Ceanothus divergens

Parry

Proc. Davenport Acad. Nat. Sci. 5: 173. 1889.

Common names: Calistoga ceanothus
EndemicConservation concern
Treatment appears in FNA Volume 12. Treatment on page 103. Mentioned on page 78, 94, 95, 96, 102, 104, 105.

Shrubs, 0.5–1.5 m, sometimes moundlike. Stems erect to ascending, not rooting at nodes; branchlets brown to grayish brown, sometimes glaucous, ± flexible, glabrous or sparsely puberulent. Leaves not fascicled, spreading; petiole 0–2 mm; blade flat to ± cupped or weakly folded lengthwise, elliptic to ± oblong or obovate, 10–20 × 5–12 mm, base obtuse to cuneate, margins thick or slightly revolute, slightly wavy, spinose-dentate, teeth 5–9 (–11), apex sharply acute or retuse with an apical tooth, abaxial surface grayish green, veins strigillose, adaxial surface green, glabrous. Inflorescences axillary, 1.2–2.5 cm. Flowers: sepals and petals deep blue to purple; nectary dark blue or purple. Capsules 5–6 mm wide, lobed; valves smooth, crested, horns subapical, prominent, erect, intermediate ridges weakly developed. 2n = 24.


Phenology: Flowering Feb–Apr.
Habitat: Rocky soils apparently derived from serpentine or volcanic substrates, chaparral, oak and pine woodlands.
Elevation: 100–1000 m.

Discussion

Ceanothus divergens is restricted to a few localities in Napa and Sonoma counties.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Ceanothus divergens"
perigynous +  and epigynous +
Retuse (?) +  and Acute (?) +
Clifford L. Schmidt† +  and Dieter H. Wilken +
obtuse +  and cuneate +
Ceanothus sect. Cerastes +
3-veined +  and veined +
not gland-dotted +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
3[-5]-veined +  and pinnate +
spinulose +, spinose +, serrate +  and entire +
denticulate +, dentate +, crenulate +, crenate +  and serrulate +
elliptic;more or less oblong or obovate +
5mm;12mm +
not thorn-tipped +
puberulent +, glabrous +  and glaucous +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Calistoga ceanothus +
100–1000 m. +
Rocky soils apparently derived from serpentine or volcanic substrates, chaparral, oak and pine woodlands. +
subapical +
free +  and adnate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
unisexual +  and bisexual +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
deciduous +  and persistent +
purple;dark blue +
intrastaminal +
superior +  and inferior +
not fleshy +
perigynous +  and epigynous +
adnate +  and distinct +
6 +  and 5 +
Clawed (?) +, Obovate (?) +  and Spatulate (?) +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering Feb–Apr. +
2-4-carpellate +
Proc. Davenport Acad. Nat. Sci. +
intermediate +
blue +  and purple +
distinct +
spreading +  and incurved +
6 +  and 5 +
keeled;lanceolate;deltate +
Endemic +  and Conservation concern +
not rooting +
erect +  and ascending +
Ceanothus divergens +
Ceanothus subg. Cerastes +
species +
paniclelike +  and racemelike +
not gland-tipped +
crested +
strigillose +
unarmed +  and armed +
polygamous +, dioecious +  and synoecious +