Parthenium incanum

Kunth in A. von Humboldt et al.

in A. von Humboldt et al., Nov. Gen. Sp. 4(fol.): 204. 1818.

,

4(qto.): 260. plate 391. 1820.

Common names: Mariola
Treatment appears in FNA Volume 21. Treatment on page 21. Mentioned on page 20.

Shrubs, 30–100+ cm. Leaf-blades oval-elliptic to obovate, 15–25 (–40+) × 6–15 (–25+) mm, sometimes pinnately (3–) 5–7-lobed or round-toothed, ultimate margins entire, faces tomentose (gray to white) and glanddotted. Heads radiate, in glomerules of 3–5+ on branched stalks 1–5 (–12+) cm, forming compound, corymbiform arrays. Peduncles 1–3+ mm. Phyllaries: outer 5 oblong, 1.5–2 mm, inner 5 orbiculate, 2–2.5 mm. Pistillate florets 5; corolla laminae ovate, 1–1.5 mm. Disc-florets 8–20 (–30+). Cypselae obovoid, 1.5–2 mm; pappuslike enations 2 (–3), erect to spreading, ± subulate, 0.5–1 mm. 2n = 54.


Phenology: Flowering (May–)Jul–Nov.
Habitat: Openings in desert scrub, often on limestone soils
Elevation: 1000–1500 m

Distribution

V21-32-distribution-map.gif

Ariz., Nev., N.Mex., Tex., Utah, Mexico

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Parthenium incanum"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and compound +
indeterminate +  and determinate +
John L. Strother +
Kunth in A. von Humboldt et al. +
decurrent +
compound +  and simple +
lobed;spatulate;rounded-deltate;ovate;obovate;oblanceolate;lyrate;lanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Mariola +
ochroleucous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
scabrellous +  and tuberculate +
fertile +  and bisexual +
Ariz. +, Nev. +, N.Mex. +, Tex. +, Utah +  and Mexico +
1000–1500 m +
subulate +  and pappuslike +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
winged +  and beaked +
dispersed +
Openings in desert scrub, often on limestone soils +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
less scarious +  and membranous +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
hemispheric +
conspicuous +
oblong +  and reniform or orbiculate or more or less coroniform +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and petiolate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
herbaceous +  and scarious +
2-carpellate +
peripheral +
papillate +
fimbrillate;cuneate;flabelliform +
membranous +  and scarious +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering (May–)Jul–Nov. +
unequal +  and subequal +
in A. von Humboldt et al., Nov. Gen. Sp. +
1818 +  and 1820 +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Parthenium incanum +
Parthenium +
species +
campanulate +  and cylindric +
toothed +  and entire +
perennial +, biennial +  and annual +