Arctostaphylos canescens subsp. sonomensis

(Eastwood) P. V. Wells

Madroño 35: 333. 1989 ,.

Common names: Sonoma manzanita
Endemic
Basionyms: Arctostaphylos sonomensis Eastwood Leafl. W. Bot. 1: 78. 1933
Synonyms: Arctostaphylos canescens var. sonomensis (Eastwood) J. E. Adams ex McMinn
Treatment appears in FNA Volume 8. Treatment on page 429.

Twigs softly white-hairy and glandular-hairy. Immature inflorescence axes glandular-hairy. Pedicels glandular-hairy. Fruits glandular-hairy.


Phenology: Flowering early winter–late spring.
Habitat: Chaparral, open forests
Elevation: 400-1700 m

Discussion

Subspecies sonomensis is scattered in the North Coast Ranges from Santa Cruz County northward to Humboldt County, often in mixed populations with subsp. canescens. It was originally thought to be a rare subspecies; more intensive investigation may reveal individuals in populations throughout the range of the species.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
(Eastwood) P. V. Wells +
densely short-soft-hairy +  and white-tomentose +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
rounded;cuneate +
Arctostaphylos sonomensis +
whitish gray +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic;ovate;elliptic;ovate;orbiculate-ovate +
coriaceous +
1cm;3cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
wide-lanceolate +
Sonoma manzanita +
white +  and pink +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
400-1700 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
glandular-hairy +
depressed-globose +
Chaparral, open forests +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
white-hairy +
tenuinucellate +  and unitegmic +
glandular-hairy +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
reduced +
not sticky +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering early winter–late spring. +
4-5-carpellate +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
canescent +, glabrescent +  and gray-canescent +
Arctostaphylos canescens var. sonomensis +
Arctostaphylos canescens subsp. sonomensis +
Arctostaphylos canescens +
subspecies +
glandular-hairy +  and white-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +