Taxon Report

Xylorhiza panamintensis B.G. Baldwin & M. Berger

Panamint desert-aster

Print Report

Taxon Summary

Xylorhiza panamintensis, commonly known as Panamint desert-aster, is a perennial evergreen shrub in the Asteraceae that is found only in California. It occurs within Mojavean desert scrub, growing at elevations from 715 to 1300 meters. Xylorhiza panamintensis is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Xylorhiza panamintensis B.G. Baldwin & M. Berger
Common Name:	Panamint desert-aster
Family:	Asteraceae
Element Code:	PDASTA1090
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: (Apr-Nov)Dec-Feb	(Apr-Nov)Dec-Feb
Elevation:	715-1300 (2345-4265)
General Habitats:	Mojavean desert scrub
Microhabitat:	Carbonate, Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G1G2
State Rank:	S1S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 1B.3 on 2025-06-30

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)

Quads: Name (Quad Code)

Threat List Data from the CNDDB


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

Notes



Discovered in 2023 by M. Berger.
Threats:

Taxonomy:
Distinguished from X. tortifolia by the following characters: extensively branched (vs. unbranched) stems, heads sessile or nearly sessile (vs. long pedunculate) and in corymbiform groups (vs. solitary), outer phyllaries herbaceous (vs. scarious in proximal ¼ to ¾), smaller ray laminae (6–11.5 × 1–1.75 mm vs. 10–33 × 1.8–5.5 mm), and fewer pappus bristles 15–25 (vs. 35–90). See original description for additional details.

Selected References

Proposed addition to CRPR 1B.3, G1G2 / S1S2 (2025)

Madroño 71(4): 156-163 (2024)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 November 2025].