Taxon Report

Tripterocalyx crux-maltae (Kell.) Standl.

Kellogg's sand-verbena

Print Report

Taxon Summary

Tripterocalyx crux-maltae, commonly known as Kellogg's sand-verbena, is a perennial herb in the Nyctaginaceae that is found in California and elsewhere. It occurs within Great Basin scrub, growing at elevations from 1200 to 1500 meters. Tripterocalyx crux-maltae is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Tripterocalyx crux-maltae (Kell.) Standl.
Common Name:	Kellogg's sand-verbena
Family:	Nyctaginaceae
Element Code:	PDNYC0G020
USDA Plants Symbol:	TRCR5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	1200-1500 (3935-4920)
General Habitats:	Great Basin scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4?
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: False
California Counties and Islands: Name (Code)
Lassen (LAS)
Quads: Name (Quad Code)
Calneva Lake (4012021)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes



Known in CA from only one occurrence in Honey Lake Valley.
Threats:

Taxonomy:
See Proceedings of the California Academy of Sciences 2:71 (1863) for original description, Contributions from the U.S. National Herbarium 12:328 (1909) for revised nomenclature, and Brittonia 27(4):328-347 (1975) for taxonomic treatment.

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 November 2025].