Arctostaphylos manzanita subsp. laevigata

(Eastwood) Munz

Aliso 4: 95. 1958 ,.

Common names: Contra Costa manzanita
Endemic
Basionyms: Arctostaphylos laevigata Eastwood Leafl. W. Bot. 1: 76. 1933
Treatment appears in FNA Volume 8. Treatment on page 438. Mentioned on page 437.

Plants killed by fire; burl absent; twigs glabrous or sparsely short-hairy. Leaf-blades shiny green. Inflorescences: axis (few-branched), 1+ mm diam.; (branches to 15 mm in immature phase) Ovaries glabrous. Fruits glabrous. Stones distinct.


Phenology: Flowering winter–early spring.
Habitat: Chaparral, foothill woodlands
Elevation: 500-1100 m

Discussion

Subspecies laevigata is found on western (and possibly eastern) slopes of Mount Diablo, Contra Costa County. Plants resembling it occur in the southern North Coast Range in Napa and Solano counties but subtle features suggest that they are more closely allied with subsp. manzanita.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
(Eastwood) Munz +
not viscid +
glandular-hairy +, short-hairy +  and glabrous +
1.5 cm15 mm <br />0.015 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
rounded;more or less cuneate +
Arctostaphylos laevigata +
bright green +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
dull +  and shiny +
oblong-ovate;obovate +
coriaceous +
1cm;3.5cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
deltate +  and scale-like +
globose +
Contra Costa manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
500-1100 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
depressed-globose +
Chaparral, foothill woodlands +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
reduced +
not sticky +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
sparsely hairy +  and finely glandular-hairy +
Undefined tribe Arbuteae +
Arctostaphylos manzanita subsp. laevigata +
Arctostaphylos manzanita +
subspecies +
short-hairy +  and glabrous +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +