familyPoaceae
subfamilyPoaceae subfam. Chloridoideae
tribePoaceae tribe Cynodonteae
genusCynodon
speciesCynodon ×magennisii

Cynodon ×magennisii

magennisii Hurcombe
Mary E. Barkworth
Common names: Magennis' dogstooth grass
Treatment appears in FNA Volume 25. Treatment on page 238.

Plants stoloniferous and rhizomatous. Culms to 20 cm. Ligules of hairs; blades 1-1.5 mm wide, pubescent, at least adaxially. Panicles with 2-4 branches; branches in a single whorl, axes triquetrous. Spikelets about 3 mm. Glumes about 2 mm, about 2/3 as long as the spikelets; lemma keels not winged; anthers indehiscent at maturity. 2n = 27.

Discussion

Cynodon ×magennisii is a natural triploid hybrid between C. dactylon and C. transvaalensis (Harlan et al. 1970). Several cultivars have been developed for lawns and golf courses in the southern United States. These exhibit differing mixes of the characteristics of the two parent species.

Like triploid cultivars of C. dactylon, C. ×magennisii fails to produce either pollen or seeds and its anthers remain narrow and indehiscent at maturity. Diploid and tetraploid plants of C. dactylon also frequently fail to set seed because they are highly self-sterile, but they produce good pollen and their anthers dehisce at maturity.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Cynodon ×magennisii"
RDF feed
2n chromosome quantity
27 +
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 dehiscence
indehiscent +
Anther quantity
3 +
Apex shape
muticous +  and mucronate +
Apical cell height or length or size
short +
Apical cell width
Wide (?) +
Arm cell anatomy
kranz +
Arm cell presence
absent +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
magennisii Hurcombe +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
multiple +, , +  and single +
Axis shape
triquetrous +
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
disarticulating +
Blade architecture or arrangement
radiate +
Blade arrangement or vernation
conduplicate +
Blade position
adaxial +
Blade prominence or shape
flat +
Blade pubescence
pubescent +
Blade shape
involute +  and convolute +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Branch atypical quantity
1 (?) +
Branch quantity
2;4 +
Branch shape
spikelike +
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
Magennis' dogstooth grass +
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
ascending +  and erect +
Culm some measurement
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Culm texture
not woody +
Distal floret size
reduced +
Distribution
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, Del. +, D.C +, W.Va. +, Pacific Islands (Hawaii) +, Fla. +, N.H. +, Puerto Rico +, N.Mex. +, Tex. +, La. +, B.C. +, Md. +, Nebr. +, Tenn. +, N.C. +, S.C. +, Pa. +, Nev. +, Colo. +, Idaho +, Mont. +, Oreg. +, Virgin Islands +, Calif. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Kans. +, Okla. +, Mass. +, Ohio +, Utah +, Mo. +, Mich. +, Miss. +  and Ky. +
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 atypical quantity
1 +  and 3 +
Floret height or length or size
shorter +
Floret length or size
sometimes longer +
Floret quantity
1 +
Floret reproduction
bisexual +  and fertile +
Floret shape
round +  and compressed +
Floret size
reduced +
Fusoid cell presence
absent +
Genus quantity
1 +
Glume architecture or shape
awned +
Glume height or length or size
usually shorter +
Glume length or size
shorter or longer +
Glume position
subtending +
Glume quantity
2/3 +
Glume shape
muticous +  and keeled +
Glume some measurement
2 cm20 mm <br />0.02 m <br /> (?) +
Glume texture
membranous +
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 +
Inflorescence architecture
subdigitate +  and digitate +
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 architecture
winged +
Layer presence
not absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
3-veined +
Lemma architecture or shape
awned +
Lemma keel architecture
not winged +
Lemma shape
keeled +
Lemma texture
membranous +  and cartilaginous +
Ligule length or size
sometimes longer +
Ligule presence
absent +
Ligule texture
membranous +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lower glume architecture
1-veined +
Lowest floret function
functional +
Marginal hair arrangement
adjacent +
Marginal hair fragility
stiff +
Marginal hair relief
coarse +
Microhair presence
absent +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary pubescence
glabrous +
Palea shape
2-keeled +
Panicle architecture
simple +
Panicle branch height or length or size
short +
Pericarp architecture or fragility
loose +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp fusion
free +
Pericarp texture
dry +  and fleshy +
Raceme shape
spikelike +
Rachilla extension presence
absent +
Rachis prominence
evident +
Reference
None +
Row quantity
2 +
Sheath architecture
open +
Sheath condition
closed +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 847.xml +
Spikelet architecture
subsessile +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet arrangement
imbricate +
Spikelet fixation
attached +
Spikelet fixation or orientation
appressed +
Spikelet position or shape
distal +
Spikelet presence
absent +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
sterile +
Spikelet shape
compressed +
Spikelet some measurement
3 cm30 mm <br />0.03 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 (?) +
Style-branch shape
plumose +
Style arrangement
separate +
Style quantity
2 +
Synonyms
Gramineae +
Taxon architecture
staminate +
Taxon family
Poaceae +
Taxon name
Cynodon ×magennisii +
Taxon parent
Cynodon +
Taxon rank
species +
Taxon reproduction
dioecious +
Tissue coloration
hyaline +
Tissue texture
membranous +
Turf density
dense +
Upper glume architecture
1-3-veined +
Upper glume architecture or shape
awned +
Vein presence
absent +
Vein quantity
7 (?) +  and 13 (?) +
Vein size
major +
Volume
Volume 25 +
Whole organism architecture
rhizomatous +  and stoloniferous +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
perennial +
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 +
Whorl quantity
single +
X chromosome atypical quantity
12 +
X chromosome quantity
9 +