Ceanothus leucodermis

Greene

Bull. Misc. Inform. Kew 1895: 15. 1895.

Common names: Chaparral whitethorn
Treatment appears in FNA Volume 12. Treatment on page 86. Mentioned on page 79, 89.

Shrubs, evergreen, 1.5–4 m. Stems erect, not rooting at nodes; branchlets light green or grayish green and glaucous, thorn-tipped, round in cross-section, rigid, glabrous. Leaves: petiole 3–7 mm; blade flat, ovate to oblongelliptic, 5–30 × 3–15 mm, base rounded to subcordate, margins usually entire to minutely glandular-serrulate, rarely serrate, glands 16–20, apex acute to obtuse, abaxial surface grayish green, glaucous, glabrous, adaxial surface green, ± glaucous, dull, usually glabrous, sometimes appressed villosulous; 3-veined from base. Inflorescences axillary, usually paniclelike, sometimes racemelike, (3–) 5–15 cm. Flowers: sepals, petals, and nectary white to blue. Capsules 3–5 mm wide, lobed; valves smooth, viscid, not crested. 2n = 24.


Phenology: Flowering Apr–Jun.
Habitat: Rocky slopes, chaparral, oak woodlands, conifer forests.
Elevation: 200–1800 m.

Distribution

V12 750-distribution-map.jpg

Calif., Mexico (Baja California)

Discussion

Ceanothus leucodermis is a common, often dominant species of chaparral in the mountains of central and southern California. This species is notable in producing serrate to serrulate leaves on stump sprouts following fire (M. Van Rensselaer and H. McMinn 1942). Putative hybrids and advanced generation intermediates with C. oliganthus occur throughout the southern Coast and Transverse ranges of California (McMinn 1944).

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Ceanothus leucodermis"
glabrous +  and glaucous +
villosulous +, glabrous +  and glaucous +
perigynous +  and epigynous +
Acute (?) +  and Obtuse (?) +
Clifford L. Schmidt† +  and Dieter H. Wilken +
Greene +
rounded +  and subcordate +
3-veined +  and veined +
not gland-dotted +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3[-5]-veined +  and pinnate +
spinulose +, spinose +, serrate +  and entire +
denticulate +, dentate +, crenulate +, crenate +  and serrulate +
ovate;oblongelliptic +
3mm;15mm +
glabrous +  and glaucous +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Chaparral whitethorn +
Calif. +  and Mexico (Baja California) +
200–1800 m. +
Rocky slopes, chaparral, oak woodlands, conifer forests. +
free +  and adnate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
unisexual +  and bisexual +
racemelike +  and paniclelike +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
deciduous +  and persistent +
serrate +, usually entire +  and minutely glandular-serrulate +
intrastaminal +
superior +  and inferior +
not fleshy +
perigynous +  and epigynous +
adnate +  and distinct +
6 +  and 5 +
Clawed (?) +, Obovate (?) +  and Spatulate (?) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering Apr–Jun. +
2-4-carpellate +
Bull. Misc. Inform. Kew +
pink +, usually white +  and cream blue or purple +
distinct +
spreading +  and incurved +
6 +  and 5 +
keeled;lanceolate;deltate +
not rooting +
3-veined +  and veined +
Ceanothus leucodermis +
Ceanothus subg. Ceanothus +
species +
paniclelike +  and racemelike +
gland-tipped +
not crested +
unarmed +  and armed +
polygamous +, dioecious +  and synoecious +