Flora of North America species comparison

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Chorizanthe biloba var. immemora
Photo is of parent taxon

Hernandez spineflower, Hernandez's spineflower, San Benito spineflower
Outer tepals

emarginate or subcordate apically.
2n

= 34, 36, 38, 40, 42, 44, 46.

Chorizanthe biloba var. immemora
Phenology Flowering May–Sep.
Habitat Sandy to gravelly soils, mixed grassland communities, pine-oak woodlands
Elevation 600-800 m (2000-2600 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Variety immemora is found on the eastern slope of the Diablo Range in southern San Benito County and in adjacent Monterey County. Hernandez spineflower is restricted to five small populations of a few individuals each. Plants of this taxon were variously identified as C. palmeri, C. biloba, or C. obovata prior to 1989. C. B. Hardham (1989) believed that the variety may be a product of past hybridization, given the variation in chromosome number. She also found meiotic chromosomes of three size classes, numerous nucleoli, and atypical pollen grains.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 458.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes > sect. Ptelosepala > Chorizanthe biloba
Sibling taxa
C. biloba var. biloba
Name authority Reveal & Hardham: Phytologia 66: 138. (1989)
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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