Amphiachyris dracunculoides

(de Candolle) Nuttall

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

Common names: Prairie broomweed
IllustratedEndemic
Basionym: 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.
Revision as of 20:46, 27 May 2020 by imported>Volume Importer

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 +