familyPoaceae
subfamilyPoaceae subfam. Panicoideae
tribePoaceae tribe Paniceae
genusSetaria
subgenusSetaria subg. Paurochaetium
speciesSetaria chapmanii

Setaria chapmanii

(Vasey) Pilg.
James M. Rominger
Common names: Chapman's bristlegrass
Synonyms: Paspalidium chapmanii
Treatment appears in FNA Volume 25. Treatment on page 545.
Please click on the illustration for a higher resolution version.
Illustrator: Hana Pazdírková, Linda A. Vorobik

Copyright: Utah State University

Plants perennial; cespitose. Culms 40-100 cm, erect, slender; nodes glabrous. Sheaths mostly glabrous, margins ciliate distally; ligules 0.1-0.4 mm, of stiff hairs; blades 15-40 cm long, 2-5 mm wide, those of the basal leaves involute, those of the cauline leaves flat, adaxial surfaces sparsely pilose basally. Panicles to 35 cm, nodding, slender, interrupted; rachises scabridulous; branches 5-20, erect, axes 0.4-3.2 cm, undulating, with 3-12 spikelets in 2 ranks, a single bristle present below the terminal spikelets; bristles 3-6 mm. Spikelets 1.8-2.2 mm, obovate, turgid. Lower glumes 0.6-0.8 mm, about 1/3 as long as the spikelets, 3-veined; upper glumes equaling the upper lemmas, 5-7-veined; lower lemmas equaling the upper lemmas; lower paleas absent; upper lemmas finely and transversely rugose; anthers 0.9-1.1 mm. 2n = unknown.

