familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusCalamagrostis
speciesCalamagrostis porteri
subspeciesCalamagrostis porteri subsp. porteri

Calamagrostis porteri subsp. porteri

Kendrick L. Marr, Richard J. Hebda, Craig W. Greenef
Treatment appears in FNA Volume 24. Treatment on page 723.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché, Hana Pazdírková

Copyright: Utah State University

Culms (60) 75-100 cm. Sheaths smooth or slightly scabrous; collars usually with prominent tufts of hair, rarely glabrous; ligules (1) 2-5 (6) mm; blades 8-40 cm long, (2) 3-6 (8) mm wide, abaxial surfaces darker green than the adaxial surfaces, adaxial surfaces light green, glaucous. Panicles (5) 10-12 (15) cm long, 0.8-3 (7) cm wide; branches (1.5) 2-5 cm. Spikelets 4-5 mm; rachilla prolongations with 1.5-2 (3.5) mm hairs. Callus hairs 1.5-2 mm, 0.4-0.6 times as long as the lemmas; lemmas 3.5-4.5 mm, 0.5-1.5 mm shorter than the glumes; awns 3-4 (4.5) mm, attached to the lower 1/10 – 1/5 of the lemmas; anthers about 2 mm. 2n = 84-±104.

Discussion

Calamagrostis porteri subsp. porteri grows from New York to Virginia, Tennessee, and Kentucky. One specimen from Claiborne County, Tennessee, lacks hairs around the collar, but the leaves are glaucous on both surfaces. There are other specimens from this county that have hairy collars.

Calamagrostis porteri subsp. porteri appears to form hybrids with the nearly sympatric C. canadensis (p. 726) in rocky wooded sites in central Virginia. These putative hybrids have hairy collars, relatively long callus hairs, and short awns.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Calamagrostis porteri subsp. porteri"
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2n chromosome quantity
104 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Abaxial surface architecture or pubescence or relief
smooth +
Abaxial surface coloration
darker green +
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 architecture or pubescence or relief
smooth +
Adaxial surface coloration
light green +
Adaxial surface pubescence
glaucous +
Adaxial surface pubescence or relief
scabrous +
Anther quantity
3 +
Anther some measurement
2 cm20 mm <br />0.02 m <br /> (?) +
Apex architecture
awn-tipped +
Apex architecture or shape
awned +
Apex shape
acute +  and acuminate +
Arm cell presence
absent +
Auricle presence
absent +
Author
Kendrick L. Marr +, Richard J. Hebda +  and Craig W. Greenef +
Authority
A. Gray +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn atypical some measurement
4.5 cm45 mm <br />0.045 m <br /> (?) +
Awn course
straight +
Awn fixation
attached +
Awn fragility
delicate +
Awn fragility or size
stout +
Awn orientation
arising +
Awn position
lower +
Awn prominence
distinguished +
Awn quantity
1/10 +  and 1/5 +
Awn shape
bent +
Awn some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 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
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 length
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Blade prominence
not evident +
Blade prominence or shape
flat +
Blade pubescence or relief
scabrous +
Blade shape
flat +  and involute +
Blade width
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Branch atypical some measurement
1.5 cm15 mm <br />0.015 m <br /> (?) +
Branch orientation
appressed;more or less drooping +
Branch pubescence or relief
scabrous +
Branch shape
spikelike +
Branch some measurement
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Callus development
developed +
Callus hair atypical some measurement
3 +
Callus hair length
0.4-0.6 times as long as the lemmas +
Callus hair some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Callus pubescence
hairy +
Collar pubescence
glabrous +
Culm architecture
unbranched +
Culm architecture or arrangement or growth form
solitary +
Culm architecture or pubescence or relief
smooth +
Culm atypical some measurement
60 +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
ascending +  and erect +
Culm pubescence or relief
scabrous +
Culm reproduction
sterile +
Culm some measurement
75 cm750 mm <br />0.75 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Md. +, W.Va. +, Pa. +, Ohio +, Mo. +, N.C. +, Tenn. +, Va. +, N.Y. +, Ark. +, Ill. +, Ga. +, Ind. +  and Ky. +
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
2 +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
1 +
Floret reproduction
sterile +  and bisexual +
Floret shape
compressed +
Floret size
reduced +
Glume architecture or shape
awned +
Glume height or length or size
shorter +
Glume length or size
longer +
Glume position
subtending +
Glume presence
absent +
Glume quantity
2 +
Glume shape
rounded +  and slightly keeled +
Glume size
subequal +
Glume texture
membranous +
Glume variability
equal +
Hair atypical some measurement
3.5 cm35 mm <br />0.035 m <br /> (?) +
Hair quantity
sparse +  and abundant +
Hair shape
uncinate +
Hair some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 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 Hana Pazdírková +
Inflorescence architecture
compound +
Inflorescence position or structure subtype
terminal +
Inflorescences panicle architecture
open +
Inflorescences panicle shape
spikelike +
Internode architecture
hollow +
Internode presence
absent +
Keel pubescence or relief
scabrous +
Lateral-vein prominence
not raised +, obscure +  and slightly prominent +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
3(5)-veined +
Lemma architecture or pubescence or relief
smooth +
Lemma architecture or shape
awned +
Lemma atypical some measurement
2 +
Lemma height or length or size
shorter +
Lemma length or size
longer +
Lemma pubescence or relief
scabrous +
Lemma shape
lanceolate +  and ovate +
Lemma some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Ligule atypical some measurement
1 +
Ligule presence
absent +
Ligule shape
truncate +  and obtuse entire or lacerate +
Ligule some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ligule texture
membranous +
Lodicule architecture
veined +
Lodicule architecture or pubescence or shape
ciliate +
Lodicule architecture or shape
truncate +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lodicule shape
lanceolate +
Lodicule texture
membranous +
Lower glume architecture
1(3)-veined +
Midrib architecture
simple +
Node atypical quantity
5 (?) +
Node prominence
concealed +  and prominent +
Node quantity
2 +  and 4 +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
hairy +  and glabrous +
Palea architecture
2-veined +
Palea development
developed +
Palea presence
absent +
Palea shape
2-keeled +
Palea size
minute +
Palea width
thin +
Panicle architecture
open +
Panicle coloration
green +  and pale-purple +
Panicle condition or size
contracted +
Panicle length
10cm +  and 12cm +
Panicle orientation
erect +  and nodding +
Panicle shape
spikelike +
Panicle size
reduced +
Panicle width
0.8 cm8 mm <br />0.008 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Papilla presence
absent +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Pericarp width
thin +
Projection shape
bent +
Pseudopetiole development
not developed +
Pseudopetiole presence
absent +
Rachilla length
prolonged +
Rachilla pubescence
hairy +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath architecture or pubescence or relief
smooth +
Sheath condition
closed +
Sheath length
open +
Sheath pubescence or relief
scabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 1021.xml +
Special status
Endemic +
Spike architecture
ebracteate +
Spikelet architecture
pedicellate +
Spikelet arrangement
mixed +
Spikelet atypical some measurement
6 +
Spikelet fixation
attached +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
viviparous +
Spikelet shape
compressed +
Spikelet some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 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
Calamagrostis porteri subsp. porteri +
Taxon parent
Calamagrostis porteri +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tooth quantity
4 (?) +
Tuft prominence
prominent +
Upper glume architecture
3-veined +
Vein arrangement
parallel +  and converging +
Vein presence
absent +
Vein prominence
obscure +  and prominent +
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 +  and cespitose +
Whole organism growth form or habitat
aquatic +  and terrestrial +
Whole organism thickness
0.5mm +  and 1mm +
X chromosome quantity
7 +