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lakeside ceanothus, San Diego buckbrush
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holly-leaf 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, 1–2 m. Stems erect to ascending, not rooting at nodes; branchlets reddish brown, sometimes glaucescent, rigid, glabrate. |
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, spreading to deflexed; petiole 0–2 mm; blade ± cupped, folded lengthwise adaxially, widely elliptic to widely obovate, 12–25 × 7–20 mm, base obtuse to cuneate, margins not revolute, spinose-dentate, teeth 7–15, apex rounded to sharply acute, abaxial surface pale green, sparsely strigillose, especially on veins, adaxial surface green to dark green, glabrous. |
terminal, paniclelike, 15–30(–40) cm. |
axillary, 1.2–2.5 cm. |
sepals, petals, and nectary deep blue. |
sepals, petals, and nectary deep blue to purple. |
3–5 mm wide, deeply lobed; valves smooth, weakly crested. |
4–5 mm wide, lobed; valves smooth, horns subapical, prominent, slender, erect, intermediate ridges absent. |
= 24. |
= 24. |
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| Flowering Apr–Jun. |
Flowering Feb–Apr. |
| Rocky or gravelly slopes, chaparral. |
Rocky slopes and outcrops derived from volcanic substrates, chaparral, oak woodlands. |
| 40–600 m. (100–2000 ft.) |
100–400 m. (300–1300 ft.) |
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CA; Mexico (Baja California)
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CA
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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 purpureus is endemic to the Vaca Mountains (Napa and Solano counties); it has been confused with C. jepsonii, which differs by its 6–8-merous flowers, rugose capsule horns, prominent ridges between the horns, and distribution on serpentine soils. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 12, p. 90. |
FNA vol. 12, p. 106. |
| 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. roderickii, C. sanguineus, C. sonomensis, C. spinosus, C. thyrsiflorus, C. tomentosus, C. velutinus, C. verrucosus |
| Eastwood: Proc. Calif. Acad. Sci., ser. 4, 16: 361. (1927) |
Jepson: Fl. W. Calif., 258. (1901) — (as purpurea) |
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CA
WildflowerSearch
iNaturalist
USDA Plants Database
