Flora of North America species comparison

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Amphiachyris dracunculoides

Amphiachyris amoena

common broomweed, prairie broomweed

Texas broomweed
Habit Plants 30–100(–200) cm. Plants 20–40(–60) cm.
Leaf

blades narrowly to broadly lanceolate, 5–60 × 0.5–6 mm.

blades linear, rarely linear-lanceolate, 5–25(–35) × 0.2–1(–2) mm.
Receptacles

deeply pitted, glabrous.

with hooked, swollen-based hairs.
Phyllaries

2–3 × 1–2 mm.

3–4 × 1–2 mm.
Heads

in crowded corymbiform arrays.

in open paniculiform arrays.
Cypselae

1.2–2.2 mm, 7–9-ribbed, short-setulose.

2–3 mm, 4–6-ribbed, long-setulose.
Primary

stems 0.3–1(–2) mm diam.

stems usually (2–)5 mm diam.
2n

= 10 (rarely 8).

= 8.

Amphiachyris dracunculoides

Amphiachyris amoena
Phenology Flowering Jul–Nov. Flowering late Sep–Oct.
Habitat Calcareous, clay, or sandy soils, disturbed habitats Calcareous soils and gravels on or near limestone outcrops
Elevation 0–500 m (0–1600 ft) 0–650 m (0–2100 ft)
Distribution
from FNA
AL; AR; IA; IL; IN; KS; KY; LA; MO; MS; NE; NM; OH; OK; PA; SC; TN; VA
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

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

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 88. FNA vol. 20, p. 88.
Parent taxa Asteraceae > tribe Astereae > Amphiachyris Asteraceae > tribe Astereae > Amphiachyris
Sibling taxa
A. amoena
A. dracunculoides
Synonyms Brachyris dracunculoides, Gutierrezia dracunculoides, Xanthocephalum amoenum var. intermedium Xanthocephalum amoenum, Gutierrezia amoena
Name authority (de Candolle) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 313. (1840) (Shinners) Solbrig: Rhodora 62: 52. (1960)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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