Ceanothus diversifolius |
Ceanothus cuneatus |
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pine mat |
buck brush, common buckbrush, narrow-leaf buckthorn, sedge-leaf buckthorn, wedgeleaf cuneatus |
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Habit | Shrubs, evergreen, 0.2–0.3(–0.5) m, matlike. | Shrubs, 0.5–3.5 m. Stems erect, ascending, or spreading, not rooting at nodes; branchlets grayish brown to brown, rigid or flexible, glabrate, puberulent, or tomentulose, hairs straight. | ||||||||||||
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 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. |
usually both fascicled and not fascicled on same plant, rarely none fascicled; petiole 1–3 mm; blade flat to cupped, elliptic, oblanceolate, obovate, or orbiculate, 4–22(–30) × 3–12(–22) mm, base rounded, margins thick, not revolute, entire or denticulate distal to middle, teeth 0–9, apex obtuse, rounded, truncate, or retuse, abaxial surface pale green, glabrate or glabrous, adaxial surface green, glabrous. |
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Inflorescences | axillary, umbel-like to racemelike, 1.3–4 cm. |
axillary or terminal, 0.8–2.5 cm. |
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Flowers | sepals, petals, and nectary usually blue to pale blue, rarely white. |
sepals, petals, and nectary white to lavender or blue. |
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Capsules | 4–5 mm wide, weakly lobed near apex; valves smooth, crested. |
4–6 mm wide, weakly lobed; valves smooth, horns subapical, prominent, erect, intermediate ridges absent. |
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Ceanothus diversifolius |
Ceanothus cuneatus |
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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; OR; nw Mexico
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Discussion | 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.) |
Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 94. | FNA vol. 12, p. 99. | ||||||||||||
Parent taxa | Rhamnaceae > Ceanothus > subg. Ceanothus | Rhamnaceae > Ceanothus > subg. Cerastes | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | C. decumbens | Rhamnus cuneata | ||||||||||||
Name authority | Kellogg: Proc. Calif. Acad. Sci. 1: 58. (1855) | (Hooker) Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 267. (1838) | ||||||||||||
Web links |