familyPoaceae
subfamilyPoaceae subfam. Chloridoideae
tribePoaceae tribe Cynodonteae
genusAcrachne
speciesAcrachne racemosa

Acrachne racemosa

(B. Heyne ex Roem. & Schult.)
Sylvia M. Phillips
Treatment appears in FNA Volume 25. Treatment on page 112.
Please click on the illustration for a higher resolution version.
Illustrator: Linda A. Vorobik

Copyright: Utah State University

Culms 17-50 cm. Blades 7-20 cm long, 5-11.5 mm wide, bases rounded, setaceous apically. Influorescence branches 1.5-10 cm, in whorls of 2-5, either subdigitate or on rachises up to 15 cm long. Spikelets 5.5-13 mm, oblong, serrate in outline, with 6-25 florets. Lower glumes 1.2-2.9 mm, linear-oblong, acute, mucronate; upper glumes 1.5-3 mm, lanceolate, acuminate, awn-tipped; lemmas 2-2.8 mm, narrowly ovate, keels scabrous, shallowly concave distally, midveins excurrent, forming stout, 0.3-0.9 mm awns; lateral-veins also slightly excurrent. Fruits ellipsoid; seeds blackish, rugose, finely granular. 2n = 36.

Distribution

Calif.

Discussion

Acrachne racemose grows in areas of seasonal rainfall in tropical regions of Africa, Asia, and Australia. It has been found in Riverside County, California and may become established there.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Acrachne racemosa"
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2n chromosome quantity
36 +
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 quantity
1 +  and 3 +
Apical cell height or length or size
short +
Apical cell width
Wide (?) +
Arm cell anatomy
kranz +
Arm cell presence
absent +
Auricle presence
absent +
Author
Sylvia M. Phillips +
Authority
(B. Heyne ex Roem. & Schult.) +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn fragility or size
stout +
Awn orientation
arising +
Awn quantity
multiple +, , +  and single +
Awn some measurement
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Axis shape
flattened +
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 shape
setaceous +  and rounded +
Base size
swelling +
Base texture
membranous +
Base width
thick +
Blade architecture
not pseudopetiolate +
Blade architecture or arrangement
radiate +
Blade arrangement or course or shape
linear +
Blade length
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Blade position
adaxial +
Blade pubescence
pubescent +  and glabrous +
Blade shape
usually linear +  and lanceolate occasionally ovate +
Blade width
0.5 cm5 mm <br />0.005 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
Branch architecture
on rachises +  and subdigitate +
Branch quantity
1;many +
Branch shape
spikelike +
Branch some measurement
1.5 cm15 mm <br />0.015 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Caryopsis development
modified +
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 +
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 shape
geniculate +
Culm some measurement
17 cm170 mm <br />0.17 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Calif. +
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
6 +  and 25 +
Floret reproduction
bisexual +  and fertile +
Floret shape
round +  and compressed +
Floret size
reduced +
Fruit shape
ellipsoid +
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
keeled +
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 +
Inflorescence architecture
pistillate +
Inflorescence arrangement
paniculate +  and racemose +
Inflorescence fusion
distinct +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Internode architecture
hollow +  and solid +
Internode shape
elongate +
Keel pubescence or relief
scabrous +
Keel shape
concave +
Lateral-vein architecture
excurrent +
Layer presence
not absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
awn-tipped +, cuspidate +  and 3-veined +
Lemma architecture or shape
awned +
Lemma life cycle
fallen +
Lemma pubescence
glabrous +
Lemma quantity
few +
Lemma shape
ovate +
Lemma some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
Lemma texture
membranous to cartilaginous +  and membranous +
Ligule architecture or pubescence or shape
ciliate +
Ligule length or size
sometimes longer +
Ligule presence
absent +
Ligule texture
membranous +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lower glume shape
mucronate +, acute +  and linear-oblong +
Lower glume some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
Marginal hair arrangement
adjacent +
Marginal hair fragility
stiff +
Marginal hair relief
coarse +
Microhair presence
absent +
Midrib architecture
simple +
Midvein architecture
excurrent +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary pubescence
glabrous +
Palea duration
persistent +
Palea shape
keeled +
Panicle architecture
simple +
Panicle branch height or length or size
short +
Pericarp architecture or fragility
loose +
Pericarp arrangement
separating +
Pericarp coloration
hyaline +
Pericarp condition or texture
dry +
Pericarp dehiscence
rupturing +
Pericarp fusion
free +
Pericarp texture
dry +  and fleshy +
Raceme shape
spikelike +
Rachis length
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Rachis prominence
evident +
Rachis shape
elongate +
Reference
None +
Seed architecture
sulcate +
Seed coloration
blackish +
Seed pubescence or relief or texture
granular +
Seed relief
rugose +
Sheath architecture
open +
Sheath condition
closed +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 181.xml +
Spikelet architecture
subsessile +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet architecture or shape
serrate +
Spikelet arrangement
imbricate +
Spikelet fixation
attached +
Spikelet life cycle
in part +  and falling +
Spikelet position or shape
distal +
Spikelet presence
absent +
Spikelet prominence
rudimentary +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
sterile +
Spikelet shape
oblong +
Spikelet some measurement
0.55 cm5.5 mm <br />0.0055 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Spikelet spikelet shape
compressed +
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
Acrachne racemosa +
Taxon parent
Acrachne +
Taxon rank
species +
Taxon reproduction
dioecious +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper glume architecture
awn-tipped +
Upper glume shape
acuminate +  and lanceolate +
Upper glume some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Vein presence
absent +
Vein quantity
7 (?) +  and 13 (?) +
Vein size
major +
Volume
Volume 25 +
Whole-organism development
acropetal +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
annual +
Whole organism growth form
plant +
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
9 +