familyPoaceae
subfamilyPoaceae subfam. Chloridoideae
tribePoaceae tribe Cynodonteae
genusRedfieldia
speciesRedfieldia flexuosa

Redfieldia flexuosa

(Thurb. ex A. Gray) Vasey
Stephan L. Hatch
Common names: Blow out- grass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 41.
Please click on the illustration for a higher resolution version.
Illustrator: Andy Sudkamp, Linda A. Vorobik

Copyright: Utah State University

Culms 50-130 cm. Ligules to 1.5 mm; blades 15-45 cm long, 2-8 mm wide. Panicles 20-50 cm long, 8-25 cm wide. Spikelets (3) 5-8 mm long, 3-5 mm wide. Lower glumes 3-4 mm; upper glumes 3.5-4.5 mm; callus hairs to 1.5 mm; lemmas 4.5-6 mm, glabrous or shortly pubescent, veins glabrous, entire or with 3 minute teeth; paleas glabrous; anthers 2-3.6 mm, yellow to reddish-purple; lodicules 2, truncate. Caryopses oblong, terete. 2n = 25.

Distribution

Colo., N.Mex., Tex., Utah, Kans., N.Dak., Nebr., Okla., S.Dak., Mont., Ill., Ariz., Wyo.

Discussion

Redfieldia flexuosa grows on sandhills and dunes. It is a common and important soil binder in blowout areas. It is only fair livestock forage but, because it grows in areas subject to blowout, this should not be of concern. The only Arizona collection wasmade in 1896; the Washington population was introduced for erosion control.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Redfieldia flexuosa"
RDF feed
2n chromosome quantity
25 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Adaxial cell presence
absent +
Adaxial cell shape
bulliform +
Adaxial cell structure in adjective form
stomatal +
Adaxial ligule architecture or pubescence or shape
ciliate +
Adaxial ligule length or size
longer +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +
Anther coloration
yellow +  and reddish-purple +
Anther quantity
3 +
Anther some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
Apex architecture
awn-tipped +
Apex architecture or shape
with 3 minute teeth +  and entire +
Apex shape
acute +  and attenuate +
Apical cell height or length or size
short +
Apical cell width
Wide (?) +
Arm cell anatomy
kranz +
Arm cell presence
absent +
Auricle presence
absent +
Author
Stephan L. Hatch +
Authority
(Thurb. ex A. Gray) Vasey +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
multiple +, , +  and single +
Back shape
keeled +  and rounded +
Base architecture
rooting +
Base arrangement
close +
Base fusion
not fused +
Base location
buried +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
membranous +
Base width
thick +
Blade architecture
not pseudopetiolate +
Blade architecture or arrangement
radiate +
Blade length
15 cm150 mm <br />0.15 m <br /> (45 cm450 mm <br />0.45 m <br />) +
Blade position
adaxial +
Blade pubescence
pubescent +  and glabrous +
Blade relief
scabridulous +
Blade shape
usually linear +  and lanceolate occasionally ovate +
Blade shape or vernation
involute +
Blade width
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Branch orientation
spreading +
Branch quantity
1;many +
Branch shape
spikelike +
Branch size
slender +
Callus hair some measurement
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Caryopsis shape
terete +  and oblong +
Cell shape
triangular +  and dome--shaped +
Cilium architecture or pubescence or shape
ciliate +
Cilium length or size
sometimes longer +
Cilium texture
membranous +
Column quantity
single +
Common name
Blow out- grass +
Culm architecture
branched +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +
Culm some measurement
50 cm500 mm <br />0.5 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Colo. +, N.Mex. +, Tex. +, Utah +, Kans. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Mont. +, Ill. +, Ariz. +  and Wyo. +
Embryo architecture or shape
cleft +
Embryo presence
absent +
Embryo shape
not waisted +
Embryo size
large +
Endosperm texture
hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret atypical quantity
1 +
Floret height or length or size
shorter +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
2 +  and 6 +
Floret reproduction
sterile +  and bisexual +
Floret shape
round +  and compressed +
Floret size
reduced +
Fusoid cell presence
absent +
Genus quantity
1 +
Glume architecture or shape
awned +
Glume height or length or size
shorter +
Glume length or size
shorter or longer +
Glume position
subtending +
Glume pubescence
glabrous +
Glume quantity
2 +
Glume shape
acute +
Glume size
unequal +
Group quantity
3 +
Hair pubescence or texture
soft +
Hair quantity
lacking +
Hair relief
coarse +
Hair shape
uncinate +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum height or length or size
short +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Andy Sudkamp +
Inflorescence architecture
open +
Inflorescence arrangement
paniculate +  and racemose +
Inflorescence density
diffuse +
Inflorescence fusion
distinct +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Inflorescence shape
conical +  and oblong +
Internode architecture
hollow +  and solid +
Internode shape
elongate +
Lateral-vein arrangement
converging +
Layer presence
not absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Leaf position
cauline +
Lemma architecture
3-veined +
Lemma architecture or shape
awned +
Lemma pubescence
pubescent +  and glabrous +
Lemma shape
lanceolate +  and falcate +
Lemma some measurement
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Ligule architecture or pubescence or shape
ciliate +
Ligule length or size
sometimes longer +
Ligule presence
absent +
Ligule some measurement
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Ligule texture
membranous +
Lodicule architecture or shape
truncate +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lower glume architecture
1-veined +
Lower glume some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Marginal hair arrangement
adjacent +
Marginal hair fragility
stiff +
Marginal hair relief
coarse +
Microhair presence
absent +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary pubescence
glabrous +
Palea pubescence
glabrous +
Palea shape
keeled +
Panicle architecture
simple +
Panicle branch height or length or size
short +
Panicle length
20cm +  and 50cm +
Panicle width
8 cm80 mm <br />0.08 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Pedicel fragility
pliable +
Pedicel length or size
longer +
Pedicel shape
capillary +
Pericarp architecture or fragility
loose +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp fusion
free +
Pericarp texture
dry +  and fleshy +
Raceme shape
spikelike +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath architecture or shape
ribbed +
Sheath condition
closed +
Sheath height or length or size
shorter +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 63.xml +
Special status
Endemic +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet coloration
olive-green +  and brownish +
Spikelet fixation
attached +
Spikelet length
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Spikelet position or shape
distal +
Spikelet presence
absent +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
sterile +
Spikelet shape
ovate +  and obovate +
Spikelet width
3mm +  and 5mm +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
compound +  and simple +
Starch-grain presence
absent +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +  and 3 (?) +
Style arrangement
separate +
Style quantity
2 +
Synonyms
Gramineae +
Taxon architecture
staminate +
Taxon family
Poaceae +
Taxon name
Redfieldia flexuosa +
Taxon parent
Redfieldia +
Taxon rank
species +
Taxon reproduction
dioecious +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tooth quantity
3 (?) +
Tooth size
minute +
Upper glume architecture
3-veined +  and 1-veined +
Upper glume some measurement
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Vein architecture or shape
with 3 minute teeth +  and entire +
Vein presence
absent +
Vein pubescence
glabrous +
Vein quantity
7 (?) +  and 13 (?) +
Vein size
major +
Volume
Volume 25 +
Whole organism arrangement or pubescence
tufted +
Whole organism depth
deep +
Whole organism duration
perennial +
Whole organism growth form
plant +
Whole organism growth form or habitat
aquatic +  and terrestrial +
Whole organism orientation
vertical +  and horizontal +
Whole organism reproduction
dioecious +, monoecious +  and synoecious +
Whole organism variability
varied +
X chromosome atypical quantity
12 +
X chromosome quantity
12 +, 10 +, 9 +, 8 +  and 7 +