, and add to these pages, for which species it is known - and whether known via cytology or DNA analysis. If sending me information, please cite the relevant publication.
Species of Pseudoroegneria are, in general, out-crossing and self-incompatible. They also have an astounding ability to distribute and accept pollen, from their own and other species. Unfortunately, 'other' species does not mean just other species of Pseudoroegneria. This, combined with their self-incompatibility, presents major obstacles to the development of 'pure' lines as well as the maintenance of genebank accessions.
The following table is based on Löve
(1984). Pseudoroegneria strigosa is the type species;
hence its distinctive color in this table.