Flora of North America species comparison

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Chorizanthe brevicornu var. brevicornu

Chorizanthe brevicornu var. spathulata
Photo is of parent taxon

brittle spineflower
Photo is of parent taxon

brittle spineflower, broad leaf brittle spineflower, Great Basin brittle spineflower
Habit Plants 0.5–3(–5) × 0.5–3 dm. Plants 0.5–2(–3) × 0.5–2 dm.
Leaf

blades oblanceolate to narrowly elliptic, 1.5–3(–4) × 0.1–0.3(–0.5) cm, apex acute.

blades broadly oblanceolate to broadly spatulate, 1–2 × 0.5–1 cm, apex round.
Involucres

distinctly and prominently ribbed at maturity.

obscurely ribbed at maturity.
2n

= 38, 40, 42, (46).

= 38.

Chorizanthe brevicornu var. brevicornu

Chorizanthe brevicornu var. spathulata
Phenology Flowering Feb–Jul. Flowering Apr–Jul.
Habitat Sandy places, mixed grassland, saltbush, creosote bush, and sagebrush communities, pinyon-juniper woodlands Sandy to gravelly places, mixed grassland, saltbush, blackbrush, and sagebrush communities, pinyon and/or juniper woodlands
Elevation -60-3000 m (-200-9800 ft) 700-2900(-3100) m (2300-9500(-10200) ft)
Distribution
from FNA
AZ; CA; NV; Mexico (Baja California, Sonora)
[BONAP county map]
from FNA
CA; ID; NV; OR
[BONAP county map]
Discussion

Variety brevicornu is known only from the warm Mojave and Sonoran deserts.

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

Variety spathulata is known only from the cold deserts of the Intermountain West.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 470. FNA vol. 5, p. 470.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Fragile > Chorizanthe brevicornu Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Fragile > Chorizanthe brevicornu
Sibling taxa
C. brevicornu var. spathulata
C. brevicornu var. brevicornu
Synonyms C. spathulata, C. brevicornu subsp. spathulata
Name authority unknown (Small ex Rydberg) C. L. Hitchcock: in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 2: 103. (1964)
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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