Ceanothus masonii |
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Bolinas ceanothus, Mason's ceanothus |
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Habit | Shrubs, 0.6–2 m. Stems erect to ascending, not rooting at nodes; branchlets dark brown, rigid, ± tomentulose. |
Leaves | not fascicled; petiole 1–2 mm; blade flat, usually elliptic or oval, sometimes suborbiculate, 7–21 × 4–13 mm, base rounded to ± cuneate, margins not revolute, denticulate most of length, teeth 9–17, apex obtuse, rounded to truncate, abaxial surface pale green to grayish green, strigose on veins, glabrate, adaxial surface dark green, glabrous. |
Inflorescences | axillary, 1–2.5 cm. |
Flowers | sepals, petals, and nectary deep blue to purple. |
Capsules | 3–4 mm wide, not lobed; valves smooth, horns apical, minute, not rugose, intermediate ridges absent. |
2n | = 24. |
Ceanothus masonii |
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Phenology | Flowering Feb–Apr. |
Habitat | Soils derived from serpentine, chaparral, pine forests. |
Elevation | 100–500 m. (300–1600 ft.) |
Distribution |
CA
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Discussion | Ceanothus masonii occurs only at a few localities on Bolinas Ridge, Marin County. With the exception of its leaf morphology, it bears a close resemblance to C. gloriosus var. exaltatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 103. |
Parent taxa | Rhamnaceae > Ceanothus > subg. Cerastes |
Sibling taxa | |
Name authority | McMinn: Madroño 6: 171. (1942) |
Web links |