familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusPoa
subgenusPoa subg. Poa
sectionPoa sect. Oreinos
speciesPoa laxa
subspeciesPoa laxa subsp. banffiana

Poa laxa subsp. banffiana

Soreng
Robert J. Soreng
Endemic
Treatment appears in FNA Volume 24. Treatment on page 570.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Basal branching mainly extravaginal. Blades thin, Panicles 2-8 cm, lax, loosely contracted, sparse, with 2-3 (5) branches per node; branches steeply ascending, fairly straight, usually sparsely scabrous, infrequently smooth. Glumes lanceolate to broadly lanceolate; lower glumes 3-veined; calluses glabrous; lemmas with keels short-villous for at least 1/2 their length, usually the lateral-veins on at least 1 side of some florets sparsely softly puberulent, infrequently all the lateral-veins glabrous; anthers 0.8-1.1 mm. 2n = 84.

Discussion

Poa laxa subsp. banffiana grows primarily in mesic alpine locations of the Rocky Mountains in Canada and the United States. It is sometimes difficult to distinguish from P. glauca (p. 576).

Selected References

None.

Lower Taxa

None.

"thin" is not a number.No values specified."decumbent" is not a number."/2" is not declared as a valid unit of measurement for this property.

... more about "Poa laxa subsp. banffiana"
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2n chromosome quantity
84 +
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 architecture
prow-tipped +
Adaxial surface architecture or pubescence or relief
smooth +
Adaxial surface pubescence
puberulent +, hispidulous +, hairy +  and glabrous +
Adaxial surface pubescence or relief
scabrous +
Anther atypical quantity
1 (?) +  and 2 (?) +
Anther atypical some measurement
1.3 cm13 mm <br />0.013 m <br /> (?) +
Anther quantity
3 +
Anther some measurement
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Apex coloration
scarious-hyaline +
Apex shape
lacerate +  and obtuse +
Arm cell presence
absent +
Auricle presence
absent +
Author
Robert J. Soreng +
Authority
Soreng +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn course
straight +
Awn orientation
arising +
Awn position
basal +  and terminal +
Awn quantity
single +
Awn shape
bent +
Back shape
keeled +  and rounded +
Basal floret quantity
1 +  and 2 +
Basal sheath pubescence
strigose +  and glabrous +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
close +
Base fusion
free +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade architecture or pubescence or relief
smooth +
Blade arrangement
parallel +
Blade arrangement or course or shape
linear +
Blade prominence
not evident +
Blade pubescence or relief
scabrous +
Blade shape
involute +, folded +  and flat +
Branch architecture
sulcate +
Branch atypical quantity
5 (?) +
Branch course
straight +
Branch orientation
ascending +
Branch pubescence
hispidulous +, glabrous +, smooth or +  and sparsely densely scabrous +
Branch pubescence or relief
scabrous +
Branch quantity
2;3 +
Branch shape
angled +
Branch size
slender +
Branch some measurement
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Callus development
developed +
Callus pubescence
glabrous +
Callus shape
compressed +  and terete +
Culm architecture
unbranched +  and hollow +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm fragility
weak +
Culm fragility or size
stout +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm height
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Culm orientation
ascending +  and erect +
Culm shape
terete +
Culm size
slender +
Culm some measurement
6 cm60 mm <br />0.06 m <br /> (18 cm180 mm <br />0.18 m <br />) +
Culm texture
not woody +
Culm thickness
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Distal floret size
reduced +
Distribution
Ill. +, Ind. +, Conn. +, N.J. +, N.Y. +, Ga. +, Wash. +, Utah +, Alaska +, Colo. +, Idaho +, N.Mex. +, Nev. +, Maine +, N.H. +, Vt. +, Del. +, D.C +, Wis. +, Iowa +, Mont. +, Oreg. +, Wyo. +, Pacific Islands (Hawaii) +, Md. +, Mass. +, R.I. +, Fla. +, Calif. +, W.Va. +, Tex. +, La. +, N.C. +, N.Dak. +, Nebr. +, Tenn. +, Ala. +, Ark. +, Ariz. +, Kans. +, Ky. +, Mich. +, Minn. +, Mo. +, Miss. +, Ohio +, Okla. +, Pa. +, Puerto Rico +, S.C. +, S.Dak. +, Va. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +  and Yukon +
Embryo quantity
1/4 +  and 1/3 +
Endosperm texture
liquid +, soft +  and hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret atypical quantity
13 +  and 1 +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
2 +  and 5 +
Floret reproduction
bisexual +
Floret shape
compressed +
Floret size
reduced +
Glume architecture
1-3(5)-veined +
Glume architecture or pubescence or relief
smooth +
Glume architecture or shape
awned +
Glume height or length or size
shorter +
Glume length or size
shorter or longer +
Glume position
subtending +
Glume presence
absent +
Glume pubescence or relief
