CNPS Inventory Plant Detail

Calochortus clavatus var. avius

Common Name:	Pleasant Valley mariposa lily
Family:	Liliaceae
Synonyms:
Element Code:	PMLIL0D095
Full Name:	Calochortus clavatus Wats. var. avius Jeps.
USDA PLANTS Symbol:	CACLA

Biology
Lifeform: perennial bulbiferous herb Blooming Period: May - July Habitat: • Lower montane coniferous forest (Josephine silt loam and volcanic)

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G4T2 T2: Imperiled. G4: (species) Apparently secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 103
Element Occurrence Ranks:

A B C D X U

8 33 22 3 2 35

Population Status:

Historic >20 yrs	Recent <=20 yrs
74	29

Presence:

Present Extant	Possibly Extirpated	Extirpated
101	2	0

Notes
Threatened by development and logging, and possibly by horticultural collecting. Potentially threatened by pipeline construction. 508B (Old Iron Mountain) former quad name is Stump Spring, CA. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1980-01-01 Last Update: 2012-04-02

Location

Elevation: 305 - 1800 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Amador (AMA), Calaveras (CAL), El Dorado (ELD), Mariposa (MPA) *

Quads: name (DWR code) USGS code
Illinois Hill (420D)* 37120C1, Garnet Hill (492A) 38120D3, Devils Nose (492B) 38120D4, Dorrington (492D) 38120C3, Stump Spring, Calif. (508B) 38120F4, Caldor (508C) 38120E4, Peddler Hill (508D) 38120E3, Sly Park (509A) 38120F5, Camino (509B) 38120F6, Omo Ranch (509D) 38120E5, Riverton (524C) 38120G4, Kyburz (524D) 38120G3, Pollock Pines (525D) 38120G5

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

113

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 .

-120.375,38.5