Ceanothus ophiochilus

S. Boyd

T. S. Ross & Arnseth, Phytologia 70: 29, figs. 1–4. 1991.

Common names: Vail Lake ceanothus
EndemicConservation concern
Treatment appears in FNA Volume 12. Treatment on page 108. Mentioned on page 96, 98.

Shrubs, 1–2 m. Stems erect to ascending, not rooting at nodes; branchlets reddish-brown to gray, terete, ± flexible to rigid, glabrate. Leaves both fascicled and not fascicled on same plant; petiole 0–1 mm; blade folded lengthwise abaxially, narrowly oblanceolate to narrowly obovate, 3–7 × 1–3 mm, base cuneate, margins not revolute, usually entire, rarely denticulate near apex, teeth 1–4, apex obtuse, rounded, or cuspidate, abaxial surface pale green, glabrate, adaxial surface pale to yellowish green, glabrate. Inflorescences axillary or terminal, 0.7–2 cm. Flowers: sepals, petals, and nectary pale blue or pink-tinged. Capsules 3–4 mm wide, not lobed; valves smooth, horns minute or absent, intermediate ridges absent.


Phenology: Flowering Mar–Apr.
Habitat: Rocky soils from deeply weathered gabbro or pyroxene substrates, slopes and ridges, chaparral.
Elevation: 600–700 m.

Discussion

Ceanothus ophiochilus, known only from the northern part of the Palomar Mountains in southwestern Riverside County, is distinctive by having small, more or less terete, fascicled leaves; it is known to hybridize with C. crassifolius at one locality.

Ceanothus ophiochilus is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Ceanothus ophiochilus"
pale +  and yellowish green +
perigynous +  and epigynous +
Cuspidate (?) +, Rounded (?) +  and Obtuse (?) +
Clifford L. Schmidt† +  and Dieter H. Wilken +
S. Boyd +
cuneate +
Ceanothus sect. Cerastes +
3-veined +  and veined +
not gland-dotted +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
3[-5]-veined +  and pinnate +
spinulose +, spinose +, serrate +  and entire +
denticulate +, dentate +, crenulate +, crenate +  and serrulate +
narrowly oblanceolate;narrowly obovate +
1mm;3mm +
not thorn-tipped +
not lobed +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Vail Lake ceanothus +
600–700 m. +
Rocky soils from deeply weathered gabbro or pyroxene substrates, slopes and ridges, chaparral. +
minute +
free +  and adnate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
terminal +  and axillary +
unisexual +  and bisexual +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not fascicled +  and fascicled +
deciduous +  and persistent +
denticulate +
pink-tinged;pale 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 /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering Mar–Apr. +
2-4-carpellate +
T. S. Ross & Arnseth, Phytologia +
intermediate +
pink +, usually white +  and cream blue or purple +
distinct +
spreading +  and incurved +
6 +  and 5 +
keeled;lanceolate;deltate +
Endemic +  and Conservation concern +
not rooting +
erect +  and ascending +
Ceanothus ophiochilus +
Ceanothus subg. Cerastes +
species +
paniclelike +  and racemelike +
not gland-tipped +
unarmed +  and armed +
polygamous +, dioecious +  and synoecious +