familyPoaceae
subfamilyPoaceae subfam. Chloridoideae
tribePoaceae tribe Cynodonteae
genusTridens
speciesTridens buckleyanus

Tridens buckleyanus

(L.H. Dewey) Nash
Jesus Valdes-Reyna
Common names: Buckley's tridens
Endemic
Treatment appears in FNA Volume 25. Treatment on page 36.
Please click on the illustration for a higher resolution version.
Illustrator: Karen Klitz, Linda A. Vorobik

Copyright: Utah State University

Plants cespitose. Culms 30-60 cm, erect; lower nodes sometimes hispid. Sheaths scabridulous, rounded; ligules 0.4-1 mm, membranous, ciliate; blades 1-4 mm wide, flat, apices attenuate. Panicles 10-28 cm long, 1-6 cm wide; branches (2) 4-13 cm, widely-spaced, ascending to spreading; pedicels 1-2 mm. Spikelets 7-10 mm, pale to dark purple, with 2-5 florets. Glumes 1-veined; lower glumes 4-5 (6) mm; upper glumes slightly shorter; lemmas 4-6 mm, midveins and back pubescent below midlength, lateral-veins pubescent to well above midlength, midveins occasionally excurrent, lateral-veins usually ending before the distal margins, rarely excurrent; paleas 3.5-4 mm, veins pubescent basally; anthers 1.5-2 mm. Caryopses about 2.5 mm. 2n = 32, but this may erroneous (Gould 1975).

Distribution

Tex.

Discussion

Tridens buckleyanus is endemic to the southeastern portion of the Edwards Plateau, Texas. It grows on rocky slopes along shaded stream banks and the borders of woodlands.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Tridens buckleyanus"
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2n chromosome quantity
32 +
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 or density
reddish-purple +
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
attenuate +
Apex shape or architecture
emarginate to bilobed +
Apical cell height or length or size
short +
Apical cell width
Wide (?) +
Arm cell anatomy
kranz +
Arm cell presence
absent +
Auricle presence
absent +
Author
Jesus Valdes-Reyna +
Authority
(L.H. Dewey) Nash +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
multiple +, , +  and single +
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
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Blade position
adaxial +
Blade prominence or shape
flat +
Blade pubescence
pubescent +  and glabrous +
Blade shape
involute +  and flat +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Branch arrangement
widely-spaced +
Branch atypical some measurement
2 cm20 mm <br />0.02 m <br /> (?) +
Branch orientation
ascending;spreading +
Branch quantity
1;many +
Branch shape
spikelike +
Branch some measurement
4 cm40 mm <br />0.04 m <br /> (13 cm130 mm <br />0.13 m <br />) +
Callus pubescence
pilose +  and glabrous +
Caryopsis coloration
dark-brown +
Caryopsis shape
reniform +  and compressed +
Caryopsis some measurement
2.5 cm25 mm <br />0.025 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
Buckley's tridens +
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 pubescence
glabrous +
Culm some measurement
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Culm texture
not woody +
Distal floret height or length or size
shorter +
Distal floret size
reduced +
Distal floret variability
equaling +
Distribution
Tex. +
Embryo architecture or shape
cleft +
Embryo presence
absent +
Embryo quantity
2/5 +
Embryo shape
not waisted +
Embryo size
large +
Endosperm texture
hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret atypical quantity
16 +
Floret height or length or size
shorter +
Floret length or size
sometimes longer +
Floret position or shape
distal +
Floret quantity
2 +  and 5 +
Floret reproduction
sterile +  and bisexual +
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 +
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
Present +
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
exserted +
Inflorescence position or structure subtype
terminal +
Inflorescence some measurement
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Internode architecture
hollow +  and solid +
Internode shape
elongate +
Lateral-vein architecture
excurrent +
Lateral-vein pubescence
pubescent +
Layer presence
not absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
3-veined +
Lemma architecture or shape
awned +
Lemma coloration
hyaline +
Lemma some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Lemma texture
membranous +
Ligule architecture or pubescence or shape
ciliate +
Ligule length or size
sometimes longer +
Ligule presence
absent +
Ligule some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ligule texture
membranous +
Lodicule fusion
adnate +  and free +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lower glume architecture
1(3)-veined +
Lower glume atypical some measurement
6 +
Lower glume some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Lower glume variability
equal +
Lower node pubescence
hispid +
Margin pubescence or texture
cartilaginous +
Margin width
not thick +
Marginal hair arrangement
adjacent +
Marginal hair fragility
stiff +
Marginal hair relief
coarse +
Microhair presence
absent +
Midrib architecture
simple +
Midvein architecture
excurrent +
Midvein pubescence
pubescent +
Midvein some measurement
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary pubescence
glabrous +
Palea pubescence
pubescent +  and glabrous +
Palea shape
keeled +
Palea some measurement
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Panicle architecture
simple +
Panicle branch height or length or size
short +
Panicle length
10cm +  and 28cm +
Panicle width
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Pedicel some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
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 +
Rhizome architecture
stoloniferous +
Rhizome height or length or size
short +
Rhizome shape
elongate +  and knotty +
Sheath architecture
open +
Sheath condition
closed +
Sheath height or length or size
shorter +
Sheath relief
scabridulous +
Sheath shape
rounded +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 56.xml +
Special status
Endemic +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet atypical some measurement
13 +
Spikelet coloration
pale +  and dark purple +
Spikelet fixation
attached +
Spikelet position or shape
distal +
Spikelet presence
absent +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
fertile +
Spikelet shape
compressed +
Spikelet some measurement
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
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
Tridens buckleyanus +
Taxon parent
Tridens +
Taxon rank
species +
Taxon reproduction
dioecious +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper glume architecture
1-3(9)-veined +
Upper glume height or length or size
shorter +
Vein presence
absent +
Vein pubescence
pubescent +
Vein quantity
7 (?) +  and 13 (?) +
Vein size
major +
Volume
Volume 25 +
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 +