familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Stipeae
genusHesperostipa
speciesHesperostipa comata
subspeciesHesperostipa comata subsp. comata

Hesperostipa comata subsp. comata

Mary E. Barkworth
Treatment appears in FNA Volume 24. Treatment on page 158.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché, Annaliese Miller

Copyright: Utah State University

Lower cauline nodes usually concealed by the sheaths. Panicles often partially included in the uppermost sheath at maturity. Awns 75-225 mm, terminal segment 40-120 mm, sinuous to curled. 2n = 38, 44, 46.

Discussion

Hesperostipa comata subsp. comata grows on well-drained soils of cool deserts, grasslands, and sagebrush associations, at elevations of 200-2500 m. It is widespread and often abundant in western and central North America, particularly in disturbed areas. It is similar to H. neomexicana, differing primarily in having awns that are either not hairy or have hairs that are no more than 0.5 mm long, and in having thinner, longer ligules. Intermediates to H. neomexicana exist but are not common.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."prolonged" is not a number.

... more about "Hesperostipa comata subsp. comata"
RDF feed
2n chromosome quantity
46 +, 44 +  and 38 +
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 +
Adaxial surface shape
ridged +
Anther quantity
3 +
Anther some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Apex architecture
prow-tipped +
Apex architecture or shape
awned +, bifid +, bilobed +  and entire +
Apex shape
not sharp +  and acute +
Apex texture
indurate +
Arm cell presence
absent +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
(Trin. & Rupr.) Barkworth +
Awn architecture
twisted +  and not branched +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn position
subterminal +  and eccentric +
Awn position or structure subtype
terminal +
Awn pubescence
scabrous +  and pilose +
Awn quantity
2 +
Awn some measurement
7.5 cm75 mm <br />0.075 m <br /> (22.5 cm225 mm <br />0.225 m <br />) +
Axillary panicle position
concealing +
Back shape
keeled +  and rounded +
Basal floret quantity
1 +  and 2 +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
close +
Base fusion
fused +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade arrangement
parallel +
Blade arrangement or course or shape
linear +
Blade length
4 cm40 mm <br />0.04 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Blade prominence
not evident +
Blade shape
cross +, linear +  and narrowly lanceolate +
Blade shape or vernation
involute +
Blade width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Branch quantity
many;1 +
Branch shape
spikelike +
Callus development
well-developed +
Callus pubescence
strigose +
Callus shape
sharp +
Callus some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Culm architecture
not branching +
Culm architecture or arrangement or growth form
solitary +
Culm duration
perennial +  and annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +
Culm some measurement
12 cm120 mm <br />0.12 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Wash. +, Wis. +, Wyo. +, N.Mex. +, Tex. +, Ill. +, Ind. +, Kans. +, N.Dak. +, N.Y. +, Okla. +, R.I. +, S.Dak. +, Nev. +, Colo. +, Calif. +, Nebr. +, Mont. +, Oreg. +, Iowa +, Ariz. +, Idaho +, Utah +, Minn. +, Mich. +, Alta. +, B.C. +, Man. +, Ont. +, Sask. +  and Yukon +
Embryo quantity
0 +  and 1/3 +
Endosperm texture
liquid +, soft +  and hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret length or size
sometimes longer +
Floret pubescence
hairy +
Floret quantity
1 +
Floret reproduction
sexual +
Floret shape
cylindrical +
Floret some measurement
7mm +  and 13mm +
Glume architecture
3-5-veined +
Glume architecture or shape
awned +
Glume coloration
hyaline +
Glume fragility
pliable +
Glume length
15mm +  and 60mm +
Glume position
subtending +
Glume presence
absent +
Glume quantity
1/4 +
Glume shape
tapering +
Glume some measurement
1.6 cm16 mm <br />0.016 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Glume texture
membranous +
Glume width
2mm +  and 4mm +
Hair coloration
white +
Hair pubescence
glabrous +
Hair shape
uncinate +
Hair some measurement
1 cm10 mm <br />0.01 m <br /> (1 cm10 mm <br />0.01 m <br />) +
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 +  and Annaliese Miller +
Inflorescence architecture
open +
Inflorescence condition or size
contracted +
Inflorescence position or structure subtype
terminal +
Inflorescence size
reduced +
Internode architecture
solid +  and hollow +
Internode presence
absent +
Layer presence
absent +
Leaf arrangement
basally concentrated +  and evenly distributed +
Leaf arrangement or density
concentrated +
Leaf ligule some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
3-5-veined +
Lemma architecture or pubescence or relief
smooth +
Lemma architecture or shape
not +  and awned +
Lemma pubescence
pubescent +
Lemma shape
ovate +, rectangular +  and lanceolate +
Lemma texture
indurate +
Ligule architecture or pubescence or shape
ciliate +
Ligule presence
absent +
Ligule texture
membranous +
Lodicule architecture
veined +
Lodicule architecture or pubescence or shape
ciliate +
Lodicule architecture or shape
truncate +
Lodicule prominence
inconspicuous +
Lodicule quantity
3 +  and 2 +
Lodicule shape
lanceolate +
Lodicule texture
fleshy +  and membranous +
Lower glume some measurement
1.8 cm18 mm <br />0.018 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Lower node pubescence
pubescent +  and glabrous +
Lower sheath pubescence
pubescent +  and glabrous +
Margin architecture or pubescence or shape
ciliate +
Margin architecture or shape
awned +
Margin arrangement
overlapping +
Margin prominence or shape
flat +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
pubescent +  and glabrous +
Palea architecture
2-veined +
Palea development
well-developed +
Palea presence
absent +
Palea pubescence
pubescent +
Palea shape
keeled +
Palea size
reduced +
Palea texture
coriaceous +
Palea variability
equal +
Panicle condition or size
contracted +
Panicle development
developing +
Panicle some measurement
10 cm100 mm <br />0.1 m <br /> (32 cm320 mm <br />0.32 m <br />) +
Papilla presence
absent +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Pericarp width
thin +
Pseudopetiole presence
absent +
Rachilla length
not prolonged +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath architecture or pubescence or relief
smooth +
Sheath condition
closed +
Sheath length
full +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 218.xml +
Spike architecture
ebracteate +
Spikelet arrangement
mixed +
Spikelet fixation
attached +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
unisexual +  and bisexual +
Spikelet shape
laterally compressed +  and terete +
Spikelet some measurement
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 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 +
Synonyms
Stipa comata subsp. intonsa +  and Stipa comata +
Taxon family
Poaceae +
Taxon name
Hesperostipa comata subsp. comata +
Taxon parent
Hesperostipa comata +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper glume height or length or size
shorter +
Upper glume some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Vein presence
absent +
Vein prominence
inconspicuous +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 24 +
Whole organism architecture
not 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 +
X chromosome quantity
11 +