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Bolinas ceanothus, Mason's ceanothus
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little-leaf ceanothus
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| Shrubs, 0.6–2 m. Stems erect to ascending, not rooting at nodes; branchlets dark brown, rigid, ± tomentulose. |
Shrubs, deciduous, 1–2.5 m. Stems ± erect or ascending, not rooting at nodes; branchlets green, not thorn-tipped, round in cross section, flexible, tomentulose, glabrescent. |
not fascicled; petiole 1–2 mm; blade flat, usually elliptic or oval, sometimes suborbiculate, 7–21 × 4–13 mm, base rounded to ± cuneate, margins not revolute, denticulate most of length, teeth 9–17, apex obtuse, rounded to truncate, abaxial surface pale green to grayish green, strigose on veins, glabrate, adaxial surface dark green, glabrous. |
not fascicled; petiole 1.5–5 mm; blade flat, oblong-elliptic to elliptic, 6–25 × 3–13 mm, base cuneate, margins usually entire, sometimes denticulate distally, teeth 3–5, apex acute to obtuse, abaxial surface pale green, usually glabrous, veins sometimes strigillose, adaxial surface green, ± shiny, glabrous; pinnately veined or ± 3-veined from base. |
axillary, 1–2.5 cm. |
axillary, racemelike, 3–8 cm. |
sepals, petals, and nectary deep blue to purple. |
sepals and petals pale to deep blue; nectary blue. |
3–4 mm wide, not lobed; valves smooth, horns apical, minute, not rugose, intermediate ridges absent. |
4–5 mm wide, usually not lobed, sometimes weakly lobed; valves smooth, weakly viscid, usually not crested, sometimes weakly crested. |
= 24. |
= 24. |
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| Flowering Feb–Apr. |
Flowering May–Jul. |
| Soils derived from serpentine, chaparral, pine forests. |
Open sites and flats, conifer forests. |
| 100–500 m. (300–1600 ft.) |
1300–2100 m. (4300–6900 ft.) |
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CA
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CA
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Ceanothus masonii occurs only at a few localities on Bolinas Ridge, Marin County. With the exception of its leaf morphology, it bears a close resemblance to C. gloriosus var. exaltatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Ceanothus parvifolius is restricted to the western slope of the Sierra Nevada from Plumas County south to Tulare County. Putative hybrids with C. cordulatus have been reported (H. McMinn 1944). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 12, p. 103. |
FNA vol. 12, p. 84. |
| Rhamnaceae > Ceanothus > subg. Cerastes |
Rhamnaceae > Ceanothus > subg. Ceanothus |
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. 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. 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 |
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C. integerrimus var. parvifolius |
| McMinn: Madroño 6: 171. (1942) |
Trelease: Proc. Calif. Acad. Sci., ser. 2, 1: 110. (1888) |
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CA
WildflowerSearch
iNaturalist
USDA Plants Database
