Amphiachyris dracunculoides

(de Candolle) Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 313. 1840

Common names: Prairie broomweed
IllustratedEndemic
Basionyms: Brachyris dracunculoides de Candolle Mém. Soc. Phys. Genève 7: 265. 1836
Synonyms: Gutierrezia dracunculoides (de Candolle) S. F. Blake Xanthocephalum amoenum var. intermedium Shinners
Treatment appears in FNA Volume 20. Treatment on page 88.

Plants 30–100(–200) cm. Primary stems 0.3–1(–2) mm diam. Leaf blades narrowly to broadly lanceolate, 5–60 × 0.5–6 mm. Heads in crowded corymbiform arrays. Phyllaries 2–3 × 1–2 mm. Receptacles deeply pitted, glabrous. Cypselae 1.2–2.2 mm, 7–9-ribbed, short-setulose. 2n = 10 (rarely 8).


Phenology: Flowering Jul–Nov.
Habitat: Calcareous, clay, or sandy soils, disturbed habitats
Elevation: 0–500 m

Distribution

V20-169-distribution-map.gif

Ala., Ark., Ill., Ind., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.Mex., Okla., Ohio, Pa., S.C., Tenn., Va.

Discussion

Amphiachyris dracunculoides is common in the south-central states, often in relatively large populations.

Selected References

None.

Lower Taxa

None.

Guy L. Nesom +
(de Candolle) Nuttall +
Brachyris dracunculoides +
Prairie broomweed +
Ala. +, Ark. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Nebr. +, N.Mex. +, Okla. +, Ohio +, Pa. +, S.C. +, Tenn. +  and Va. +
0–500 m +
Calcareous, clay, or sandy soils, disturbed habitats +
Flowering Jul–Nov. +
Trans. Amer. Philos. Soc., n. s. +
Illustrated +  and Endemic +
Gutierrezia dracunculoides +  and Xanthocephalum amoenum var. intermedium +
Amphiachyris dracunculoides +
Amphiachyris +
species +