Difference between revisions of "Puccinellia howellii"

J.I. Davis
Common names: Howell's alkali grass
Treatment appears in FNA Volume 24. Treatment on page 475.
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name=Puccinellia howellii
 
name=Puccinellia howellii
|author=
 
 
|authority=J.I. Davis
 
|authority=J.I. Davis
 
|rank=species
 
|rank=species
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|basionyms=
 
|basionyms=
 
|family=Poaceae
 
|family=Poaceae
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|illustrator=Cindy Roché
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|illustration copyright=Utah State University
 
|distribution=Calif.
 
|distribution=Calif.
 
|reference=None
 
|reference=None
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V24/V24_680.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_680.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Poeae
 
|tribe=Poaceae tribe Poeae

Latest revision as of 16:24, 11 May 2021

Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; cespitose, not mat-forming. Culms 7-40 cm, erect to ascending. Ligules 1.5-2.7 mm, obtuse, entire or minutely and irregularly serrate; blades involute, 1.4-2.2 mm wide when flattened. Panicles 2-13 cm, compact to diffuse at maturity, lower branches erect to descending, spikelet-bearing from near the base or confined to the distal 1/2; pedicels smooth or with a few scattered scabrules, sometimes with tumid epidermal cells. Spikelets 3-8 mm, with (1)2-5 florets. Glumes rounded or weakly keeled over the back, veins obscure, apices acute to obtuse; lower glumes 0.8-1.9 mm; upper glumes 1.7-2.5 mm; calluses with a few hairs; lemmas 2.4-3.3 mm, herbaceous, glabrous or with a few hairs near the base, principally along the veins, backs rounded or weakly keeled distally, 5-veined, veins obscure, not extending to the margins, apical margins uniformly and densely scabrous, apices acute to obtuse, entire; palea veins smooth and glabrous proximally, smooth or scabrous distally; anthers 1.5-2 mm. 2n = unknown.

Discussion

Puccinellia howellii is known only from the type locality in Shasta County, California, where it is a dominant element of the vegetation associated with a group of three mineralized seeps. Isozyme profiles suggest that it is a polyploid.

Selected References

None.

Lower Taxa

None.