Arctostaphylos franciscana

Eastwood

Bull. Torrey Bot. Club 32: 201. 1905,.

EndemicConservation concern
Synonyms: Arctostaphylos hookeri subsp. franciscana (Eastwood) Munz
Treatment appears in FNA Volume 8. Treatment on page 425. Mentioned on page 410, 411.

Shrubs, prostrate or mat-forming, 0.2–1.5 m; burl absent; twigs gray-hairy. Leaves: petiole 3–5 mm, (eglandular); blade bright green, shiny, oblanceolate, 1.5–2 × 0.5–1 cm, base cuneate, margins entire, plane, surfaces smooth, ± puberulent, glabrescent. Inflorescences panicles, 1–3-branched; immature inflorescence pendent, (branches compact), axis 0.5–1 cm, 1+ mm diam., gray-hairy; bracts appressed, scalelike (basalmost leaflike), awl-shaped, (concave when fresh), 3–4 mm, apex acute, surfaces glabrous. Pedicels 2–6 mm, glabrous. Flowers: corolla white to pink, urceolate; ovary canescent. Fruits globose, 6–8 mm diam., glabrous. Stones distinct. 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Maritime chaparral, serpentine soils
Elevation: 0-100 m

Discussion

Of conservation concern.

Formerly found in the northwestern portions of San Francisco, Arctostaphylos franciscana is now extirpated from the wild and survives only in cultivation.

Arctostaphylos franciscana is in the Center for Plant Conservation’s National Collection of Endangered Plants as A. hookeri subsp. franciscana.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
gray-hairy +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
cuneate +
bright green +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblanceolate +
coriaceous +
0.5cm;1cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
awl--shaped +  and scale-like +
white +  and pink +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
0-100 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
globose +
Maritime chaparral, serpentine soils +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
reduced +
not sticky +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
Bull. Torrey Bot. Club +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
Endemic +  and Conservation concern +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
glabrous +, glabrescent +  and puberulent +
Arctostaphylos hookeri subsp. franciscana +
Arctostaphylos franciscana +
Arctostaphylos +
species +
gray-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
shrub +, mat-forming +  and prostrate +
heterotrophic +, autotrophic +  and mycotrophic +