Arctostaphylos sensitiva

Jepson

Madroño 1: 85. 1922 ,.

Common names: Coinleaf manzanita
Synonyms: Arctostaphylos nummularia subsp. sensitiva (Jepson) P. V. Wells Arctostaphylos nummularia var. sensitiva (Jepson) McMinn
Treatment appears in FNA Volume 8. Treatment on page 418. Mentioned on page 406, 407, 410.

Shrubs, erect or mound-forming, 1–2 m; burl absent; bark on older stems red, smooth; twigs densely short-haired with longer gland-tipped hairs. Leaves bifacial in stomatal distribution; petiole 1–3 mm; blade light green abaxially, dark green adaxially, shiny, orbiculate to orbiculate-ovate, 1–2.2 × 0.8–1.8 cm, base truncate to ± lobed, margins entire, cupped, surfaces smooth, glabrous, midvein hairy. Inflorescences panicles, 4–8-branched; immature inflorescence pendent, branches spreading, axis 0.5–1 cm, to 1 mm diam., densely short-hairy with longer gland-tipped hairs; bracts appressed, scalelike, deltate, 0.5–2 mm, apex acute, surfaces glabrous. Pedicels 3–5 mm, glabrous. Flowers 4-merous; corolla white to pink, urceolate; ovary white-hairy. Fruits subcylindric, 3–4 mm diam., glabrous. Stones distinct (breaking apart in mature fruit). 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast
Elevation: 100-600 m

Discussion

Of conservation concern.

Arctostaphylos sensitiva occurs in Marin, San Mateo, and Santa Cruz counties.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Arctostaphylos sensitiva"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Jepson +
0mm +  and 1mm +
short-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 +
truncate;more or less lobed +
dark green +  and light green +
1 cm10 mm <br />0.01 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
orbiculate;orbiculate-ovate +
coriaceous +
0.8cm;1.8cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
deltate +  and scale-like +
Coinleaf manzanita +
white +  and pink +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
100-600 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
subcylindric +
Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
white-hairy +
tenuinucellate +  and unitegmic +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
reduced +
not sticky +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 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 +
Arctostaphylos nummularia subsp. sensitiva +  and Arctostaphylos nummularia var. sensitiva +
Arctostaphylos sensitiva +
Arctostaphylos +
species +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
shrub +  and mound-forming +
heterotrophic +, autotrophic +  and mycotrophic +