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allionia, hierba de la hormiga, pink three-flower, pink windmills, trailing allionia, trailing four-o'clock, trailing windmills, umbrella-wort, windmills

Habit Herbs, perennial, sometimes annual, sparingly glandular puberulent to spreading viscid-villous.
Stems

often reddish, 0.1–1.5 m.

Leaves

progressively reduced distally;

distal leaves proportionately narrower than proximal;

larger leaves: petiole 2–25 mm, equaling or shorter than blade;

blade usually flat, sometimes undulate, 20–65 × 10–35 mm, base often oblique, obtuse, or round, margins entire or sinuate, apex acute, sometimes obtuse or round.

Inflorescences

peduncle 3–25(–30) mm, involucres ovoid when mature, 4–6.5(–9) mm.

Perianth

deep pink to magenta, 5–15 mm.

Fruits

deeply convex, 2.9–4.7 × 1.5–2.8 mm;

lateral ribs with 0–4 teeth, teeth usually broadly (rarely narrowly) triangular, never gland tipped, or edge of fruit wings entire or with only irregular undulations and incisions, concave side of fruit with 4–7 glands per row (glands rarely continuous or 2 rows glandless);

stalks equaling or shorter than diameter of glandular head.

Allionia incarnata

Distribution
from FNA
AZ; CA; CO; NM; NV; OK; TX; UT; Mexico; Central America; South America; West Indies
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Discussion

Varieties 2 (2 in the flora).

Allionia incarnata was used by indigenous peoples to treat swellings, was added to baths to reduce fever, and also prepared as a decoction to treat diarrhea and kidney ailments (S. Cheatham et al. 1995, vol. 1). Occasionally fruits of A. incarnata are shallowly convex and resemble, in this respect, the fruits of A. choisyi.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Abaxial perianth limb 3-8(-10) mm; flower cluster 5-10(-12) mm diam. in anthesis; fruits 3-5 mm
var. incarnata
1. Abaxial perianth limb 10-15 mm; flower cluster 20-25 mm diam. in anthesis; fruits mostly 4-6 mm
var. villosa
Source FNA vol. 4, p. 59.
Parent taxa Nyctaginaceae > Allionia
Sibling taxa
A. choisyi
Subordinate taxa
A. incarnata var. incarnata, A. incarnata var. villosa
Synonyms Wedelia incarnata, Wedeliella incarnta
Name authority Linnaeus: Syst. Nat. ed. 10, 2: 890. (1759)
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