familyPoaceae
subfamilyPoaceae subfam. Panicoideae
tribePoaceae tribe Paniceae
genusLasiacis
speciesLasiacis ruscifolia

Lasiacis ruscifolia

(Kunth) Hitchc.
Gerrit Davidse
Treatment appears in FNA Volume 25. Treatment on page 389.
Please click on the illustration for a higher resolution version.
Illustrator: Hana Pazdírková, Linda A. Vorobik

Copyright: Utah State University

Plants perennial; cespitose. Culms 1-8 m long, 5-12 mm thick, hollow, arching or clambering. Sheaths glabrous, puberulent, or hispid with papillose-based hairs, margins ciliate; ligules 0.2-1 mm, glabrous or ciliate; blades 2-16 cm long, 8-56 mm wide, ovate to ovatelanceolate. Panicles 2-22 cm; lower branches to 9 cm, divergent. Spikelets 2.6-4 mm, globose; lower glumes 1.2-2.2 mm, 9-13-veined; lower florets sterile; upper glumes 11-13-veined; upper florets 2.8-3.6 mm long, 2-2.9 mm wide, dark-brown to grayish-black at maturity; upper lemmas usually with a distinct shelf at the base, from which a sterile projection often arises; upper paleas usually deeply concave; anthers 1.4-2.3 mm, white; stigmas white. Caryopses 2-2.5 mm. 2n = 36.

Distribution

Fla.

Discussion

The range of Lasiacis ruscifolia extends from south¬ern Florida to Peru. Plants in the Flora region belong to L. ruscifolia (Kunth) Hitchc. var. ruscifolia, which dif¬fers from L. ruscifolia var. velutina (Swallen) Davidse in being scabrous or puberulent, rather than velutinous, on the panicle branches.

Selected References

None.

Lower Taxa

None.
... more about "Lasiacis ruscifolia"
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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 ligule architecture or pubescence or shape
ciliate +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +
Anther coloration
white +
Anther quantity
3 +
Anther some measurement
0.14 cm1.4 mm <br />0.0014 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Apex architecture or shape
apiculate +
Apex coloration
dark-brown +
Apex pubescence
woolly-pubescent +, pubescent +  and lanate +
Apex shape
obtuse +
Arm cell presence
absent +
Arm cell quantity
anatomy +  and kranz +
Auricle presence
absent +
Author
Gerrit Davidse +
Authority
(Kunth) Hitchc. +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
single +
Back shape
keeled +  and rounded +
Base architecture
pseudopetiolate +  and branching +
Base architecture or shape
saccate +  and asymmetric +
Base arrangement
divergent +  and parallel +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
membranous +
Base width
thick +
Blade architecture
disarticulating +  and pseudopetiolate +
Blade architecture or arrangement
non-radiate +  and radiate +
Blade length
2 cm20 mm <br />0.02 m <br /> (16 cm160 mm <br />0.16 m <br />) +
Blade position
adaxial +
Blade shape
ovate +  and ovatelanceolate +
Blade width
0.8 cm8 mm <br />0.008 m <br /> (5.6 cm56 mm <br />0.056 m <br />) +
Branch architecture
secund +
Branch shape
spikelike +
Branch some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Callus development
not developed +
Caryopsis architecture or shape
cleft +
Caryopsis presence
absent +
Caryopsis shape
orbicular +, ovoid +  and planoconvex +
Caryopsis some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Cilium length or size
sometimes longer +
Culm architecture
hollow +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm growth form
decumbent +  and climbing +
Culm growth form or location
floating +
Culm growth form or orientation
decumbent +
Culm length
100 cm1,000 mm <br />1 m <br /> (800 cm8,000 mm <br />8 m <br />) +
Culm orientation
clambering +  and arching +
Culm some measurement
50 cm500 mm <br />0.5 m <br /> (800 cm8,000 mm <br />8 m <br />) +
Culm texture
lignified +
Culm thickness
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Distal cell length or size
long +
Distal cell size or width
narrow +
Distribution
Fla. +
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
papillose-based +
Hair architecture or shape
awned +
Hair quantity
lacking +
Hair shape
uncinate +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum shape
Oblong (?) +  and Nearly round (?) +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Hana Pazdírková +
Inflorescence architecture
open +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Internode architecture
solid +  and hollow +
Internode length
elongated +
Layer presence
absent +
Leaf arrangement
distichous +
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
ciliate +
Ligule presence
absent +
Ligule pubescence
ciliate +  and glabrous +
Ligule some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 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 branch arrangement
Divergent (?) +
Lower branch some measurement
0 cm0 mm <br />0 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Lower floret architecture
staminate +
Lower floret reproduction
sterile +
Lower floret size
reduced +
Lower glume architecture
9-13-veined +
Lower glume quantity
1/3 +  and 2/3 +
Lower glume some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Lower lemma texture
membranous +
Lower palea presence
absent +
Lower palea size
reduced +
Margin architecture or pubescence or shape
ciliate +
Margin arrangement
overlapping +
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 +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea shape
keeled +
Panicle condition or size
contracted +
Panicle location
subterranean +
Panicle some measurement
2 cm20 mm <br />0.02 m <br /> (22 cm220 mm <br />0.22 m <br />) +
Papilla presence
absent +
Pedicel quantity
1 +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Projection reproduction
sterile +
Pseudopetiole presence
absent +
Rachis prominence
visible +
Reference
None +
Secondary position
higher +
Sheath architecture
open +
Sheath condition
closed +
Sheath pubescence
hispid +, puberulent +  and glabrous +
Shelf fusion
distinct +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 1102.xml +
Spike architecture
complex +
Spike arrangement
bisexual +
Spike reproduction
unisexual +
Spikelet architecture
sessile +
Spikelet arrangement
in triplets +  and paired +
Spikelet character
length +
Spikelet fixation
attached +
Spikelet presence
absent +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
unisexual +  and bisexual +
Spikelet shape
globose +
Spikelet some measurement
0.26 cm2.6 mm <br />0.0026 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Spikelet variability
varying +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
simple +
Stigma coloration
white +
Style-branch arrangement
close +
Style-branch atypical quantity
4 +  and 1 +
Style-branch fusion
fused +  and free +
Style-branch quantity
2 (?) +
Style quantity
2 +  and 3 +
Subsidiary-cell shape
dome--shaped +  and triangular +
Synonyms
Gramineae +
Taxon family
Poaceae +
Taxon name
Lasiacis ruscifolia +
Taxon parent
Lasiacis +
Taxon rank
species +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper floret architecture
stipitate +
Upper floret coloration
Dark-brown (Grayish-black) +
Upper floret length
0.28 cm2.8 mm <br />0.0028 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
Upper floret reproduction
bisexual +
Upper floret shape
acuminate +  and mucronate +
Upper floret width
0.2 cm2 mm <br />0.002 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
Upper glume architecture
11-13-veined +
Upper glume architecture or shape
not saccate +
Upper glume presence
absent +
Upper glume size
subequal +
Upper lemma shape
usually broadly elliptic +  and obovate +
Upper lemma texture
indurate +
Upper palea architecture or shape
saccate +
Upper palea shape
concave +
Vein presence
absent +
Vein quantity
2 (?) +
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 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 +