familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Stipeae
genusAchnatherum
speciesAchnatherum nelsonii
subspeciesAchnatherum nelsonii subsp. dorei

Achnatherum nelsonii subsp. dorei

(Barkworth & J.R. Maze) Barkworth
Mary E. Barkworth
Common names: Dore's needlegrass
Endemic
Synonyms: Stipa nelsonii var. dorei Stipa nelsonii subsp. dorei
Treatment appears in FNA Volume 24. Treatment on page 124.
Revision as of 01:47, 30 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Calluses blunt, glabrous tips 0.02-0.06 mm, dorsal boundary of the glabrous tip and the callus hairs almost straight to rounded; awns 19-31 mm.

Discussion

Achnatherum nelsonii subsp. dorei grows from the southern Yukon Territory to California and Wyoming. In regions where both subspecies grow, subsp. dorei is at higher elevations than subsp. nelsonii. It differs from A. rohustum in the sparsely hairy collars of its flag leaves.

Reports of Achnatherum nelsonii subsp. dorei (identified as Stipa columbiana Macoun by many authors) from New Mexico and Arizona are probably based on A. perplexum, which differs in having sparse, narrow inflorescences and slightly recurved glumes. The two also differ in flowering time, A. nelsonii subsp. dorei flowering in late spring to early summer and A. perplexum in the fall. Achnatherum nelsonii subsp. nelsonii is present in New Mexico. Scagel and Maze (1984) concluded that putative hybrids between A. nelsonii subsp. dorei and A. richardsonii were merely large plants of A. nelsonii subsp. dorei that varied in the direction of A. richardsonii.

Selected References

None.

Lower Taxa

None.

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

... more about "Achnatherum nelsonii subsp. dorei"
RDF feed
2n chromosome quantity
44 +  and 36 +
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 dehiscence
dehiscent +
Anther quantity
3 +
Anther shape
not penicillate +
Anther some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Apex architecture or shape
awned +, bifid +, bilobed +  and entire +
Apex fragility
pliable +
Apex shape
rounded +  and acute +
Apex some measurement
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Apical hair some measurement
0 cm0 mm <br />0 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Arm cell presence
absent +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
(Barkworth & J.R. Maze) Barkworth +
Awn architecture
twisted +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn course
flexuous +
Awn orientation
arising +
Awn position
subterminal +  and eccentric +
Awn position or structure subtype
terminal +
Awn pubescence
hairy +
Awn quantity
single +
Awn relief
usually scabrous +  and scabridulous +
Awn shape
not once-geniculate +
Awn some measurement
1.9 cm19 mm <br />0.019 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
Axillary panicle position
concealing +
Back shape
keeled +  and rounded +
Basal floret quantity
1 +  and 2 +
Basal sheath pubescence
glabrous or +  and sparsely densely pubescent +
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 prominence
not evident +
Blade shape
involute +, convolute +  and flat +
Blade width
0.12 cm1.2 mm <br />0.0012 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Branch course
straight +
Branch fusion
fused +
Branch orientation
ascending;appressed +
Branch quantity
many;1 +
Branch shape
spikelike +
Callus development
well-developed +
Callus pubescence
strigose +
Callus shape
blunt +
Callus some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Cleistogene presence
not absent +
Collar pubescence
pubescent +  and glabrous +
Common name
Dore's needlegrass +
Culm architecture
branching +  and 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 height
40 cm400 mm <br />0.4 m <br /> (175 cm1,750 mm <br />1.75 m <br />) +
Culm orientation
erect +
Culm position
intravaginal +  and basal +
Culm some measurement
10 cm100 mm <br />0.1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
Culm texture
not woody +
Culm thickness
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Distal floret size
reduced +
Distribution
Ariz. +, Colo. +, N.Mex. +, Tex. +, Utah +, Calif. +, Oreg. +, Mont. +, Wyo. +, Wash. +, Alta. +, B.C. +, Sask. +, Yukon +, Nev. +, Idaho +  and S.Dak. +
Embryo quantity
1/5 +  and 1/3 +
Endosperm texture
liquid +, soft +  and hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret length
0.45 cm4.5 mm <br />0.0045 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Floret length or size
sometimes longer +
Floret pubescence
hairy +
Floret quantity
1 +
Floret reproduction
sexual +
Floret shape
fusiform +
Glume architecture
1-7-veined +
Glume architecture or shape
awned +
Glume coloration
hyaline +
Glume fragility
pliable +
Glume length
6mm +  and 12.5mm +
Glume position
subtending +
Glume presence
absent +
Glume quantity
1/4 +
Glume shape
obtuse +, acute +  and acuminate +
Glume texture
membranous +
Glume width
0.7mm +  and 1.1mm +
Hair arrangement
divergent +  and distributed +
Hair length or size
longer +
Hair orientation
erect +  and ascending +
Hair shape
uncinate +
Hair some measurement
0.5 cm5 mm <br />0.005 m <br /> (?) +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum shape
Ovate (?) +
Illustration copyright
Utah State University +
Illustrator
Cindy Roché +
Inflorescence architecture
compound +
Inflorescence condition or size
contracted +
Inflorescence position or structure subtype
terminal +
Inflorescence quantity
2 +
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 margin arrangement
Overlapping (?) +
Lemma architecture
3-5-veined +
Lemma architecture or pubescence or relief
smooth +
Lemma architecture or shape
not +  and awned +
Lemma body some measurement
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Lemma length or size
longer +
Lemma margin arrangement
overlapping +
Lemma pubescence
hairy +
Lemma quantity
1/3 +
Lemma shape
ovate +, rectangular +  and lanceolate +
Lemma texture
stiffly membranous +  and coriaceous +
Ligule architecture or pubescence or shape
ciliate +
Ligule coloration
hyaline +
Ligule presence
absent +
Ligule pubescence
pubescent +  and glabrous +
Ligule texture
membranous +
Lobe some measurement
? (?) +
Lobe 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
not lobed +
Lodicule texture
membranous +
Margin architecture or pubescence or shape
ciliate +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Node quantity
2 +  and 5 +
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 quantity
1/3 +  and 2/3 +
Palea shape
not keeled +
Palea size
reduced +
Palea some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Panicle development
developing +
Panicle length
9cm +  and 36cm +
Panicle width
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 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 condition
closed +
Sheath length
full +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 170.xml +
Special status
Endemic +
Spike architecture
ebracteate +
Spikelet arrangement
mixed +
Spikelet fixation
attached +
Spikelet fixation or orientation
appressed +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
unisexual +  and bisexual +
Spikelet shape
laterally compressed +  and terete +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
simple +  and compound +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +
Style quantity
2 +
Subsidiary-cell architecture
parallel-sided +
Synonyms
Stipa nelsonii var. dorei +  and Stipa nelsonii subsp. dorei +
Taxon family
Poaceae +
Taxon name
Achnatherum nelsonii subsp. dorei +
Taxon parent
Achnatherum nelsonii +
Taxon rank
subspecies +
Terminal awn quantity
single +
Terminal floret reproduction
sexual +
Tip pubescence
glabrous;glabrous +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper lemma quantity
74 +
Vein presence
absent +
Vein prominence
inconspicuous +
Vein quantity
2 (?) +
Vein shape
rounded +
Vein size
major +
Vein some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
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 +  and 10 +