familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusPoa
subgenusPoa subg. Poa
sectionPoa sect. Madropoa
subsectionPoa subsect. Madropoa
speciesPoa fendleriana
subspeciesPoa fendleriana subsp. albescens

Poa fendleriana subsp. albescens

(Hitchc.) Soreng
Robert J. Soreng
Treatment appears in FNA Volume 24. Treatment on page 556.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Collars often scabrous or hispidulous near the throat; ligules of middle cauline leaves 0.2-1.5 mm, smooth or scabrous, margins not decurrent, apices truncate, scabrous, ciliolate, or glabrous; innovation blades frequently glabrous adaxially. Rachilla internodes smooth, glabrous. Lemmas glabrous or the keels and marginal veins sparsely short-villous to softly puberulent. 2n = 28+11, 56.

Discussion

Poa fendleriana subsp. albescens is endemic to the northern Sierra Madre Occidental, extending from the southwestern United States to Chihuahua and Sonora, Mexico. It grows mainly in upland forest openings. It intergrades with subsp. fendleriana where sexual populations have come into contact. Intermediate, pistillate populations with sparsely hairy lemmas are common in southeastern Arizona, and infrequent in southwestern New Mexico.

Selected References

None.

Lower Taxa

None.

"thin" is not a number."reduced" is not a number.No values specified."decumbent" is not a number.

... more about "Poa fendleriana subsp. albescens"
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2n chromosome quantity
56 +  and 11 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Abaxial surface architecture or pubescence or relief
smooth +
Abaxial surface pubescence or relief
scabrous +
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 pubescence
hairy +, hispidulous +  and scabrous +
Anther atypical quantity
1 (?) +  and 2 (?) +
Anther atypical some measurement
5 cm50 mm <br />0.05 m <br /> (?) +
Anther quantity
3 +
Anther some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Apex architecture or shape
truncate +
Apex coloration
scarious-hyaline +
Apex length
reduced +
Apex pubescence
glabrous +, ciliolate +  and scabrous +
Apex shape
acute +, prow--shaped +, truncate +  and acuminate +
Arm cell presence
absent +
Auricle presence
absent +
Author
Robert J. Soreng +
Authority
(Hitchc.) 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 growth form or orientation
decumbent +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base pubescence
glabrous +
Base shape
compressed +  and terete +
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 orientation
erect +
Branch pubescence
hispidulous +, glabrous +, scabrous +  and smooth +
Branch pubescence or relief
scabrous +
Branch quantity
1;2 +
Branch shape
terete +  and weakly angled +
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 +
Cauline blade shape
folded +  and flat +
Cauline blade shape or vernation
involute +
Cauline blade texture
firm +
Collar pubescence
hispidulous +  and scabrous +
Culm architecture
unbranched +  and hollow +
Culm architecture or arrangement or growth form
solitary +
Culm atypical some measurement
5 +
Culm duration
annual +
Culm fragility or size
stout +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +
Culm shape
compressed +  and terete +
Culm some measurement
15 cm150 mm <br />0.15 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Colo. +, Ariz. +, Idaho +, Mont. +, N.Mex. +, Nev. +, Okla. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wyo. +, Tex. +, Alta. +, B.C. +, Man. +, Calif. +, Nebr. +  and N.Dak. +
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 +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
2 +  and 7 +
Floret reproduction
sexual +
Floret shape
compressed +
Floret size
reduced +
Floret some measurement
2mm +  and 10mm +
Floret variability
normal +
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
keeled +  and lanceolate +
Glume size
unequal +
Glume variability
equal +
Hair arrangement
distributed +
Hair shape
uncinate +
Hair some measurement
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 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 +
Innovation blade pubescence
glabrous +
Intercostal region architecture
5-7(11)-veined +
Intercostal region coloration
milky white +  and slightly greenish +
Intercostal region pubescence
scabrous +, smooth +, glabrous +  and puberulent +
Internode architecture
hollow +
Internode presence
absent +
Keel architecture or pubescence or relief
smooth +
Keel pubescence
sparsely short-villous +  and softly puberulent +
Keel pubescence or relief
scabrous +
Lateral-vein prominence
prominent +
Lateral-vein pubescence
puberulent +, long-villous +  and glabrous +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf ligule some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
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
glabrous +
Lemma shape
keeled +  and lanceolate +
Lemma some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Lemma texture
membranous +
Ligule architecture
erose +  and entire +
Ligule coloration
colorless +  and milky white +
Ligule presence
absent +
Ligule pubescence
ciliolate +
Ligule shape
not +  and decurrent +
Ligule some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (1.8 cm18 mm <br />0.018 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
1-3-veined +
Lower glume height or length or size
distinctly shorter +
Lower glume quantity
1 +
Margin character
length +
Margin coloration
milky white +  and slightly greenish +
Margin pubescence
glabrous +
Margin shape
not decurrent +
Marginal vein pubescence
sparsely short-villous +  and softly puberulent +
Midrib architecture
simple +
Node position
exserted +
Node prominence
concealed +  and prominent +
Node quantity
0 +  and 1 +
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
congested +
Panicle atypical some measurement
30 cm300 mm <br />0.3 m <br /> (?) +
Panicle condition or size
contracted +
Panicle orientation
erect +
Panicle shape
narrowly lanceoloid +  and ovoid +
Panicle size
reduced +
Panicle some measurement
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 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 condition
closed +
Sheath length
closed +
Sheath pubescence
pubescent +, glabrous +, scabrous +  and smooth +
Sheath shape
terete +
Shoot architecture
rhizomatous +  and stoloniferous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 777.xml +
Spike architecture
ebracteate +
Spikelet architecture
not bulbiferous +
Spikelet arrangement
mixed +
Spikelet atypical quantity
25 (?) +
Spikelet atypical some measurement
3 +
Spikelet fixation
attached +
Spikelet growth form
dimorphic +
Spikelet quantity
3 +  and 15 +
Spikelet reproduction
viviparous +
Spikelet shape
compressed +, broadly lanceolate +  and ovate +
Spikelet some measurement
0.4 cm4 mm <br />0.004 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 fendleriana subsp. albescens +
Taxon parent
Poa fendleriana +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tuft quantity
1 +
Upper glume architecture
5-veined +  and 3-veined +
Vein arrangement
parallel +  and converging +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 24 +
Whole organism architecture
rhizomatous +
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 height or length or size
short +
Whole organism reproduction
unisexual +
X chromosome quantity
7 +