Melampodium leucanthum

Torrey & A. Gray

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

Illustrated
Treatment appears in FNA Volume 21. Treatment on page 35. Mentioned on page 34.

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"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
John L. Strother +
Torrey & A. Gray +
decurrent +
compound +  and simple +
lobed;rhombic;ovate;rhombic;ovate;linear-oblong;linear;lanceolate;deltate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
8 +  and 20 +
obovoid +  and more or less prismatic +
fertile +  and bisexual +
Ariz. +, Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +  and Mexico (Sonora) +
(200–)1000–2000(–2500) m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Open sites, grasslands, roadcuts, arid or desert scrublands +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
hemispheric +
oblongelliptic +
2.5mm;8mm +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lobed;linear;linear-oblong;linear;linear-oblong;lanceolate +
sessile +  and petiolate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2-carpellate +
persistent +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
tuberculate +
hardened +, coriaceous +  and scarious +
Flowering Mar–Oct. +
8 +  and 25 +
Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
exalbuminous +
Illustrated +
prostrate +  and erect +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Melampodium leucanthum +
Melampodium +
species +
campanulate +
toothed +  and entire +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
12 cm120 mm <br />0.12 m <br /> (40 cm400 mm <br />0.4 m <br />) +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +