Classification


Scientific Name:	Smilax jamesii G.A. Wallace
Common Name:	English Peak greenbrier
Family:	Smilacaceae
Element Code:	PMSMI010D0
USDA Plants Symbol:	SMJA
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: May-Jul(Aug-Oct)	May-Jul(Aug-Oct)
Elevation:	505-1975 (1655-6480)
General Habitats:	Broadleafed upland forest, Lower montane coniferous forest, Marshes and swamps, North Coast coniferous forest, Upper montane coniferous forest
Microhabitat:	Lake Margins, Mesic (sometimes), Streambanks
Microhabitat Details:	sometimes mesic depressions

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G3G4
State Rank:	S3S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 1B.3 to 4.2 on 2016-08-26 changed from 1B.3 to 4.2 on 2016-07-11

Occurrence Data from the CNDDB


Total Occurrences:	158
Element Occurrence Ranks:
Excellent (A)	6
Good (B)	57
Fair (C)	58
Poor (D)	13
None (X)	0
Unknown (U)	24

Location


California Endemic: True
California Counties and Islands: Name (Code)
Del Norte (DNT), Shasta (SHA), Siskiyou (SIS), Trinity (TRI), Yuba (YUB)
Quads: Name (Quad Code)
Big Bend (4112118), Boulder Peak (4112351), Burney (4012186), Burney Mtn. West (4012176), Caribou Lake (4112218), Carrville (4112216), Chalk Mtn. (4012187), Chimney Rock (4112356), Covington Mill (4012287), Damnation Peak (4012285), Dead Horse Summit (4112127), English Peak (4112342), Goose Gap (4012281), Greenview (4112258), Grider Valley (4112362), Gridley (3912136), Hatchet Mtn. Pass (4012177), Marble Mountain (4112352), Mt. Hilton (4012381), Papoose Creek (4012276), Pondosa (4112126), Roaring Creek (4012188), Rush Creek Lakes (4012278), Sawyers Bar (4112332), Schell Mtn. (4012275), Shoeinhorse Mtn. (4112211), Siligo Peak (4012288), Skunk Ridge (4112117), Tangle Blue Lake (4112226), Tanners Peak (4112331), Trinity Center (4012286), Trinity Dam (4012277), Ukonom Lake (4112353), Weaverville (4012268), Whisky Bill Peak (4112215), Ycatapom Peak (4112217), Youngs Peak (4112323)

Threat List Data from the CNDDB


Threat List Total:	12
EOs with Threat Listed:	Total EOs	% of EOs
	123	78 %
Logging	92	58%
Road/trail construction/maint.	21	13%
Foot traffic/trampling	20	12%
Grazing	10	6%
Other	6	3%
Recreational use (non-ORV)	3	1%
Improper burning regime	3	1%
Mining	2	1%
Non-native plant impacts	2	1%
ORV activity	2	1%
Surface water diversion	2	1%
Erosion/runoff	1	0%

Notes



Previously CRPR 1B.3; more common than originally known. Potentially threatened by logging and associated road usage. Possibly threatened by vehicles, recreational activities, foot traffic, grazing, trampling, alteration of fire regimes, hydrological alterations, and non-native plants. See Brittonia 31:416-421 (1979) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Change on 2016-07-11

CRPR List Change on 2016-08-26

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 January 2025].

Taxon Report

Smilax jamesii G.A. Wallace

English Peak greenbrier