Arctostaphylos imbricata

Eastwood

Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 ,.

Common names: San Bruno Mountain manzanita
EndemicConservation concern
Synonyms: Arctostaphylos andersonii var. imbricata (Eastwood) J. E. Adams ex McMinn
Treatment appears in FNA Volume 8. Treatment on page 435. Mentioned on page 410.

Shrubs, prostrate or mat or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs. Leaves: petiole to 2 mm; blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy. Inflorescences panicles, 3–5-branched; immature inflorescence pendent, (branches densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs; bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy. Pedicels 3–5 mm, densely glandular-hairy. Flowers: corolla white, urceolate; ovary densely glandular-hairy. Fruits depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid). Stones distinct. 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Maritime chaparral on sandstone outcroppings
Elevation: 100-200 m

Discussion

Of conservation concern.

Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Arctostaphylos imbricata"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
fine-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 +
auriculate-clasping +
light green +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
orbiculate;orbiculate-ovate +
coriaceous +
2cm;3cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
San Bruno Mountain manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
100-200 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
glandular-hairy +
depressed-globose +
Maritime chaparral on sandstone outcroppings +
gland-tipped +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
mound-forming +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
parietal +, axile +  and placentation +
glandular-hairy +
tenuinucellate +  and unitegmic +
glandular-hairy +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
reduced +
not sticky +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
Proc. Calif. Acad. Sci., ser. +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
Endemic +  and Conservation concern +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
glandular-hairy +
papillate +
Arctostaphylos andersonii var. imbricata +
Arctostaphylos imbricata +
Arctostaphylos +
species +
fine-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +