Taxon Report

Cryptantha hooveri I.M. Johnst.

Hoover's cryptantha

Print Report

Taxon Summary

Cryptantha hooveri, commonly known as Hoover's cryptantha, is a annual herb in the Boraginaceae that is found only in California. It occurs within Inland dunes, and Valley and foothill grassland (sandy), growing at elevations from 9 to 150 meters. Cryptantha hooveri is ranked 1A, Plants Presumed Extirpated in California and Either Rare or Extinct Elsewhere.

Classification


Scientific Name:	Cryptantha hooveri I.M. Johnst.
Common Name:	Hoover's cryptantha
Family:	Boraginaceae
Element Code:	PDBOR0A190
USDA Plants Symbol:	CRHO4
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-May	Apr-May
Elevation:	9-150 (30-490)
General Habitats:	Inland dunes, Valley and foothill grassland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1A
Global Rank:	GH
State Rank:	SH
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 1B to 1A on 2005-08-23

Occurrence Data from the CNDDB


Total Occurrences:	4
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	4
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Contra Costa (CCA), Madera (MAD), Sacramento (SAC), Stanislaus (STA)*
Quads: Name (Quad Code)
Antioch North (3812117), Antioch South (3712187), Bliss Ranch (3712014), Chowchilla (3712013), Cooperstown (3712065)*, Knowles (3711927), Little Table Mtn. (3711917), Millerton Lake West (3711916), O'Neals (3711926)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	3	75 %
Agriculture	2	50%
Development	1	25%

Notes



Last seen in 1939. Recent surveys unsuccessful; additional field work needed. See Journal of the Arnold Arboretum 18:23 (1937) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Change on 2005-08-23

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 23 November 2025].