Ceanothus masonii |
Ceanothus lemmonii |
|
---|---|---|
Bolinas ceanothus, Mason's ceanothus |
Lemmon's ceanothus |
|
Habit | Shrubs, 0.6–2 m. Stems erect to ascending, not rooting at nodes; branchlets dark brown, rigid, ± tomentulose. | Shrubs, evergreen, 0.5–1 m. Stems ascending to spreading, not rooting at nodes; branchlets pale green to grayish green and glaucous, not thorn-tipped, round in cross section, flexible to ± rigid, sparsely villosulous. |
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. |
petiole 2–6 mm; blade flat, narrowly elliptic to oblong-elliptic, 13–35 × 6–15 mm, base cuneate to rounded, margins serrulate to denticulate most of length, not revolute, not wavy, teeth 34–45, apex acute to obtuse, abaxial surface pale green to grayish green and glaucous, villosulous, especially on veins, adaxial surface green, strigillose; pinnately veined or weakly 3-veined from base. |
Inflorescences | axillary, 1–2.5 cm. |
axillary or terminal, umbel-like to racemelike, 2–6.5 cm. |
Flowers | sepals, petals, and nectary deep blue to purple. |
sepals, petals, and nectary pale to deep blue. |
Capsules | 3–4 mm wide, not lobed; valves smooth, horns apical, minute, not rugose, intermediate ridges absent. |
3–4 mm wide, lobed near apex; valves smooth, crested. |
2n | = 24. |
= 24. |
Ceanothus masonii |
Ceanothus lemmonii |
|
Phenology | Flowering Feb–Apr. | Flowering Apr–May. |
Habitat | Soils derived from serpentine, chaparral, pine forests. | Rocky slopes and flats, open sites, conifer forests, oak and pine woodlands. |
Elevation | 100–500 m. (300–1600 ft.) | 200–1300 m. (700–4300 ft.) |
Distribution |
CA
|
CA
|
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.) |
Ceanothus lemmonii occurs in the inner North Coast Ranges, Klamath Mountains, and the western slope of the Cascade Range and northern Sierra Nevada. H. McMinn (1944) reported putative hybrids with C. foliosus, C. integerrimus, and C. oliganthus var. sorediatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 103. | FNA vol. 12, p. 94. |
Parent taxa | Rhamnaceae > Ceanothus > subg. Cerastes | Rhamnaceae > Ceanothus > subg. Ceanothus |
Sibling taxa | ||
Name authority | McMinn: Madroño 6: 171. (1942) | Parry: Proc. Davenport Acad. Nat. Sci. 5: 192. (1889) — (as lemmoni) |
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