familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Melampodiinae
genusMelampodium
speciesMelampodium leucanthum

Melampodium leucanthum

Torrey & A. Gray

Fl. N. Amer. 2: 271. 1842.

John L. Strother
Illustrated
Treatment appears in FNA Volume 21. Treatment on page 35. Mentioned on page 34.
Please click on the illustration for a higher resolution version.
Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Perennials or subshrubs, 12–40 (–60) cm. Leaf-blades lanceolate, linear-oblong, or linear, 20–35 (–45) × 1–10 (–12) mm, lengths 3–8+ times widths, pinnately lobed, lobes 1–6, ultimate margins entire. Peduncles 3–7 cm. Outer phyllaries 5, connate 1/2–3/5 their lengths, ovate, 5–7 mm. Ray-florets 8–13; corollas cream-white (sometimes purplish abaxially), laminae oblongelliptic, 7–13 × 2.5–8 mm. Disc-florets 25–50. Fruits 1.5–2.6 mm. 2n = 20, 40.


Phenology: Flowering Mar–Oct.
Habitat: Open sites, grasslands, roadcuts, arid or desert scrublands
Elevation: (200–)1000–2000(–2500) m

Distribution

V21-63-distribution-map.gif

Ariz., Colo., Kans., N.Mex., Okla., Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Melampodium leucanthum"
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2n chromosome quantity
40 +  and 20 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
dark +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
corymbiform +  and open +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
Torrey & A. Gray +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade arrangement or course or shape
lance-linear +
Blade arrangement or shape
lance-elliptic +
Blade shape
lobed;rhombic;ovate;rhombic;ovate;linear-oblong;linear;lanceolate;deltate +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;15 +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Corolla architecture
zygomorphic +
Corolla coloration
cream-white +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela position
enclosed +
Cypsela quantity
8 +  and 20 +
Cypsela shape
obovoid +  and more or less prismatic +
Disc-floret architecture
staminate +
Disc-floret atypical quantity
70 (100) +
Disc-floret quantity
25 (50) +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Ariz. +, Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +  and Mexico (Sonora) +
Elevation
(200–)1000–2000(–2500) m +
Embryo course
straight +
Face pubescence
hairy +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Fruit some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Glomerule arrangement
singly +
Habitat
Open sites, grasslands, roadcuts, arid or desert scrublands +
Head architecture or arrangement
radiate +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Involucre diameter
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Involucre position relational
surrounding +
Involucre shape
hemispheric +
Lamina length
7mm;13mm +
Lamina shape
oblongelliptic +
Lamina width
2.5mm;8mm +
Leaf-blade atypical length
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Leaf-blade atypical width
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Leaf-blade l w ratio
3-8+ +
Leaf-blade length
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Leaf-blade shape
lobed;linear;linear-oblong;linear;linear-oblong;lanceolate +
Leaf-blade width
1mm;10mm +
Leaf architecture
sessile +  and petiolate +
Leaf arrangement
opposite +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe quantity
1 (6) +
Lobe shape
deltate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Number of lower taxa
0 +
Outer phyllary fusion
connate +
Outer phyllary lengths
1/2 (3/5) +
Outer phyllary quantity
5 +
Outer phyllary shape
ovate +
Outer phyllary some measurement
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Peduncle some measurement
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Perigynium architecture or pubescence or relief
smooth +
Perigynium relief
tuberculate +
Perigynium shape
Sculpted (?) +
Perigynium texture
hardened +, coriaceous +  and scarious +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Mar–Oct. +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary life cycle
falling +
Phyllary quantity
8 +  and 25 +
Phyllary size
unequal +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Fl. N. Amer. +
Publication year
1842 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
3 (5) +
Ray-floret quantity
8 (13) +
Ray-floret reproduction
fertile +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
convex;conic +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 63.xml +
Special status
Illustrated +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem orientation
prostrate +  and erect +
Stigmatic papilla presence
absent +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Melampodium leucanthum +
Taxon parent
Melampodium +
Taxon rank
species +
Throat shape
campanulate +
Tube height or length or size
shorter +
Ultimate margin architecture or shape
entire +
Ultimate margin shape
toothed +  and entire +
Volume
Volume 21 +
Whole-organism atypical some measurement
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
12 cm120 mm <br />0.12 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Whole organism atypical some measurement
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Whole organism growth form
subshrub +
Whole organism some measurement
12cm (40cm) +
X chromosome quantity
12 +