Taxon Details
Rhinotropis subspinosa
spiny milkwort
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Taxon Summary:
Rhinotropis subspinosa, commonly known as spiny milkwort, is a perennial herb in the Polygalaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 1330 to 1705 meters. Rhinotropis subspinosa is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.|
Scientific Name: Rhinotropis subspinosa (S.Watson) J. R. Abbott |
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Common Name: spiny milkwort |
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| Family: | Polygalaceae | |
| Element Code: | PDPGL021Q0 | |
| USDA Plants Symbol: | POSU2 | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 2B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G4? |
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State Rank: |
S3 |
| Other Status: | |
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CRPR Changes: |
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| Add Date: | 1984-01-01 |
| Date Edited: | 2023-09-05 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: May-Aug
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Elevation:
1330 - 1705 meters 4365 - 5595 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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| Threat List Total: | 4 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 49 | 69 % |
| THREAT LIST: | ||
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| Grazing | 25 | 35% |
| Other | 21 | 29% |
| Road/trail construction/maint. | 8 | 11% |
| Non-native plant impacts | 5 | 7% |
| Total Occurrences: | 71 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 4 | 25 | 5 | 7 | 0 | 30 |
| Occurrence Status: | |||||
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| Historical >20 Years | 59 | ||||
| Recent <=20 Years | 12 | ||||
| Presence: | |||||
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| Presumed Extant | 71 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) Arizona (AZ), California (CA), Colorado (CO), Nevada (NV), New Mexico (NM), Utah (UT) |
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California Counties and Islands: Name (Code) Lassen (LAS), Mono (MNO) |
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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) |
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Notes:
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Presumed Extant
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