Discussion

Setaria chapmanii is native to soils of coral or shell origin in the Florida Keys, the Bahamas, Cuba, and the Yucatan Peninsula, Mexico. The absence of the lower palea makes S. chapmanii unusual in subg. Paurochaetium.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Setaria chapmanii"
RDF feed
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 +
Adaxial surface pubescence
pilose +
Anther quantity
3 +
Anther shape
not penicillate +
Anther some measurement
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Arm cell presence
absent +
Arm cell quantity
anatomy +  and kranz +
Auricle presence
absent +
Author
James M. Rominger +
Authority
(Vasey) Pilg. +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
single +
Axis some measurement
0.4 cm4 mm <br />0.004 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
Back shape
keeled +  and rounded +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
divergent +  and parallel +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
membranous +
Base width
thick +
Blade architecture
petiolate +
Blade architecture or arrangement
non-radiate +  and radiate +
Blade architecture or arrangement or shape or vernation
not plicate +
Blade architecture or shape
folded +
Blade position
adaxial +
Blade prominence or shape
flat +
Blade shape
usually linear +  and lanceolate occasionally ovate +
Blade shape or vernation
involute +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Branch architecture
secund +
Branch fixation or orientation
appressed +
Branch height or length or size
short +
Branch orientation
erect +
Branch quantity
5;20 +
Branch shape
spikelike +
Branch some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Bristle duration
persistent +
Bristle presence
absent +
Bristle quantity
single +
Bristle shape
Terete (?) +
Bristle some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Callus development
not developed +
Caryopsis architecture or shape
cleft +
Caryopsis presence
absent +
Caryopsis shape
compressed +, ellipsoid +  and subglobose +
Caryopsis size
small +
Cilium length or size
sometimes longer +
Common name
Chapman's bristlegrass +
Culm architecture
branched +  and solid +
Culm architecture or arrangement or growth form
solitary +
Culm arrangement or pubescence
tufted +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm growth form or orientation
decumbent +
Culm orientation
erect +
Culm size
slender +
Culm some measurement
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Culm texture
woody +
Distal cell length or size
long +
Distal cell size or width
narrow +
Distribution
Conn. +, N.J. +, N.Y. +, Wash. +, Utah +, W.Va. +, Mich. +, Del. +, D.C +, Wis. +, Iowa +, Pacific Islands (Hawaii) +, Md. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Kans. +, N.Dak. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +, Wyo. +, Puerto Rico +, Calif. +, Oreg. +, Tex. +, La. +, N.C. +, Tenn. +, S.C. +, Ala. +, Virgin Islands +, Pa. +, Mont. +, Miss. +, Ohio +, Va. +, Colo. +, Alaska +, Ark. +, Ariz. +, Ga. +, Idaho +, Ill. +, Ind. +, Ky. +, Minn. +, Mo. +, Nev. +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +  and Yukon +
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 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 or shape
awned +
Hair fragility
stiff +
Hair quantity
lacking +
Hair shape
uncinate +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
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 +
Internode architecture
solid +  and hollow +
Internode length
elongated +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf blade length
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Leaf blade prominence or shape
flat +
Leaf blade shape or vernation
involute +
Leaf blade width
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
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
of hairs +  and ciliate +
Ligule presence
absent +
Ligule some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 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
paleate +
Lower floret reproduction
sterile +
Lower floret size
reduced +
Lower glume architecture
3-veined +
Lower glume architecture or shape
not saccate +
Lower glume quantity
1/3 +
Lower glume some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Lower glume texture
membranous +
Lower lemma architecture
5-7-veined +
Lower lemma presence
absent +
Lower lemma size
not constricted +
Lower lemma texture
indurate +  and membranous +
Lower lemma variability
rarely exceeding the upper lemmas +  and equaling +
Lower palea coloration
hyaline +
Lower palea presence
absent +
Lower palea texture
membranous +
Margin architecture or pubescence or shape
ciliate +
Margin arrangement
separated +
Margin coloration
hyaline +
Margin prominence or shape
flat +
Margin shape or vernation
involute +
Microhair presence
absent +
Midrib architecture
complex +  and simple +
Node prominence
concealed +  and prominent +
Node pubescence
glabrous +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea shape
keeled +
Panicle architecture
interrupted +
Panicle architecture or fragility
loose +
Panicle density
dense +
Panicle location
subterranean +
Panicle orientation
nodding +
Panicle shape
spikelike +
Panicle size
slender +
Panicle size or width
narrow +
Panicle some measurement
0 cm0 mm <br />0 m <br /> (35 cm350 mm <br />0.35 m <br />) +
Papilla presence
absent +
Pedicel quantity
1 +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Rachis prominence
evident +
Rachis pubescence
strigose +
Rachis pubescence or relief
scabrous +
Rachis relief
scabridulous +
Rank quantity
2 +
Reference
None +
Secondary position
higher +
Sheath architecture
open +
Sheath condition
closed +
Sheath pubescence
glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 1394.xml +
Spike architecture
complex +
Spike arrangement
bisexual +
Spike reproduction
unisexual +
Spikelet architecture
subsessile +  and short pedicellate +
Spikelet arrangement
in triplets +  and paired +
Spikelet character
length +
Spikelet condition
intact +
Spikelet fixation
attached +
Spikelet life cycle
falling +
Spikelet presence
absent +
Spikelet pubescence
glabrous +
Spikelet quantity
3 +  and 12 +
Spikelet reproduction
unisexual +  and bisexual +
Spikelet shape
turgid +  and obovate +
Spikelet some measurement
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Spikelet variability
varying +
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 coloration
red +  and white +
Style fusion
fused +  and free +
Style quantity
2 +
Subsidiary-cell shape
dome--shaped +  and triangular +
Synonyms
Paspalidium chapmanii +
Taxon family
Poaceae +
Taxon name
Setaria chapmanii +
Taxon parent
Setaria subg. Paurochaetium +
Taxon rank
species +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper floret reproduction
bisexual +
Upper glume architecture
5-7-veined +
Upper glume presence
absent +
Upper glume size
subequal +
Upper glume texture
membranous +  and herbaceous +
Upper lemma architecture or pubescence or relief
smooth +
Upper lemma life cycle
maturity +
Upper lemma quantity
1/2 +
Upper lemma relief
rugose +
Upper lemma texture
indurate +
Upper lemma variability
equaling +
Upper palea architecture or pubescence or relief
smooth +
Upper palea relief
rugose +
Upper palea texture
indurate +
Vein life cycle
maturity +
Vein presence
absent +
Vein quantity
2 (?) +
Vein shape
not keeled +
Vein size
reduced +
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 +