Difference between revisions of "Deschampsia cespitosa subsp. holciformis"
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| − | |discussion=<p>Deschampsia cespitosa subsp. holciformis grows in coastal marshes and sandy soils, from the Queen Charlotte Islands, British Columbia, to central California. It intergrades and is interfertile with D. cespitosa subsp. beringensis, differing in its closed panicles, scabrous veins on the lower glumes, and more strongly imbricate spikelets. There are relatively few collections; it is not clear whether this reflects lack of collecting or rarity.</p> | + | |discussion=<p><i>Deschampsia cespitosa </i>subsp.<i> holciformis</i> grows in coastal marshes and sandy soils, from the Queen Charlotte Islands, British Columbia, to central California. It intergrades and is interfertile with <i>D. cespitosa </i>subsp.<i> beringensis</i>, differing in its closed panicles, scabrous veins on the lower glumes, and more strongly imbricate spikelets. There are relatively few collections; it is not clear whether this reflects lack of collecting or rarity.</p> |
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name=Deschampsia cespitosa subsp. holciformis | name=Deschampsia cespitosa subsp. holciformis | ||
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|authority=(J. Presl) W.E. Lawr. | |authority=(J. Presl) W.E. Lawr. | ||
|rank=subspecies | |rank=subspecies | ||
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|basionyms= | |basionyms= | ||
|family=Poaceae | |family=Poaceae | ||
| + | |illustrator=Cindy Roché | ||
| + | |illustration copyright=Utah State University | ||
|reference=None | |reference=None | ||
|publication title= | |publication title= | ||
|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_895.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Poeae | |tribe=Poaceae tribe Poeae | ||
Latest revision as of 16:25, 11 May 2021
Plants cespitose, sometimes glaucous. Culms 50-125 cm. Ligules 3-4.3 mm; blades 15-30 cm long, 1-4 mm wide when flat. Panicles 10-25 cm long, 3-8 cm wide, dense; primary and secondary branches appressed to ascending, scabridulous to densely scabrous. Spikelets 5.5-8 mm, usually strongly imbricate. Glumes usually exceeded by the distal floret, often purplish over more than 1/2 their area; lower glumes 4.6-5.8 mm, midveins scabrous distally; upper glumes 4.5-5.6 mm; callus hairs 1-2.3 mm; lemmas 3.8-4.5 mm, often purplish over more than 1/2 their area, awns 2-3 mm, straight to slightly geniculate, attached near or slightly above the middle of the lemma; anthers 2.5-3 mm. 2n = 26.
Discussion
Deschampsia cespitosa subsp. holciformis grows in coastal marshes and sandy soils, from the Queen Charlotte Islands, British Columbia, to central California. It intergrades and is interfertile with D. cespitosa subsp. beringensis, differing in its closed panicles, scabrous veins on the lower glumes, and more strongly imbricate spikelets. There are relatively few collections; it is not clear whether this reflects lack of collecting or rarity.
Selected References
None.