Arctostaphylos patula

Greene

Pittonia 2: 171. 1891 ,.

Common names: Greenleaf manzanita
Illustrated
Synonyms: Arctostaphylos acutifolia Eastwood Arctostaphylos parryana var. pinetorum (Rollins) Wieslander & B. Schreiber Arctostaphylos patula var. coalescens W. Knight Arctostaphylos patula subsp. platyphylla (A. Gray) P. V. Wells Arctostaphylos platyphylla
Treatment appears in FNA Volume 8. Treatment on page 416. Mentioned on page 409, 410, 412, 415, 435, 438.

Shrubs, erect or mound-forming, 1–3 m; burl usually absent, sometimes flat, obscure; twigs usually densely short-hairy with golden glands on tips of hairs, rarely short white-hairy and eglandular. Leaves: petiole 7–15 mm; blade bright green (lightly gray-green if short-hairy), shiny, widely ovate to orbiculate, 2.5–6 × 1.5–4 cm, base rounded, truncate, or slightly lobed, (not clasping), margins entire, plane, surfaces smooth, glabrous or, rarely, short-hairy. Inflorescences panicles, 2–8-branched; immature inflorescence pendent, branches spreading, axis 1.5–3 cm, 1+ mm diam., hairy with golden glands on tips of hairs or short-hairy and eglandular; bracts appressed with incurved tips, scalelike, deltate, 4–6 mm, apex acuminate, surfaces usually densely tomentose with golden glands on tips of hairs, rarely short white-hairy and eglandular. Pedicels 2–7 mm, glabrous or white-hairy. Flowers: corolla mostly pink, conic to urceolate; ovary glabrous or white-hairy. Fruits depressed-globose, sometimes subglobose, 7–10 mm diam., glabrous. Stones distinct. 2n = 26.


Phenology: Flowering late spring–early summer.
Habitat: Mountain chaparral and forests
Elevation: 400-3000 m

Distribution

V8 771-distribution-map.gif

Ariz., Calif., Colo., Mont., Nev., Oreg., Utah, Wash., Mexico (Baja California)

Discussion

Arctostaphylos patula is abundant and widespread in western North America as a dominant in montane chaparral, pine forest gaps, and high-elevation arid-steppe and canyon-land environments. Populations throughout western North America are characterized by twigs and inflorescence parts covered with relatively short hairs tipped with golden glands. In the central to northern Sierra Nevada, mixed with the widespread form are individuals that are eglandular and have a cover of relatively short, whitish hairs on the stems and inflorescences. Similarly, throughout most of its range, A. patula is nonsprouting after fire, and in areas characterized by winter snow cover it layers and creates broad, low mounds. In much of California, it typically sprouts after fires from obscure and flattened burls, forming circles of erect sprouts.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Arctostaphylos patula"
V. Thomas Parker +, Michael C. Vasey +  and Jon E. Keeley +
Greene +
short-hairy +  and hairy +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
not furrowed +
gray +  and reddish +
persistent +
exfoliating +
lobed;truncate;lobed;truncate;rounded +
bright green +
2.5 cm25 mm <br />0.025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
widely ovate;orbiculate +
coriaceous +
1.5cm;4cm +
not imbricate +  and imbricate +
hue +, light-brown +  and tan +
persistent +
deltate +  and scale-like +
Greenleaf manzanita +
rotate to crateriform campanulate cylindric globose or urceolate +
Ariz. +, Calif. +, Colo. +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Mexico (Baja California) +
brown +, reddish-brown +  and red +
depressed-globose +  and globose +
400-3000 m +
undifferentiated +
fusiform +
stonelike +
indehiscent +
subglobose;depressed-globose +
Mountain chaparral and forests +
multicellular +
opposite +, whorled +  and alternate +
pubescence +  and color +
persistent +
parietal +, axile +  and placentation +
white-hairy +  and glabrous +
tenuinucellate +  and unitegmic +
white-hairy +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
reduced +
not sticky +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering late spring–early summer. +
4-5-carpellate +
not +  and connate +
connate +  and distinct +
globose +
persistent +
distinct +
ovate +  and deltate +
Illustrated +
prostrate +  and erect +
peltate +  and capitate +
distinct +
straight +
white-hairy +, tomentose +, short-hairy +, , +  and glabrous +
Arctostaphylos acutifolia +, Arctostaphylos parryana var. pinetorum +, Arctostaphylos patula var. coalescens +, Arctostaphylos patula subsp. platyphylla +  and Arctostaphylos platyphylla +
Arctostaphylos patula +
Arctostaphylos +
species +
white-hairy +  and short-hairy +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
shrub +  and mound-forming +
heterotrophic +, autotrophic +  and mycotrophic +