familyPoaceae
subfamilyPoaceae subfam. Chloridoideae
tribePoaceae tribe Cynodonteae
genusTriplasis
speciesTriplasis americana

Triplasis americana

P. Beauv.
Stephan L. Hatch
Common names: Perennial sandgrass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 42.

Plants perennial; cespitose. Culms 30-80 cm, usually erect; nodes and internodes appressed-pubescent. Sheaths glabrous or pilose, margins ciliate; ligules to 2 mm, membranous, ciliate; blades to 20 cm long, usually less than 2 mm wide, filiform, scabrous adaxially. Panicles 1-5 cm long, 1-3 cm wide, occasionally reduced to a raceme. Spikelets 9-12 mm, with 2-5 florets. Glumes subequal, 3.4-4.5 mm, acuminate; lemmas 4-8 mm, lobes 4.5-8 mm, tapering to the acute apices; awns 8-11 mm, divergent; paleas 2-3 mm, keels ciliate; anthers 1.5-2 mm, yellow. Caryopses 1.5-2.5 mm, ovoid, tan. 2n = unknown.

Distribution

Ga., La., Ala., N.C., S.C., Miss., Fla.

Discussion

Triplasis americana is endemic to the southeastern United States. It grows on sandy soils in prairies and woods, being less common in maritime dunes than Triplasis purpurea.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Triplasis americana"
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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 +
Anther quantity
3 +
Anther some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Apex shape
acute +
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
P. Beauv. +
Awn arrangement
divergent +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
multiple +, , +  and single +
Awn some measurement
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Axillary panicle presence
absent +
Back shape
keeled +  and rounded +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
close +
Base fusion
not fused +
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
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Blade position
adaxial +
Blade pubescence
pubescent +  and glabrous +
Blade pubescence or relief
scabrous +
Blade shape
filiform +
Blade width
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Branch quantity
1;many +
Branch shape
spikelike +
Callus pubescence
hairy +
Caryopsis coloration
tan +
Caryopsis shape
ovoid +
Caryopsis some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
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
Perennial sandgrass +
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
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distal hair some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Distribution
Ga. +, La. +, Ala. +, N.C. +, S.C. +, Miss. +  and Fla. +
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 height or length or size
shorter +
Floret length or size
sometimes longer +
Floret quantity
2 +  and 5 +
Floret reproduction
fertile +  and sterile +
Floret shape
round +  and compressed +
Floret size
reduced +
Fusoid cell presence
absent +
Genus quantity
1 +
Glume architecture
1-veined +
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 shape
acuminate +
Glume size
subequal +
Glume some measurement
0.34 cm3.4 mm <br />0.0034 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Glume variability
equal +
Group quantity
3 +
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 copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Karen Klitz +
Inflorescence architecture
pistillate +
Inflorescence arrangement
paniculate +  and racemose +
Inflorescence fusion
distinct +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Inflorescence reproduction
cleistogamous +
Internode architecture
hollow +  and solid +
Internode pubescence
appressed-pubescent +
Internode shape
elongate +
Keel architecture or pubescence or shape
ciliate +
Keel pubescence
hairy +
Layer presence
not absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
3-veined +
Lemma architecture or shape
awned +
Lemma some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 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 /> (0.2 cm2 mm <br />0.002 m <br />) +
Ligule texture
membranous +
Lobe shape
tapering +
Lobe some measurement
? (?) +
Lodicule architecture or shape
truncate +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Margin architecture or pubescence or shape
ciliate +
Marginal hair arrangement
adjacent +
Marginal hair fragility
stiff +
Marginal hair relief
coarse +
Microhair presence
absent +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Node pubescence
appressed-pubescent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary pubescence
glabrous +
Palea shape
keeled +
Palea some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Panicle architecture
open +
Panicle branch height or length or size
short +
Panicle length
1cm +  and 5cm +
Panicle size
reduced +
Panicle width
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Pericarp architecture or fragility
loose +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp fusion
free +
Pericarp texture
dry +  and fleshy +
Primary inflorescence position or structure subtype
terminal +
Raceme shape
spikelike +
Rachilla length
prolonged +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath condition
closed +
Sheath pubescence
pilose +  and glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 65.xml +
Special status
Endemic +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet coloration
purplish +
Spikelet fixation
attached +
Spikelet position or shape
distal +
Spikelet presence
absent +
Spikelet quantity
few +
Spikelet reproduction
sterile +
Spikelet shape
compressed +
Spikelet some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
compound +  and simple +
Starch-grain presence
absent +
Stigma coloration
pink +  and purple +
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
Triplasis americana +
Taxon parent
Triplasis +
Taxon rank
species +
Taxon reproduction
dioecious +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper apex position
included +
Upper sheath position
included +
Vein presence
absent +
Vein pubescence
villous +
Vein quantity
7 (?) +  and 13 (?) +
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 reproduction
dioecious +, monoecious +  and synoecious +
Whole organism variability
varied +
X chromosome atypical quantity
12 +
X chromosome quantity
10 +