Arctostaphylos insularis

Greene ex Parry

Bull. Calif. Acad. Sci. 2: 494. 1887 ,.

Common names: Island manzanita
EndemicConservation concern
Synonyms: Arctostaphylos insularis var. pubescens Eastwood
Treatment appears in FNA Volume 8. Treatment on page 422. Mentioned on page 406, 408, 410.

Shrubs, erect, (arborescent), 2–5 m; burl absent; (lower stems reddish with glaucous patches); twigs glabrous, sometimes sparsely short-hairy or sparsely glandular-hairy. Leaves bifacial in stomatal distribution; petiole 4–8 mm; blade bright green, lustrous, oblongelliptic, 2.5–4.5 × 1–3 cm, base rounded, margins entire, ± cupped, surfaces smooth, glabrous. Inflorescences panicles, 5–10-branched; immature inflorescence pendent, branches spreading, ascending, or erect, axis 2–3 cm, 1+ mm diam., glabrous, sometimes sparsely short-hairy or sparsely glandular-hairy, (buds ± spread apart); bracts not appressed, scalelike, deltate, 1.5–3 mm, apex acute, surfaces finely glandular-hairy. Pedicels 6–9 mm, finely glandular-hairy. Flowers: corolla white, conic to urceolate; ovary glabrous or sparsely glandular-hairy. Fruits depressed-globose, 8–15 mm diam., sparsely hairy or glabrous. Stones distinct. 2n = 26.


Phenology: Flowering winter–early spring.
Habitat: Island chaparral and woodlands
Elevation: 200-400 m

Discussion

Of conservation concern.

Arctostaphylos insularis is known from Santa Cruz Island.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Arctostaphylos insularis"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Greene ex Parry +
glandular-hairy +, short-hairy +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
rounded +
bright green +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
oblongelliptic +
coriaceous +
1cm;3cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
deltate +  and scale-like +
erect;ascending;erect;ascending;spreading +
Island manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
200-400 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
glabrous +  and hairy +
depressed-globose +
Island chaparral and woodlands +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
glandular-hairy +  and glabrous +
tenuinucellate +  and unitegmic +
glandular-hairy +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
reduced +
not sticky +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
Bull. Calif. Acad. Sci. +
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 +  and glabrous +
Arctostaphylos insularis var. pubescens +
Arctostaphylos insularis +
Arctostaphylos +
species +
glandular-hairy +, short-hairy +  and glabrous +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +