Taxon Report

Xanthisma gracile (Nuttall) D.R. Morgan & R.L. Hartman

annual bristleweed

Print Report

Classification


Scientific Name:	Xanthisma gracile (Nuttall) D.R. Morgan & R.L. Hartman
Common Name:	annual bristleweed
Family:	Asteraceae
Element Code:	PDAST640E0
USDA Plants Symbol:
Synonyms/Other Names:	Machaeranthera gracilis (Nutt.) Shinners

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jul(Sep)	Apr-Jul(Sep)
Elevation:	1220-1555 (4005-5100)
General Habitats:	Joshua tree "woodland", Mojavean desert scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G5
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:

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: False
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Castle Peaks (3511532), Hart Peak (3511531), Havasu Lake (3411444), Pinto Valley (3511523)

Threat List Data from the CNDDB


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

Notes



See Phytologia 68(6):457 (1990) for taxonomic treatment and SIDA 20(4): 1405-1406 (2003) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].