CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record polyctenium_williamsiae - Sat, Nov. 27, 2021 13:21 ET c
Polyctenium williamsiae
common nameWilliams' combleaf
CalPhotos image
more photos
© 2009 Steve Matson  Follow image link for photo data.
life formperennial herb
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly endangered in California
state rank
S1      ranking system key
global rank
G2Q      ranking system key
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (6):
West Of Huntoon Spring (468C) 3811816, Cedar Hill (469A) 3811827, Aurora (486C) 3811838, Dome Hill (487D) 3811931, Shaffer Mountain (621A) 4012043, Anderson Mountain (658A) 4012085
quad data info

Counties, states, regions:
Lassen (LAS), Mono (MNO), Nevada (NV), Oregon (OR)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Great Basin scrub (GBScr)
•Marshes and swamps (MshSw)
•Pinyon and juniper woodland (PJWld)
•Playas (Plyas)
•Vernal pools (VnPls)/sandy, volcanic, lake margins
blooming period Mar-Jul  
elevation range1347 - 2700 meters
Threatened by grazing and trampling. Possibly threatened by recreational activities. State-listed as Critically Endangered in NV. A synonym of P. fremontii in TJM 2. See Journal of the Arnold Arboretum 64:508 (1983) for original description, and Intermountain Flora 2B:416-419 (2005) for taxonomic treatment.
full namePolyctenium williamsiae Rollins
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym   Element Code  PDBRA23030
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
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Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Sat, Nov. 27, 2021 from

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