Species Details

Polygala subspinosa

spiny milkwort

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Scientific Name:
Polygala subspinosa Wats.
Common Name:
spiny milkwort
Family: Polygalaceae
Element Code: PDPGL021Q0
USDA Plants Symbol: POSU2
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G4?
State Rank:
S3
Other Status:
CRPR Changes:
changed from 2.2 to 2B.2 on 2013-06-12
Add Date: 1984-01-01
Date Edited: 2022-06-08
Lifeform: perennial herb
Blooming Period: May-Aug
Elevation:
1330 - 1705 meters
4365 - 5595 feet
General Habitat:
  • Great Basin scrub
  • Pinyon and juniper woodland
General Micro Habitat:
Micro Habitat:
  • Gravelly
  • Rocky
Notes:
Known in CA only from the Secret Valley area. Possibly threatened by pipeline construction. See American Naturalist 7:299 (1873) for original description.
Threats:
Taxonomy:
Other:
Total Occurrences: 71
Element Occurrence Ranks:
A B C D X U
4 25 5 7 0 30
Occurrence Status:
Historical >20 Years 59
Recent <=20 Years 12
Presence:
Presumed Extant 71
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Arizona (AZ), California (CA), Colorado (CO), Nevada (NV), New Mexico (NM), Utah (UT)
California Counties and Islands: Name (Code)
Lassen (LAS), Mono (MNO)
Quads: Name (Quad Code)
Smoke Creek Ranch (4011958), Al Shinn Canyon (4012061), Bull Flat (4012041), Cherry Mtn. (4012051), Coleville (3811955), Five Springs (4012052), Karlo (4012053), Litchfield (4012044), Little Hat Mtn. (4112011), Little Mud Flat (4012042), Risue Canyon (3811954), Shaffer Mtn. (4012043), Shinn Mtn. (4012062), Snake Lake (4112021), Snowstorm Mtn. (4012063), Spencer Creek (4012031)
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.

Map

Presumed Extant
Counties   Quads