Ceanothus lemmonii |
Ceanothus cuneatus |
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Lemmon's ceanothus |
buck brush, common buckbrush, narrow-leaf buckthorn, sedge-leaf buckthorn, wedgeleaf cuneatus |
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Habit | 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. | 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. | ||||||||||||
Leaves | 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. |
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 or terminal, umbel-like to racemelike, 2–6.5 cm. |
axillary or terminal, 0.8–2.5 cm. |
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Flowers | sepals, petals, and nectary pale to deep blue. |
sepals, petals, and nectary white to lavender or blue. |
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Capsules | 3–4 mm wide, 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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2n | = 24. |
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Ceanothus lemmonii |
Ceanothus cuneatus |
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Phenology | Flowering Apr–May. | |||||||||||||
Habitat | Rocky slopes and flats, open sites, conifer forests, oak and pine woodlands. | |||||||||||||
Elevation | 200–1300 m. (700–4300 ft.) | |||||||||||||
Distribution |
CA
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CA; OR; nw Mexico
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Discussion | 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.) |
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 | Rhamnus cuneata | |||||||||||||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 5: 192. (1889) — (as lemmoni) | (Hooker) Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 267. (1838) | ||||||||||||
Web links |