Flora of North America species comparison

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Chorizanthe xanti var. xanti

Chorizanthe sect. Ptelosepala
Photo is of parent taxon

pinyon spineflower, riverside spineflower, Xantus' spineflower
Habit Plants prostrate to spreading or somewhat erect.
Stems

not disarticulating at each node.
Leaf

blades lanceolate to ovate or spatulate.
Inflorescences

bracts with or without awns.
Involucres

thinly pubescent.

cylindric, campanulate, or urceolate, occasionally ventricose basally, 3-angled, 6-ribbed, 6-toothed, with or without membranous or scarious margins continuous across sinuses;

awns unequal, typically with anterior one longest.
Flowers

1;

perianth white, yellow, rose, red, maroon, dark purple, or lavender, thinly pubescent;

stamens 3–9;

filaments adnate at base of floral tube.
Achenes

light brown to dark brown, lenticular or globose-lenticular.
2n

= 38, 42.

Chorizanthe xanti var. xanti

Chorizanthe sect. Ptelosepala
Phenology Flowering Apr–Jul.
Habitat Sandy to gravelly places in mixed grassland, saltbush and chaparral communities, pine-oak woodlands
Elevation (60-)300-1600 m ((200-)1000-5200 ft)
Distribution
from FNA
CA
[BONAP county map]
w United States; nw Mexico
Discussion

Variety xanti is found in the Coast Ranges from western Merced, eastern Monterey, and San Benito counties south to the Transverse Ranges of northern Santa Barbara and Ventura counties, thence eastward along the northern foothills of the San Gabriel and San Bernardino mountains to extreme southwestern San Bernardino County, and then northward through the Tehachapi Mountains of central and eastern Kern County onto the foothills of the Sierra Nevada, going as far north as Madera County. In 1935, a disjunct population was sampled near Benton Station in southern Mono County (Robinson & Lindner 20, RSA) but it has not been recollected.

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

Species 31 (25 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 464. FNA vol. 5, p. 451.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala > Chorizanthe xanti Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes
Sibling taxa
C. xanti var. leucotheca
Subordinate taxa
Synonyms C. section Anisogonum, C. section Eriogonellopsis, C. section Herbaceae
Name authority unknown Nuttall: Proc. Acad. Nat. Sci. Philadelphia 4: 17. (1848)
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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