scabrous +
Glume quantity
2 +
Glume shape
lanceolate +  and broadly lanceolate +
Glume size
unequal +
Glume variability
equal +
Glume width
thin +
Hair arrangement
distributed +
Hair shape
uncinate +
Hair some measurement
0.1 cm1 mm <br />0.001 m <br /> (?) +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum position
subbasal +
Hilum quantity
0 +  and 1/6 +
Hilum shape
Oval (?) +  and Round (?) +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Sandy Long +
Inflorescence architecture
compound +
Inflorescence position or structure subtype
terminal +
Inflorescence shape
racemelike +
Inflorescence size
reduced +
Intercostal region architecture
5-7(11)-veined +
Intercostal region coloration
milky white +  and slightly greenish +
Intercostal region pubescence
glabrous +
Internode architecture
hollow +
Internode presence
absent +
Keel architecture or pubescence or relief
smooth +
Keel pubescence
short-villous +
Keel pubescence or relief
scabrous +
Keel quantity
1/3 +  and 1/2 +
Lateral-vein prominence
prominent +  and obscure +
Lateral-vein pubescence
glabrous +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
5(7-11)-veined +
Lemma architecture or shape
awned +
Lemma arrangement
adjacent +
Lemma height or length or size
shorter +
Lemma length or size
longer +
Lemma position relational
exceeding +
Lemma pubescence
hairy +, glabrous +  and chartaceous +
Lemma shape
keeled +  and lanceolate +
Lemma some measurement
0.37 cm3.7 mm <br />0.0037 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Lemma texture
membranous +
Lemma width
thin +
Ligule architecture
erose +  and entire +
Ligule atypical some measurement
6 +
Ligule coloration
white +  and milky white or hyaline +
Ligule presence
absent +
Ligule pubescence
ciliolate +  and smooth +
Ligule shape
lacerate +, truncate +  and acute +
Ligule some measurement
0.125 cm1.25 mm <br />0.00125 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Ligule texture
membranous +
Lodicule architecture
veined +
Lodicule architecture or pubescence or shape
ciliate +
Lodicule architecture or shape
truncate +
Lodicule prominence
inconspicuous +
Lodicule pubescence
glabrous +
Lodicule quantity
2 +
Lodicule shape
lobed +  and lanceolate +
Lodicule texture
membranous +
Lower glume architecture
3-veined +
Lower glume width
0.75mm +  and 1.05mm +
Lower internode some measurement
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Margin character
length +
Margin coloration
milky white +  and slightly greenish +
Margin pubescence
glabrous +, scabrous +  and smooth +
Marginal vein pubescence
long-villous +
Midrib architecture
simple +
Node position
exserted +
Node prominence
concealed +  and prominent +
Node quantity
0 +  and 5 +
Node shape
terete +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea development
well-developed +
Palea presence
absent +
Palea quantity
2/3 +
Palea shape
2-keeled +
Palea size
subequal +
Panicle architecture
open +
Panicle architecture or arrangement
lax +
Panicle condition or size
contracted +
Panicle density
dense +  and moderately dense +
Panicle orientation
erect +  and nodding +
Panicle shape
ovoid +
Panicle size
reduced +
Panicle some measurement
2 cm20 mm <br />0.02 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 internode pubescence
glabrous +
Rachilla length
prolonged +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath architecture or pubescence or relief
smooth +
Sheath condition
closed +
Sheath length
closed +
Sheath pubescence or relief
scabrous +
Sheath shape
terete +
Side pubescence
puberulent +
Side quantity
1 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 797.xml +
Special status
Endemic +
Spike architecture
ebracteate +
Spikelet architecture
not bulbiferous +
Spikelet arrangement
mixed +
Spikelet fixation
attached +
Spikelet pubescence
webbed +
Spikelet quantity
1 +  and 15 +
Spikelet reproduction
viviparous +
Spikelet shape
compressed +
Spikelet some measurement
0.32 cm3.2 mm <br />0.0032 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 +
Synonyms
Gramineae +
Taxon family
Poaceae +
Taxon name
Poa laxa subsp. banffiana +
Taxon parent
Poa laxa +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tuft quantity
1 +
Upper glume length
0.37 cm3.7 mm <br />0.0037 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
Upper glume width
0.9mm +  and 1.3mm +
Vein arrangement
parallel +  and converging +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 24 +
Whole-organism architecture
branching +
Whole organism architecture
branching +, not rhizomatous +  and not stoloniferous +
Whole organism arrangement
mixed +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
perennial +
Whole organism growth form
plant +
Whole organism growth form or habitat
aquatic +  and terrestrial +
Whole organism pubescence
glaucous +
Whole organism reproduction
unisexual +
X chromosome quantity
7 +