CNPS Inventory Plant Detail

Calamagrostis crassiglumis

Common Name:	Thurber's reed grass
Family:	Poaceae
Synonyms:
Element Code:	PMPOA17070
Full Name:	Calamagrostis crassiglumis Thurb.
USDA PLANTS Symbol:	CASTI3

Biology
Lifeform: perennial rhizomatous herb Blooming Period: May - July Habitat: • Coastal scrub (mesic) • Marshes and swamps (freshwater)

Rarity Status
CA Rare Plant Rank: 2.1 Rare, threatened, or endangered in California, but more common elsewhere .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2? S2: Imperiled. Global Rank: G3Q G3: Vulnerable. (There are taxonomic questions associated with this name)

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 11
Element Occurrence Ranks:

A B C D X U

1 2 1 1 0 6

Population Status:

Historic >20 yrs	Recent <=20 yrs
7	4

Presence:

Present Extant	Possibly Extirpated	Extirpated
11	0	0

Notes
In review. Undocumented in HUM Co.; need quads. Threatened by grazing at Pt. Reyes NS. See C. stricta ssp. inexpansa in TJM (1993) and TJM 2. See Botany of California 2:281 (1880) for original description. 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: 10 - 45 meters

California Endemic: no

States: California, !AK, Arizona, Colorado, !CT, !IA, Idaho, !IL, !IN, !KS, !MA, !ME, !MI, !MN, !MO, !MT, !ND, !NE, !NH, !NJ, New Mexico, Nevada, !NY, !OH, Oregon, !PA, !SD, Utah, !VT, Washington, !WI, !WV, Wyoming

California Counties and Islands: name (code)
Del Norte (DNT), Mendocino (MEN), Marin (MRN), Sonoma (SON)

Quads: name (DWR code) USGS code
Drakes Bay (485C) 38122A8, Sebastopol (502A) 38122D7, Inglenook (585D) 39123E7, Crescent City (740C) 41124G2

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

370

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 .

-123.75,39.5