CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record lilaeopsis_masonii - Sat, Dec. 4, 2021, 17:43 ET b
Lilaeopsis masonii
common nameMason's lilaeopsis
CalPhotos image
more photos
© 1990 Dean Wm. Taylor  Follow image link for photo data.
life form rhizomatous herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S2      ranking system key
global rank
G2     G2: 6-20 occurrences OR 1,000-3,000 individuals OR 2,000-10,000 acres
Where did the "RED" code go?
CA state listingRare  11/79
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (26):
Holt (462B) 3712184, Union Island (462C) 3712174, Woodward Island (463A) 3712185, Clifton Court Forebay (463D) 3712175, Thornton (479B) 3812124, Terminous (479C) 3812114, Lodi South (479D) 3812113, Isleton (480A) 3812125, Rio Vista (480B) 3812126, Jersey Island (480C) 3812116, Bouldin Island (480D) 3812115, Denverton (481B) 3812128, Honker Bay (481C) 3812118, Antioch North (481D) 3812117, Fairfield South (482A) 3812221, Benicia (482C) 3812212, Vine Hill (482D) 3812211, Cuttings Wharf (483A) 3812223, Mare Island (483D) 3812213, Inverness (485D) 3812217, Bruceville (496C) 3812134, Clarksburg (497A) 3812145, Saxon (497B) 3812146, Liberty Island (497C) 3812136, Dozier (498D) 3812137, Napa (500D) 3812233
quad data info

Counties, states, regions:
Alameda (ALA), Contra Costa (CCA), Marin (MRN), Napa (NAP), Sacramento (SAC), San Joaquin (SJQ), Solano (SOL), Yolo (YOL)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Marshes and swamps (MshSw)(brackish or freshwater)
•Riparian scrub (RpScr)
blooming period Apr-Nov  
elevation range0 - 10 meters
Locally common in Suisun Bay. Threatened by erosion, channel stabilization, development, flood control projects, recreation, agriculture, shading resulting from marsh succession, and competition with non-native Eichhornia crassipes. Many populations ephemeral, exploiting newly deposited or exposed sediments. Collection from Chicken Ranch Beach, MRN Co. (485D) is probably L. occidentalis. Treated differently here than Madroņo 58(3):131-144 (2011), which treats L. masonii as a synonym of L. occidentalis. See Madroņo 24(2):81 (1977) for original description.
full nameLilaeopsis masonii Math. & Const.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  LIMA7 Element Code  PDAPI19030
CalFlora species this taxon    CalFlora genus related taxa
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, Dec. 4, 2021 from

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