CNPS Inventory Plant Detail

Myosurus minimus ssp. apus

Common Name:	little mousetail
Family:	Ranunculaceae
Synonyms:
Element Code:	PDRAN0H031
Full Name:	Myosurus minimus L. ssp. apus (Greene) G.R. Campbell
USDA PLANTS Symbol:	MYSE2

Biology
Lifeform: annual herb Blooming Period: March - June Habitat: • Valley and foothill grassland • Vernal pools (alkaline)

Rarity Status
CA Rare Plant Rank: 3.1 Needs review .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G5T2Q T2: Imperiled. G5: (species) Secure, considering populations outside California. (There are taxonomic questions associated with this name)

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 24
Element Occurrence Ranks:

A B C D X U

1 7 1 1 0 14

Population Status:

Historic >20 yrs	Recent <=20 yrs
22	2

Presence:

Present Extant	Possibly Extirpated	Extirpated
24	0	0

This data is not available for all Rare Plant Rank 3 and 4 plants.

Notes

Move to List 1B? Reduced by vernal pool habitat loss; threatened by vehicles, grazing, development, and agriculture. Taxonomic problems; distinguishing between this taxon and M. sessilis (= M. minimus ssp. apus var. sessiliflorus in A California Flora (1959) by P. Munz) is difficult; are both rare? Plants in the Central Valley that resemble this taxon may be hybrids between M. minimus and M. sessilis; see Flora of North America 3:136 and Evolution 13:151-174 (1959) for details. See M. minimus in TJM (1993); not in TJM 2. See Bulletin of the California Academy of Sciences 1:277 (1885) for original description, and Aliso 2(4):396 (1952) for revised nomenclature.
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: 2013-02-04

Location

Elevation: 20 - 640 meters

California Endemic: no

States: California, Baja California, Oregon

California Counties and Islands: name (code)
Alameda (ALA), Contra Costa (CCA), Colusa (COL), Lake (LAK), Merced (MER), Riverside (RIV), San Bernardino (SBD), San Diego (SDG), Solano (SOL), Tulare (TUL), Yolo (YOL)

Quads: name (DWR code) USGS code
Dulzura (010A) 32116F7, Jamul Mountains (010B) 32116F8, Otay Mesa (010C) 32116E8, Otay Mountain (010D) 32116E7, Imperial Beach (011D) 32117E1, Del Mar (022B) 32117H2, La Mesa (022D) 32117G1, San Pasqual (034C) 33116A8, Oceanside (036B) 33117B4, Encinitas (036D) 33117A3, Las Pulgas Canyon (051C) 33117C4, San Clemente (052A) 33117D5, San Onofre Bluff (052D) 33117C5, Winchester (068A) 33117F1, Romoland (068B) 33117F2, Murrieta (068C) 33117E2, Lake Elsinore (069A) 33117F3, Wildomar (069D) 33117E3, Riverside East (086A) 33117H3, Steele Peak (086D) 33117G3, Lucerne Valley (131B) 34116D8, Pixley (288A) 35119H3, San Luis Ranch (403A) 37120B7, Arena (422C) 37120C6, Gustine (423C) 37120C8, Stevinson (423D) 37120C7, Altamont (445B) 37121F6, Clifton Court Forebay (463D) 37121G5, Saxon (497B) 38121D6, Dozier (498D) 38121C7, Clearlake Highlands (533B) 38122H6, Manor Slough (547A) 39122B3, Maxwell (562C) 39122C2

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.

Quad data is not available for all List 3 and 4 plants. For those that do contain this data, it has not been quality controlled and is potentially incomplete, inaccurate, and/or out of date. Please use caution when referencing this information. We are currently working hard to maintain this data and hope to provide accurate and up to date information in the near future.

Presumed Extant

Presumed Extirpated or Unknown

1159

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 .

-119.25,35.875