CNPS Inventory Plant Detail

Dimeresia howellii

Common Name:	doublet
Family:	Asteraceae
Synonyms:
Element Code:	PDAST2Z010
Full Name:	Dimeresia howellii Gray
USDA PLANTS Symbol:	DIHO2

Biology
Lifeform: annual herb Blooming Period: May - September Habitat: volcanic, xeric. • Lower montane coniferous forest • Pinyon and juniper woodland

Rarity Status
CA Rare Plant Rank: 2.3 Rare, threatened, or endangered in California, but more common elsewhere .3: Not very endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.3 S2: Imperiled. .3: No current threats known. Global Rank: G4? G4: Apparently secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 47
Element Occurrence Ranks:

A B C D X U

7 16 1 0 0 23

Population Status:

Historic >20 yrs	Recent <=20 yrs
27	20

Presence:

Present Extant	Possibly Extirpated	Extirpated
47	0	0

Notes

Possibly threatened by foot traffic and grazing. Threatened in ID. See Synoptical Flora of North America ed. 2, 1(2):449 (1886) for original description, and Fremontia 16(1):15-17 (1988) for brief species account and BLM management plans.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2013-01-18

Location

Elevation: 1340 - 2380 meters

California Endemic: no

States: California, Idaho, Nevada, Oregon

California Counties and Islands: name (code)
Lassen (LAS), Modoc (MOD), Siskiyou (SIS)

Quads: name (DWR code) USGS code
Sheepshead (659D) 40120G7, Emerson Peak (673B) 41120B2, Ash Valley (675C) 41120A6, Adin (676B) 41120B8, Letterbox Hill (676C) 41120A8, Lane Reservoir (676D) 41120A7, Warren Peak (690B) 41120D2, Eagle Peak (690C) 41120C2, Alturas (692A) 41120D5, Rattlesnake Butte (692B) 41120D6, Infernal Caverns (692D) 41120C5, Lake City (707B) 41120F2, Cedarville (707C) 41120E2, Payne Peak (708D) 41120E3, Mahogany Ridge (709D) 41120E5, Caldwell Butte (712B) 41121F4, Schonchin Butte (713A) 41121F5, Bonita Butte (713B) 41121F6, Lake Annie (724A) 41120H1, Mt. Bidwell (724B) 41120H2, Willow Ranch (725A) 41120H3

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

566

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-120.5,41.375