Arctostaphylos virgata

Eastwood in C. S. Sargent

in C. S. Sargent, Trees & Shrubs 1: 203, plate 96. 1905 ,.

Common names: Marin manzanita
EndemicConservation concern
Treatment appears in FNA Volume 8. Treatment on page 426. Mentioned on page 414.

Shrubs, erect, 1–5 m; burl absent; twigs densely glandular-hairy. Leaves: petiole 2–4 mm; blade bright green, ± shiny, narrowly oblong-ovate to oblong-lanceolate, 3–5 × 1–2.5 cm, base truncate to slightly lobed, margins entire, plane, surfaces papillate, sparsely glandular-hairy. Inflorescences racemes, simple or 1-branched; immature inflorescence pendent, (concealed by bracts), axis 1.5–2 cm, 1+ mm diam., densely glandular-hairy; bracts not appressed, (green), leaflike, linear-lanceolate, 8–20 mm, apex acuminate, surfaces densely glandular-hairy. Pedicels 3–8 mm, finely glandular-hairy. Flowers: corolla white, conic to urceolate; ovary glandular-hairy. Fruits depressed-globose, 6–8 mm diam., finely glandular-hairy, (viscid). Stones distinct. 2n = 26.


Phenology: Flowering early winter–early spring.
Habitat: Maritime chaparral, open, closed-cone conifer forests
Elevation: 0-500 m

Discussion

Of conservation concern.

Arctostaphylos virgata is associated mostly with Pinus muricata on the Point Reyes peninsula; populations are found at nearby sites from Bolinas Ridge, Muir Woods, and San Geronimo Ridge, Marin County.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Arctostaphylos virgata"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood in C. S. Sargent +
glandular-hairy +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
truncate;slightly lobed +
bright green +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
narrowly oblong-ovate;oblong-lanceolate +
coriaceous +
1cm;2.5cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
linear-lanceolate +
Marin manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
0-500 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
glandular-hairy +
depressed-globose +
Maritime chaparral, open, closed-cone conifer forests +
multicellular +
1-branched +  and simple +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
glandular-hairy +
tenuinucellate +  and unitegmic +
glandular-hairy +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
reduced +
not sticky +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering early winter–early spring. +
4-5-carpellate +
in C. S. Sargent, Trees & 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 +
glandular-hairy +
papillate +
Undefined tribe Arbuteae +
Arctostaphylos virgata +
Arctostaphylos +
species +
glandular-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +