familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusDeschampsia
speciesDeschampsia cespitosa
subspeciesDeschampsia cespitosa subsp. holciformis

Deschampsia cespitosa subsp. holciformis

(J. Presl) W.E. Lawr.
Mary E. Barkworth
Treatment appears in FNA Volume 24. Treatment on page 628.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

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.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Deschampsia cespitosa subsp. holciformis"
RDF feed
2n chromosome quantity
26 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Adaxial cell presence
absent +
Adaxial cell shape
bulliform +
Adaxial ligule architecture or pubescence or shape
ciliate +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +  and scarious +
Anther quantity
3 +
Anther some measurement
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Apex architecture or relief
truncate-erose +
Apex architecture or shape
awned +
Apex shape
2-4-toothed +
Arm cell presence
absent +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
(J. Presl) W.E. Lawr. +
Awn architecture
twisted +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn atypical some measurement
0.5 cm5 mm <br />0.005 m <br /> (?) +
Awn course
straight +
Awn fixation
attached +
Awn orientation
arising +
Awn position
subapical +
Awn quantity
single +
Awn shape
geniculate +
Awn some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Back shape
keeled +  and rounded +
Basal floret quantity
1 +  and 2 +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
close +
Base fusion
free +
Base position
midlength +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade arrangement
parallel +
Blade arrangement or course or shape
linear +
Blade length
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Blade prominence
not evident +
Blade prominence or shape
flat +
Blade shape
rolled +  and folded +
Blade some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Branch arrangement
divergent +
Branch course
straight +  and slightly flexuous +
Branch orientation
ascending +
Branch shape
spikelike +
Callus development
developed +
Callus hair some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Callus pubescence
strigose +
Culm architecture
not rooting +
Culm architecture or arrangement or growth form
solitary +
Culm atypical some measurement
7 +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +
Culm some measurement
50 cm500 mm <br />0.5 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Wash. +, Va. +, Wis. +, W.Va. +, Conn. +, Mass. +, Maine +, N.H. +, N.Y. +, R.I. +, Vt. +, Wyo. +, N.J. +, N.Mex. +, N.C. +, Pa. +, Calif. +, Nev. +, Colo. +, Alaska +, Ill. +, Ind. +, Ariz. +, Idaho +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Md. +, Ohio +, Utah +, Minn. +, Mich. +, N.Dak. +, S.Dak. +, Mont. +, Ky. +  and Oreg. +
Embryo quantity
1/4 +
Endosperm texture
liquid +, soft +  and hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret atypical quantity
3 +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
1 +  and 2 +
Floret reproduction
viviparous +  and bisexual +
Floret shape
compressed +
Floret size
reduced +
Glume architecture
3-veined +  and 1-veined +
Glume architecture or shape
awned +
Glume coloration
purplish +
Glume height or length or size
shorter +
Glume length or size
shorter or longer +
Glume position
subtending +
Glume presence
absent +
Glume quantity
2 +
Glume shape
acute +  and lanceolate +
Glume size
subequal +  and unequal +
Glume variability
equal +
Hair shape
uncinate +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum shape
Ovate (?) +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Cindy Roché +
Inflorescence architecture
open +
Inflorescence condition or size
contracted +
Inflorescence position or structure subtype
terminal +
Internode architecture
hollow +
Internode presence
absent +
Keel pubescence or relief
scabrous +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Leaf position
basal +
Lemma architecture
(3)5-7-veined +
Lemma architecture or pubescence or relief
smooth +
Lemma architecture or shape
awned +
Lemma atypical some measurement
7 +
Lemma coloration
purplish +
Lemma coloration or density
purple +
Lemma height or length or size
shorter +
Lemma length or size
longer +
Lemma pubescence
glabrous +
Lemma reflectance
shiny +
Lemma shape
rounded +
Lemma some measurement
0.38 cm3.8 mm <br />0.0038 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Ligule presence
absent +
Ligule shape
obtuse +  and acute +
Ligule some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
Ligule texture
scarious +
Lodicule architecture
veined +
Lodicule architecture or pubescence or shape
ciliate +
Lodicule architecture or shape
entire +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lodicule shape
lanceolate +  and ovatelanceolate +
Lodicule texture
membranous +
Lower glume architecture
1-3-veined +
Lower glume architecture or shape
entire +
Lower glume some measurement
0.46 cm4.6 mm <br />0.0046 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
Midrib architecture
simple +
Midvein pubescence or relief
scabrous +
Midvein relief
scabridulous +, or +  and smooth +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea development
well-developed +
Palea height or length or size
shorter +
Palea presence
absent +
Palea shape
2-keeled +
Palea size
minute +
Panicle architecture
open +
Panicle atypical some measurement
40 cm400 mm <br />0.4 m <br /> (?) +
Panicle condition or size
contracted +
Panicle density
dense +
Panicle length
10cm +  and 25cm +
Panicle shape
ovate +  and pyramidal +
Panicle size
reduced +
Panicle some measurement
8 cm80 mm <br />0.08 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Panicle width
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Papilla presence
absent +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Pericarp width
thin +
Pseudopetiole development
not developed +
Pseudopetiole presence
absent +
Rachilla length
prolonged +
Rachilla pubescence
hairy +
Rachis prominence
evident +
Reference
None +
Rib quantity
5 +  and 11 +
Sheath architecture
open +
Sheath condition
closed +
Sheath length
open +
Sheath pubescence
glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 895.xml +
Spike architecture
ebracteate +
Spikelet arrangement
imbricate +
Spikelet fixation
attached +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
bisexual +  and viviparous +
Spikelet shape
compressed +, ovate +  and v-shaped +
Spikelet some measurement
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
simple +  and compound +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +  and 3 (?) +
Style quantity
2 +
Subsidiary-cell architecture
parallel-sided +
Surface quantity
0 (?) +  and 1/2 (?) +
Synonyms
Deschampsia caespitosa var. genuina +, Deschampsia caespitosa var. arctica +  and Deschampsia caespitosa +
Taxon family
Poaceae +
Taxon name
Deschampsia cespitosa subsp. holciformis +
Taxon parent
Deschampsia cespitosa +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tuft density
dense +
Tuft some measurement
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
Upper glume architecture
1-3-veined +
Upper glume shape
lanceolate +
Upper glume some measurement
0.45 cm4.5 mm <br />0.0045 m <br /> (0.56 cm5.6 mm <br />0.0056 m <br />) +
Vein arrangement
parallel +  and converging +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 24 +
Whole organism architecture
stoloniferous +  and rhizomatous +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
perennial +
Whole organism growth form
plant +  and cespitose +
Whole organism growth form or habitat
aquatic +  and terrestrial +
Whole organism pubescence
glaucous +
X chromosome quantity
7 +