Ceanothus cuneatus |
Ceanothus gloriosus |
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buck brush, common buckbrush, narrow-leaf buckthorn, sedge-leaf buckthorn, wedgeleaf cuneatus |
glory mat, Point Reyes ceanothus |
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Habit | 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. | Shrubs, 0.1–3 m, matlike to moundlike. | ||||||||||||||||||||
Stems | prostrate, spreading, ascending, or erect, sometimes rooting at proximal nodes; branchlets green to brown or reddish brown, flexible to rigid, strigillose or tomentulose. |
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Leaves | 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. |
not fascicled, not crowded; petiole 1–4 mm; blade flat to ± cupped or folded lengthwise adaxially, widely elliptic, obovate, or suborbiculate, 10–40(–45) × 5–24 mm, base cuneate to ± rounded, margins not revolute, sometimes slightly thickened, dentate to denticulate most of length, teeth 9–35, apex rounded, truncate, or retuse, abaxial surface pale green, sparsely strigillose or glabrate, adaxial surface dark green, ± shiny, glabrous. |
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Inflorescences | axillary or terminal, 0.8–2.5 cm. |
axillary, 0.9–2.5 cm. |
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Flowers | sepals, petals, and nectary white to lavender or blue. |
sepals, petals, and nectary deep blue to bluish purple. |
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Capsules | 4–6 mm wide, weakly lobed; valves smooth, horns subapical, prominent, erect, intermediate ridges absent. |
4–6 mm wide, lobed; valves usually smooth, sometimes rugulose or crested distal to middle, horns subapical, minute, not rugose, intermediate ridges absent. |
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Ceanothus cuneatus |
Ceanothus gloriosus |
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Distribution |
CA; OR; nw Mexico
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CA
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Discussion | Varieties 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 3 (3 in the flora). Ceanothus gloriosus is composed of three varieties occurring along the northern California coast from Humboldt County to Marin County. Variety gloriosus and var. porrectus generally differ primarily by leaf shape, length and width, and the number of marginal teeth. Variety exaltatus differs from the other two varieties primarily in stature. Complex hybrids with C. cuneatus var. ramulosus, C. divergens, and C. sonomensis were studied by J. T. Howell (1940). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 12, p. 99. | FNA vol. 12, p. 102. | ||||||||||||||||||||
Parent taxa | Rhamnaceae > Ceanothus > subg. Cerastes | Rhamnaceae > Ceanothus > subg. Cerastes | ||||||||||||||||||||
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Subordinate taxa | ||||||||||||||||||||||
Synonyms | Rhamnus cuneata | |||||||||||||||||||||
Name authority | (Hooker) Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 267. (1838) | J. T. Howell: Leafl. W. Bot. 2: 43. (1937) | ||||||||||||||||||||
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