CNPS

CNPS Rare Plant Inventory



Taxon Details

Calamagrostis bolanderi

Bolander's reed grass

  View Report   Copy Link Calflora eFlora CCH CalPhotos iNaturalist
Photo of Calamagrostis bolanderi
©2009 Zoya Akulova 		Photo of Calamagrostis bolanderi
©2009 Zoya Akulova 		Photo of Calamagrostis bolanderi
©2017 Hayley Ross

Taxon Summary:

Calamagrostis bolanderi, commonly known as Bolander's reed grass, is a perennial rhizomatous herb in the Poaceae that is found only in California. It occurs within Bogs and fens, Broadleafed upland forest, Closed-cone coniferous forest, Coastal scrub, Marshes and swamps (freshwater), Meadows and seeps (mesic), and North Coast coniferous forest, growing at elevations from 0 to 455 meters. Calamagrostis bolanderi is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

  Classification

Scientific Name:
Calamagrostis bolanderi Thurb.
Common Name:
Bolander's reed grass
Family: Poaceae
Element Code: PMPOA17010
USDA Plants Symbol: CABO
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 4.2
Fed List: None
State List: None
Global Rank: G4
State Rank:
 S4
Other Status:
CRPR Changes:
changed from 1B to 4.2 on 2003-03-14
Add Date: 1974-01-01
Date Edited: 2023-06-06

  Ecology and Life History

Lifeform: perennial rhizomatous herb
Blooming Period: May-Aug
JFMAMJJASOND
Elevation:
0 - 455 meters
0 - 1495 feet
General Habitats:
  • Bogs and fens
  • Broadleafed upland forest
  • Closed-cone coniferous forest
  • Coastal scrub
  • Meadows and seeps (mesic)
  • Marshes and swamps (freshwater)
  • North Coast coniferous forest
Microhabitat Details:
Microhabitat:
  • Mesic

  Notes

Notes:
Possibly threatened by vehicles, logging, development, and grazing.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

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

  Occurrence Data from the CNDDB

Total Occurrences: 0
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 0
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 0
Presence:
Presumed Extant 0
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Humboldt (HUM), Mendocino (MEN), Sonoma (SON)
Quads: Name (Quad Code)
Annapolis (3812363), Comptche (3912335), Crannell (4112411), Dutchmans Knoll (3912356), Elk (3912326), Eureka Hill (3812385), Fort Bragg (3912347), Gualala (3812375), Hales Grove (3912377), Inglenook (3912357), Mallo Pass Creek (3912316), Mathison Peak (3912336), Mendocino (3912337), Navarro (3912325), Northspur (3912345), Noyo Hill (3912346), Piercy (3912387), Plantation (3812353), Point Arena (3812386), Rodgers Peak (4112421), Saunders Reef (3812376), Sebastopol (3812247), Sherwood Peak (3912355), Stewarts Point (3812364), Trinidad (4112412), Two Rock (3812237)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

CNPS Status Review: Proposed Change from CRPR 1B, G2 / S2.2 to 4, G3 / S3.2 (2003)

Go to top


Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 July 2025].
}