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lakeside ceanothus, San Diego buckbrush
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Sonoma ceanothus
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| Shrubs, evergreen, 2–5 m. Stems erect, not rooting at nodes; branchlets light green, not thorn-tipped, angled in cross section, flexible, often tuberculate (tubercles minute, brownish), puberulent, glabrescent. |
Shrubs, 0.5–1 m, often moundlike. |
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erect to ascending, not rooting at nodes; branchlets gray to grayish brown, rigid, strigillose, glabrescent. |
petiole 2–6 mm; blade flat, ovate-elliptic, 20–50 × 15–20 mm, base rounded, margins usually denticulate to serrulate, rarely entire, not revolute, teeth 23–58, apex acute to obtuse, abaxial surface pale green, veins puberulent, adaxial surface dark green, glabrous or sparsely puberulent; 3-veined from base. |
not fascicled; petiole 0–1 mm; blade cupped, widely obovate to suborbiculate, 5–12 × 2–10 mm, base cuneate, margins not revolute, wavy, spinose-dentate, teeth 2–4, apex widely notched; abaxial surface pale green or grayish green and glaucous, strigillose on veins, adaxial surface shiny green, glabrous. |
terminal, paniclelike, 15–30(–40) cm. |
axillary or terminal, 0.8–1.5 cm. |
sepals, petals, and nectary deep blue. |
sepals, petals, and nectary blue to lavender. |
3–5 mm wide, deeply lobed; valves smooth, weakly crested. |
4–5 mm wide, usually not, sometimes weakly lobed; valves smooth, horns subapical, minute to ± prominent, erect, intermediate ridges absent. |
= 24. |
= 24. |
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| Flowering Apr–Jun. |
Flowering Mar–Apr. |
| Rocky or gravelly slopes, chaparral. |
Sandy to rocky soils derived mostly from volcanic substrates, slopes, ridges, chaparral. |
| 40–600 m. (100–2000 ft.) |
100–700 m. (300–2300 ft.) |
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CA; Mexico (Baja California)
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CA |
Ceanothus cyaneus is known in the flora area only from San Diego County, and is threatened throughout its range. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Ceanothus sonomensis is distinctive in having spinose-dentate, few-toothed leaves, and slender fruit horns two to three millimeters; it occurs at a few scattered localities in the mountains of Napa and Sonoma counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 12, p. 90. |
FNA vol. 12, p. 103. |
| Rhamnaceae > Ceanothus > subg. Ceanothus |
Rhamnaceae > Ceanothus > subg. Cerastes |
C. americanus, C. arboreus, C. arcuatus, C. confusus, C. cordulatus, C. crassifolius, C. cuneatus, C. dentatus, C. divergens, C. diversifolius, C. fendleri, C. ferrisiae, C. foliosus, C. fresnensis, C. gloriosus, C. griseus, C. hearstiorum, C. herbaceus, C. impressus, C. incanus, C. integerrimus, C. jepsonii, C. lemmonii, C. leucodermis, C. maritimus, C. martini, C. masonii, C. megacarpus, C. microphyllus, C. oliganthus, C. ophiochilus, C. otayensis, C. palmeri, C. papillosus, C. parryi, C. parvifolius, C. pauciflorus, C. perplexans, C. pinetorum, C. prostratus, C. pumilus, C. purpureus, C. roderickii, C. sanguineus, C. sonomensis, C. spinosus, C. thyrsiflorus, C. tomentosus, C. velutinus, C. verrucosus |
C. americanus, C. arboreus, C. arcuatus, C. confusus, C. cordulatus, C. crassifolius, C. cuneatus, C. cyaneus, C. dentatus, C. divergens, C. diversifolius, C. fendleri, C. ferrisiae, C. foliosus, C. fresnensis, C. gloriosus, C. griseus, C. hearstiorum, C. herbaceus, C. impressus, C. incanus, C. integerrimus, C. jepsonii, C. lemmonii, C. leucodermis, C. maritimus, C. martini, C. masonii, C. megacarpus, C. microphyllus, C. oliganthus, C. ophiochilus, C. otayensis, C. palmeri, C. papillosus, C. parryi, C. parvifolius, C. pauciflorus, C. perplexans, C. pinetorum, C. prostratus, C. pumilus, C. purpureus, C. roderickii, C. sanguineus, C. spinosus, C. thyrsiflorus, C. tomentosus, C. velutinus, C. verrucosus |
| Eastwood: Proc. Calif. Acad. Sci., ser. 4, 16: 361. (1927) |
J. T. Howell: Leafl. W. Bot. 2: 162. (1939) |
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CA
WildflowerSearch
iNaturalist
USDA Plants Database
