Arctostaphylos viridissima

(Eastwood) McMinn

Man. Calif. Shrubs, 419. 1939 ,.

Common names: Whitehair manzanita
EndemicConservation concern
Basionyms: Arctostaphylos pechoensis var. viridissima Eastwood Leafl. W. Bot. 1: 62. 1933
Treatment appears in FNA Volume 8. Treatment on page 433. Mentioned on page 413.

Shrubs, erect, 1–4 m; burl absent; twigs short-hairy with longer, white hairs. Leaves: petiole 1–4 mm; blade dark green, shiny, narrowly ovate to oblong-ovate, 2–3.5 × 1.5–2.5 cm, base truncate to ± auriculate-clasping, margins entire, plane, surfaces smooth, puberulent, glabrescent. Inflorescences racemes, simple or 1-branched; immature inflorescence pendent, (branches ± concealed by bracts), axis 1–1.5 cm, 1+ mm diam., short-hairy with long, white hairs; bracts not appressed, (crowded), leaflike, lanceolate, 6–10 mm, apex acute, surfaces lightly hairy. Pedicels 2–3 mm, sparsely hairy. Flowers: corolla white, conic to urceolate; ovary densely white-hairy. Fruits subglobose, 10–15 mm diam., sparsely hairy or glabrous. Stones distinct. 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Island chaparral, open forests
Elevation: 100-600 m

Discussion

Of conservation concern.

Arctostaphylos viridissima is known from siliceous shale on the eastern part of Santa Cruz Island.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
(Eastwood) McMinn +
short-hairy +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
truncate;more or less auriculate-clasping +
Arctostaphylos pechoensis var. viridissima +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
narrowly ovate;oblong-ovate +
coriaceous +
1.5cm;2.5cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
lanceolate +
Whitehair manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
100-600 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
glabrous +  and hairy +
subglobose +
Island chaparral, open forests +
multicellular +
long +  and longer +
1-branched +  and simple +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
white-hairy +
tenuinucellate +  and unitegmic +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
reduced +
not sticky +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
Man. Calif. Shrubs, +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
Endemic +  and Conservation concern +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
hairy +, glabrescent +  and puberulent +
Undefined tribe Arbuteae +
Arctostaphylos viridissima +
Arctostaphylos +
species +
short-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +