Ceanothus lemmonii |
Ceanothus crassifolius |
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Lemmon's ceanothus |
hoary-leaf ceanothus |
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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, 1.5–4 m. Stems erect, not rooting at nodes; branchlets grayish brown to brown, ± flexible to rigid, 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. |
not fascicled; petiole 2–6 mm; blade flat to ± cupped, elliptic to widely elliptic, 12–25(–30) × 8–15(–23) mm, base obtuse to rounded, margins thick or revolute, entire to denticulate most of length, teeth 8–19, apex obtuse to rounded, abaxial surface pale green to white, tomentulose to glabrate, adaxial surface green, sparsely tomentulose, hairs straight, glabrescent. |
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Inflorescences | axillary or terminal, umbel-like to racemelike, 2–6.5 cm. |
axillary or terminal, 1–2 cm. |
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Flowers | sepals, petals, and nectary pale to deep blue. |
sepals and petals white; nectary blue to black. |
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Capsules | 3–4 mm wide, lobed near apex; valves smooth, crested. |
5–9 mm wide, sometimes weakly lobed at apex; valves viscid, smooth, horns lateral, prominent, erect, intermediate ridges absent. |
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2n | = 24. |
= 24. |
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Ceanothus lemmonii |
Ceanothus crassifolius |
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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; 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 2 (2 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. 98. | ||||
Parent taxa | Rhamnaceae > Ceanothus > subg. Ceanothus | Rhamnaceae > Ceanothus > subg. Cerastes | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 5: 192. (1889) — (as lemmoni) | Torrey: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 75. (1857) | ||||
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