Ceanothus impressus |
Ceanothus diversifolius |
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Santa Barbara ceanothus |
pine mat |
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Habit | Shrubs, evergreen, 0.5–3 m. Stems erect, not rooting at nodes; branchlets brown, not thorn-tipped, round in cross section, flexible, puberulent. | Shrubs, evergreen, 0.2–0.3(–0.5) m, matlike. | ||||
Stems | spreading, sometimes rooting at nodes; branchlets green, sometimes tinged red, not thorn-tipped, usually round, sometimes angled, in cross section, flexible, puberulent. |
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Leaves | petiole 0–4 mm; blade ± flat to strongly cupped, oblong, elliptic, or suborbiculate, 5–20(–25) × 2.5–17(–20) mm, base rounded, margins serrulate, thick to weakly or strongly revolute, teeth 11–29, apex obtuse to rounded, abaxial surface pale green, villosulous, adaxial surface dark to medium green, sparsely puberulent, not glandular papillate; pinnately veined, veins furrowed. |
petiole 3–11 mm; blade flat, elliptic to widely ovate, 12–45 × 6–20 mm, base obtuse to rounded, margins serrulate to denticulate, not revolute, usually not wavy, sometimes wavy, teeth 27–42, apex ± obtuse to rounded, abaxial surface pale green, pilosulous, adaxial surface green, pilosulous; usually pinnately veined, rarely 3-veined from base. |
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Inflorescences | axillary or terminal, umbel-like to racemelike, 1.2–3.5 cm. |
axillary, umbel-like to racemelike, 1.3–4 cm. |
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Flowers | sepals, petals, and nectary blue. |
sepals, petals, and nectary usually blue to pale blue, rarely white. |
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Capsules | 3–4 mm wide, lobed; valves smooth, crested. |
4–5 mm wide, weakly lobed near apex; valves smooth, crested. |
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Ceanothus impressus |
Ceanothus diversifolius |
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Phenology | Flowering Apr–Jun. | |||||
Habitat | Well-drained slopes and canyons, open to shaded sites, mixed evergreen and conifer forests. | |||||
Elevation | 700–2300 m. (2300–7500 ft.) | |||||
Distribution |
CA
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CA
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Ceanothus diversifolius occurs in the North Coast Ranges and the western slopes of the Cascade Range and the Sierra Nevada; it often forms mats to two meters wide. Marginal teeth on young leaves are notable in having more or less persistent, narrowly conic glands, not seen elsewhere in Ceanothus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 91. | FNA vol. 12, p. 94. | ||||
Parent taxa | Rhamnaceae > Ceanothus > subg. Ceanothus | Rhamnaceae > Ceanothus > subg. Ceanothus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. decumbens | |||||
Name authority | Trelease: Proc. Calif. Acad. Sci., ser. 2, 1: 112. (1888) | Kellogg: Proc. Calif. Acad. Sci. 1: 58. (1855) | ||||
Web links |