Taxon Details
Stylocline masonii
Mason's neststraw
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Taxon Summary:
Stylocline masonii, commonly known as Mason's neststraw, is a annual herb in the Asteraceae that is found only in California. It occurs within Chenopod scrub, and Pinyon and juniper woodland, growing at elevations from 100 to 1200 meters. Stylocline masonii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Stylocline masonii Morefield |
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Common Name: Mason's neststraw |
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| Family: | Asteraceae | |
| Element Code: | PDAST8Y080 | |
| USDA Plants Symbol: | STMA10 | |
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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: | 1B.1 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | BLM_S; USFS_S |
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CRPR Changes: |
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| Add Date: | 1994-01-01 |
| Date Edited: | 2025-07-01 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Mar-May
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Elevation:
100 - 1200 meters 330 - 3935 feet |
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General Habitats:
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| Microhabitat Details: On gravelly, loose sand in openings of washes, alluvial fans, flats, benches on hillslopes, and ridgetops. | ||||||||||||||
Microhabitat:
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Notes: Previously collected only once (1991) since 1971; most of known sites surveyed unsuccessfully in 1989. See Madroño 39(2):117 (1992) for original description and 43(3):434-435 (1996) for information on 1991 collection. |
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Threats: Threatened by development, non-native plants (Schismus arabicus), habitat disturbance, and altered fire regimes. |
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Taxonomy: |
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| Threat List Total: | 2 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 4 | 31 % |
| THREAT LIST: | ||
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| Development | 3 | 23% |
| Dam/Inundation | 1 | 7% |
| Total Occurrences: | 13 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 2 | 1 | 0 | 1 | 8 |
| Occurrence Status: | |||||
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| Historical >20 Years | 5 | ||||
| Recent <=20 Years | 8 | ||||
| Presence: | |||||
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| Presumed Extant | 12 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Kern (KRN), Los Angeles (LAX), Monterey (MNT), San Benito (SBT), San Luis Obispo (SLO) |
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Quads: Name (Quad Code) Acton (3411842), Bryson (3512171), Camatta Canyon (3512053), Camatta Ranch (3512043), Cholame (3512063), Cholame Valley (3512073), Fairmont Butte (3411874), Hames Valley (3512088), Idria (3612046), Panoche (3612057), Rosedale (3511942), Tierra Redonda Mountain (3512078), Tumey Hills (3612056), Weldon (3511863), Williams Hill (3512181) |
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Notes:
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Presumed Extant
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