Flora of North America species comparison

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Chorizanthe polygonoides var. polygonoides
Photo is of parent taxon

knotweed spineflower
Habit Plants generally greenish.
Invo

-lucres 2–2.5 mm;

prominent teeth with awns 1.5–2 mm.
2n

= 40.

Chorizanthe polygonoides var. polygonoides
Phenology Flowering Apr–Jun.
Habitat Sandy to gravelly mostly volcanic soils, mixed grassland communities, oak-pine or montane conifer woodlands
Elevation 100-1500 m (300-4900 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Variety polygonoides occurs from Modoc County to Calaveras County in the Sierra Nevada, in the Sacramento Valley, and in the Coast Ranges from Lake County to Santa Barbara County. In San Luis Obispo and Monterey counties, knotweed spineflower is on sandstones or conglomerates rather than volcanic substrates. All populations are widely scattered and the plants are mostly rare to infrequent.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 466.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Acanthogonum > Chorizanthe polygonoides
Sibling taxa
C. polygonoides var. longispina
Synonyms Acanthogonum polygonoides
Name authority unknown
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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