Status: record oenothera_deltoides_ssp._howellii - Wed, Feb. 10, 2010 03:07 c

Oenothera deltoides ssp. howellii
common name	Antioch Dunes evening-primrose	CalPhotos image Robert Potts © 2001 California Academy of Sciences  Follow image link for photo data.
family	Onagraceae
life form	perennial herb
CNPS List	List 1B.1 CA-Endemic LIST 1B: Rare, threatened, or endangered in California and elsewhere.      0.1: Seriously endangered in California
state rank	S1.1     S1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres
global rank	G5T1      ranking system key
	Where did the "RED" code go? Where did the "RED" code go? We've simplified our rating system. Read about it here. Under the old system, this plant was "3-3-3" (v6.05d, 9/05). Rarity 3: One to several highly restricted occurrences, or present in such small numbers that it is seldom reported. Endangerment 3: Seriously endangered in California. Distribution 3: Endemic to California.
CA state listing	Endangered  11/78
federal listing	Endangered  04/26/78

where found	Topographic quads (3): Jersey Island (480C) 3812116, Honker Bay (481C) 3812118, Antioch North (481D) 3812117 quad data info Quad numbers in parentheses are from the CA Department of Water Resources. The 7-digit numbers are the USGS equivalent. Red marks signify uncertainty[?] or extirpation[*]. See quad list above. A complete key is on the Index by Topo Quad page. Marks are smaller than the quads they represent, and are generally positioned near the center of the quad. In some coastal quads, this will place the mark offshore. Quad boundaries do not coincide with county lines. To confirm county location, refer to the county list below. Counties, states, regions: Contra Costa (CCA), Sacramento (SAC) counties map Quad Mark Identifier CNDDB Quick Viewer Web application for exploring the CNDDB elements reported at the quad level. (broadband recommended) A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats	•Inland dunes (InDns)
blooming period	Mar-Sep
elevation range	0 - 30 meters
notes	Known from three native occurrences; occurrences from SAC Co. (480C) and CCA Co. (481C) are introduced. Seriously threatened by mining, agriculture, industrial development, and non-native plants. Recovery work in progress. Protected in part at Antioch Dunes NWR (USFWS). See Aliso 2:81 (1949) for original description, Four Seasons 3(1):2-4 (1969) for threat information, and Biological Conservation 65:257-278 (1993) for population biology.
full name	Oenothera deltoides Torr. & Frem. ssp. howellii (Munz) W. Klein
	Additional information:
	standard acronym  OEDEH Element Code  PDONA0C0B4
CalFlora	this taxon    related taxa
Jepson Online	Jepson Manual and other resources
Google search	CNPS website    entire web

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Suggested citation: California Native Plant Society (CNPS). 2010. Inventory of Rare and Endangered Plants (online edition, v7-10a). California Native Plant Society. Sacramento, CA. Accessed on Wed, Feb. 10, 2010 from http://www.cnps.org/inventory