Arctostaphylos crustacea

Eastwood

Leafl. W. Bot. 1: 74. 1933 ,.

Common names: Brittleleaf manzanita
Synonyms: Arctostaphylos tomentosa subsp. crustacea (Eastwood) P. V. Wells
Treatment appears in FNA Volume 8. Treatment on page 440. Mentioned on page 406, 409, 441.

Shrubs, erect, 1–3 m; burl present; twigs sparsely to densely short-hairy, sometimes glandular or long-hairy. Leaves bifacial in stomatal distribution; petiole 2–5 mm; blade dull light green abaxially, shiny dark green adaxially, oblong-ovate to oblong-lanceolate, 2–5 × 1.5–2.5 cm, base truncate to ± lobed, margins entire (sometimes toothed), sometimes cupped or ± revolute, abaxial surface smooth, glabrous or sparsely or finely tomentose, adaxial surface smooth, ± glabrous (sometimes densely tomentose). Inflorescences panicles, 2–8-branched; immature inflorescence pendent, rarely ascending, branches spreading, axis 1–2.5 cm, 1+ mm diam., sparsely to densely short-hairy, sometimes glandular, or long-hairy eglandular; bracts not appressed, proximal leaflike, distal often scalelike, from scalelike and awl-like to broadly leaflike and deltate to lanceolate, 3–8 mm, apex acute, surfaces glabrous or hairy. Pedicels 2–5 mm, glabrous or short-hairy. Flowers: corolla white, conic to urceolate; ovary white-hairy or glabrous. Fruits depressed-globose, 6–10 mm diam., glabrous or sparsely hairy. Stones distinct.

Discussion

Subspecies 6 (6 in the flora).

Arctostaphylos crustacea comprises populations from central California and the Channel Islands in areas moderated by summer maritime fog. One subspecies is widespread, from the San Francisco Bay area to the Channel Islands; the others are limited in distribution.

Selected References

None.

Key

1 Twigs, abaxial surface of leaf blades, and immature inflorescence axes densely glandular- hairy Arctostaphylos crustacea subsp. subcordata
1 Twigs, abaxial surface of leaf blades, and immature inflorescence axes glabrous or hairy, sometimes glandular (not densely glandular-hairy) > 2
2 Twigs short-hairy and with longer hairs > 3
2 Twigs usually short-hairy (without longer hairs) > 4
3 Leaf blades ± glabrous or sparsely short-hairy abaxially. Arctostaphylos crustacea subsp. crustacea
3 Leaf blades densely short-hairy abaxially (and sometimes adaxially). Arctostaphylos crustacea subsp. crinita
4 Leaf blades tomentose abaxially. Arctostaphylos crustacea subsp. insulicola
4 Leaf blades glabrous abaxially > 5
5 Ovaries glabrous. Arctostaphylos crustacea subsp. eastwoodiana
5 Ovaries densely hairy. Arctostaphylos crustacea subsp. rosei

"entire" is not a number.

... more about "Arctostaphylos crustacea"
Acute (?) +, Deltate (?) +  and Lanceolate (?) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Eastwood +
eglandular +, long-hairy +  and glandular +
short-hairy +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
truncate;more or less lobed +
dark green +  and light green +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
shiny +  and dull +
oblong-ovate;oblong-lanceolate +
coriaceous +
1.5cm;2.5cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
lanceolate +, ovate +, deltate +, keeled +  and scale-like +
Brittleleaf manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
undifferentiated +
fusiform +
stonelike +
indehiscent +
hairy +  and glabrous +
depressed-globose +
multicellular +
ascending +  and pendent +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
tomentose +, or +, glabrous +  and smooth +
parietal +, axile +  and placentation +
glabrous +  and white-hairy +
tenuinucellate +  and unitegmic +
short-hairy +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
reduced +
not sticky +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
4-5-carpellate +
Leafl. W. Bot. +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
hairy +  and glabrous +
Arctostaphylos tomentosa subsp. crustacea +
Arctostaphylos crustacea +
Arctostaphylos +
species +
long-hairy +, glandular +  and short-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +