Arctostaphylos confertiflora

Eastwood

Leafl. W. Bot. 1: 122. 1934 ,.

Common names: Santa Rosa Island manzanita
EndemicConservation concern
Synonyms: Arctostaphylos subcordata var. confertiflora (Eastwood) Munz
Treatment appears in FNA Volume 8. Treatment on page 428. Mentioned on page 414.

Shrubs, erect, prostrate, or mound-forming, 0.1–2 m; burl absent; twigs densely short-hairy with long, white, glandular-hairs. Leaves (overlapping); petiole 4–10 mm; blade light green, dull, ovate to elliptic, 4–6 × 2–3 cm, base cuneate to ± rounded, margins entire, cupped, surfaces ± papillate, finely scabrous, glandular-puberulent, ± glandular-hairy proximally. Inflorescences panicles, 3–5-branched; immature inflorescence pendent, branches spreading, axis 1.5–2 cm, 1+ mm diam., densely short-hairy with long, white, glandular-hairs; bracts not appressed, (crowded), (± densely overlapping near tips), (green), leaflike, ovate to oblanceolate, 8–18 mm, apex acute, surfaces finely glandular-hairy. Pedicels 3–5 mm, finely glandular-hairy. Flowers: corolla white, conic to urceolate; ovary densely white-hairy, sparsely glandular. Fruits depressed-globose, 8–11 mm diam., sparsely hairy. Stones distinct. 2n = 26.


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

Discussion

Of conservation concern.

Arctostaphylos confertiflora is found on Santa Rosa Island.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
short-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 +
cuneate;more or less rounded +
light green +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate;elliptic +
coriaceous +
2cm;3cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
ovate +  and oblanceolate +
Santa Rosa Island 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 +
depressed-globose +
Island chaparral, open, closed-cone conifer forests +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
white-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 +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering winter–early spring. +
4-5-carpellate +
Leafl. W. Bot. +
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 glandular-puberulent +
papillate +
Arctostaphylos subcordata var. confertiflora +
Arctostaphylos confertiflora +
Arctostaphylos +
species +
short-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
shrub +, mound-forming +  and prostrate +
heterotrophic +, autotrophic +  and mycotrophic +