familyPoaceae
subfamilyPoaceae subfam. Panicoideae
tribePoaceae tribe Paniceae
genusDichanthelium
sectionDichanthelium sect. Oligosantha
speciesDichanthelium oligosanthes
subspeciesDichanthelium oligosanthes subsp. oligosanthes

Dichanthelium oligosanthes subsp. oligosanthes

Mary E. Barkworth
Treatment appears in FNA Volume 25. Treatment on page 421.
Please click on the illustration for a higher resolution version.
Illustrator: Hana Pazdírková, Linda A. Vorobik

Copyright: Utah State University

Culms 40-75 cm; internodes usually puberulent and also pubescent to pilose or appressed-hispid. Cauline sheaths usually puberulent and also pubescent to pilose or appressed-hispid; ligules 2-3 mm; blades usually 4-9 mm wide, more than 10 times longer than wide, stiff, spreading, usually densely appressed-pubescent abaxially, often involute towards the long-acuminate apices. Primary panicles with a few stiff branches; pedicels mostly 5-15 mm. Spikelets usually 3.4-4.2 mm long, 1.7-2 mm wide, ellipsoid to oblong-obovoid, usually sparsely pubescent. Upper glumes often with a faint orange spot at the base.

Discussion

Dichanthelium oligosanthes subsp. oligosanthes grows in dry, open, sandy, oak or pine woodlands. Its range extends from southern Ontario and New Hampshire to the Texas Gulf coast. It has not yet been reported from Mexico.

Selected References

None.

Lower Taxa

None.

"usually distinctly longer and narrower" is not a number."decumbent" is not a number.

