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 gland-dotted. 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; pappus-like 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"
John L. Strother +
Kunth in A. von Humboldt et al. +
Mariola +
Ariz. +, Nev. +, N.Mex. +, Tex. +, Utah +  and Mexico. +
1000–1500 m +
Openings in desert scrub, often on limestone soils +
Flowering (May–)Jul–Nov. +
in A. von Humboldt et al., Nov. Gen. Sp. +
1818 +  and 1820 +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Parthenium incanum +
Parthenium +
species +