... more about "Dichanthelium oligosanthes subsp. oligosanthes"
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2n chromosome quantity
18 +
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 +
Anther quantity
3 +
Apex shape
long-acuminate +
Arm cell presence
absent +
Arm cell quantity
anatomy +  and kranz +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
(Schult.) Gould +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
single +
Back shape
keeled +  and rounded +
Basal rosette season
winter +
Basal rosette variability
well-differentiated +
Base architecture
pseudopetiolate +  and branching +
Base architecture or shape
cormlike +
Base arrangement
divergent +  and parallel +
Base coloration
purplish spot +  and orange +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base shape
rounded +  and truncate +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade architecture
disarticulating +  and pseudopetiolate +
Blade architecture or arrangement
non-radiate +  and radiate +
Blade fragility
stiff +
Blade fusion
distinct +
Blade l w ratio
10+ +
Blade length
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Blade orientation
Spreading (?) +
Blade position
adaxial +
Blade prominence
more prominent +
Blade pubescence
appressed-pubescent +
Blade quantity
few +
Blade shape
involute +, flat +, ovate +  and lanceolate +
Blade shape or vernation
involute +
Blade some measurement
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Blade width
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Branch architecture
wiry +  and rebranching +
Branch development
developing +
Branch fragility
stiff +
Branch height or length or size
short +
Branch orientation
initially ascending;erect +
Branch presence
absent +
Branch pubescence
puberulent +
Branch quantity
few +
Branch relief
scabridulous +
Branch reproduction
sterile +
Branch shape
spikelike +
Branch some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Bristle presence
absent +
Bristle reproduction
sterile +
Callus development
not developed +
Caryopsis architecture or pubescence or relief
smooth +
Caryopsis architecture or shape
cleft +
Caryopsis presence
absent +
Caryopsis shape
terete +  and compressed +
Cauline leaf length or size
longer +
Cauline leaf quantity
5 (7) +
Cauline sheath pubescence
pubescent +  and pilose or appressed-hispid +
Cilium length or size
sometimes longer +
Clump growth form
bushy +
Clump size
Small (?) +
Collar architecture or fragility
loose +
Collar pubescence
puberulent +
Cross-section quantity
3 (?) +
Culm architecture
branching +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm growth form or orientation
decumbent +  and sprawling +
Culm growth form or texture
herbaceous +
Culm orientation
erect +
Culm quantity
1 (?) +
Culm shape
geniculate +
Culm some measurement
40 cm400 mm <br />0.4 m <br /> (75 cm750 mm <br />0.75 m <br />) +
Culm texture
woody +
Distal cell length or size
long +
Distal cell size or width
narrow +
Distribution
Wash. +, Va. +, Alta. +, B.C. +, Man. +, Ont. +, Sask. +, Del. +, D.C. +, Wis. +, W.Va. +, Fla. +, Wyo. +, N.H. +, N.J. +, N.Mex. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Okla. +, N.Y. +, Maine +, Colo. +, Calif. +, Ala. +, Kans. +, N.Dak. +, Nebr. +, S.Dak. +, Ark. +, Vt. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Idaho +, Conn. +, Md. +, Mass. +, Ohio +, Utah +, Mo. +, Minn. +, Mich. +, R.I. +, Mont. +, Miss. +, Ky. +  and Oreg. +
Embryo quantity
1/2 +
Embryo shape
waisted +
Embryo size
large +
Endosperm texture
hard +
Filament shape
capillary +
Flap character
germination +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret atypical quantity
3 +
Floret length or size
sometimes longer +
Floret palea development
well-developed +
Floret palea presence
absent +
Floret palea size
reduced +
Floret quantity
2 +
Floret reproduction
bisexual +
Floret shape
compressed +  and terete +
Fusoid cell presence
absent +
Glume apex architecture
gaping +
Glume architecture or shape
awned +
Glume height or length or size
shorter +
Glume length or size
shorter or longer +
Glume position
subtending +
Glume quantity
2 +
Glume size
unequal +
Glume texture
membranous +
Glume variability
equal +
Hair architecture
papillose-based +
Hair architecture or shape
awned +
Hair presence
absent +
Hair quantity
lacking +
Hair shape
uncinate +
Hair some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum shape
Oval (?) +  and Round (?) +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Hana Pazdírková +
Inflorescence architecture
bracteate +  and ebracteate +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Inflorescences panicle position or structure subtype
terminal +
Internode architecture
branching +
Internode coloration
purplish +
Internode length
elongated +
Internode pubescence
pubescent +  and pilose or appressed-hispid +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Leaf position
cauline +  and basal +
Lemma architecture or shape
awned +
Lemma coloration
hyaline +
Lemma texture
coriaceous +
Ligule architecture or pubescence or shape
ciliate +
Ligule derivation
true +
Ligule fusion
joined +
Ligule presence
absent +
Ligule some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Ligule texture
membranous +
Lodicule fusion
free +
Lodicule height or length or size
short +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule pubescence
glabrous +
Lodicule quantity
2 +
Lodicule shape
cuneate +
Lodicule texture
fleshy +
Lower floret architecture
staminate +
Lower floret reproduction
sterile +
Lower floret size
reduced +
Lower glume architecture
1-5-veined +
Lower glume quantity
1/5 +  and 3/4 +
Lower glume shape
acute +
Lower glume some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Lower palea height or length or size
shorter +
Lower palea presence
absent +
Lower palea width
thin +
Margin architecture or pubescence or shape
ciliate +
Margin arrangement
separated +
Margin coloration
hyaline +
Margin prominence or shape
flat +
Margin pubescence or texture
cartilaginous +
Margin shape or vernation
involute +
Microhair presence
absent +
Midrib architecture
complex +  and simple +
Node prominence
concealed +  and prominent +
Node pubescence
pubescent +  and glabrous +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea shape
keeled +
Panicle location
subterranean +
Papilla presence
absent +
Pedicel quantity
1 +
Pedicel some measurement
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Pericarp width
thin +
Primary panicle development
developing +
Primary panicle length
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Primary panicle position
partly enclosed +  and long-exserted +
Primary panicle reproduction
chasmogamous +
Primary panicle width
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Rachis prominence
evident +
Reference
None +
Ring size or width
thickened +
Secondary panicle reproduction
cleistogamous +
Secondary panicle size
small +
Secondary position
higher +
Secondary sheath position
included +
Secondary sheath size
small +
Sheath architecture
open +
Sheath arrangement
not overlapping +
Sheath condition
closed +
Sheath pubescence
papillose-hispid +, ascending +, puberulent +  and glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 1152.xml +
Spike architecture
complex +
Spike arrangement
bisexual +
Spike reproduction
unisexual +
Spikelet architecture
sessile +
Spikelet arrangement
in triplets +  and paired +
Spikelet character
length +
Spikelet fixation
attached +
Spikelet length
0.34 cm3.4 mm <br />0.0034 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
Spikelet presence
absent +
Spikelet pubescence
pubescent +
Spikelet quantity
6 +  and 60 +
Spikelet reproduction
unisexual +  and bisexual +
Spikelet shape
ellipsoid +  and oblong-obovoid +
Spikelet some measurement
0.25 cm2.5 mm <br />0.0025 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
Spikelet variability
varying +
Spikelet width
1.7mm +  and 2mm +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
simple +
Stigma coloration
red +
Style-branch arrangement
close +
Style-branch atypical quantity
4 +  and 1 +
Style-branch fusion
fused +  and free +
Style-branch quantity
2 (?) +
Style quantity
2 +  and 3 +
Subsidiary-cell shape
dome--shaped +  and triangular +
Surface shape
convex +
Synonyms
Panicum oligosanthes +
Taxon family
Poaceae +
Taxon name
Dichanthelium oligosanthes subsp. oligosanthes +
Taxon parent
Dichanthelium oligosanthes +
Taxon rank
subspecies +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper floret architecture
sessile +
Upper floret reproduction
bisexual +
Upper floret shape
umbonate +
Upper floret size
plump +
Upper glume architecture
veined +
Upper glume architecture or shape
not saccate +
Upper glume coloration
orange spot +
Upper glume height or length or size
slightly shorter +
Upper glume presence
absent +
Upper glume prominence
faint +
Upper glume size
subequal +
Upper lemma coloration or pubescence or relief
striate +
Upper lemma pubescence
glabrous +
Upper lemma reflectance
shiny +
Upper lemma texture
chartaceous-indurate +
Upper palea coloration or pubescence or relief
striate +
Vein presence
absent +
Vein prominence
more prominent +
Vein quantity
7 (?) +  and 9 (?) +
Vein size
major +
Volume
Volume 25 +
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 growth form or texture
herbaceous +
Whole organism reproduction
dioecious +, monoecious +  and synoecious +
Whole organism variability
various +
X chromosome atypical quantity
14 +, 12 +  and 7 +
X chromosome quantity
9 +