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pine mat manzanita

Photo is of parent taxon

pine-mat manzanita

Habit Shrubs, prostrate or mound-forming, 0.1–0.5 m; burl absent or basal, sometimes epicormic; twigs sparsely short-hairy. Plants killed by fire; burl absent.
Leaves

petiole 3–7 mm;

blade bright green, shiny, obovate or oblanceolate, 1–3 × 1–1.5 cm, base cuneate, margins entire, plane, surfaces smooth, puberulent, glabrescent.

Inflorescences

racemes, simple or 1-branched;

immature inflorescence pendent, (branches congested, globose), axis 0.5–1 cm, 1+ mm diam., sparsely short-hairy;

bracts not appressed, (green), scalelike, linear or linear-lanceolate, mostly 2–3 mm (some near base leaflike, 5–10 mm), apex acuminate, mucronate, surfaces glabrous or sparsely hairy, rarely finely glandular-hairy.

Pedicels

3–5 mm, glabrous.

Flowers

corolla white, urceolate;

ovary glabrous.

Fruits

(dark brown), globose, 6–8 mm diam., glabrous.

Stones

distinct.

2n

= 52.

Arctostaphylos nevadensis

Arctostaphylos nevadensis subsp. nevadensis

Phenology Flowering late spring.
Habitat High-elevation forests and montane chaparral
Elevation (600-)1500-2700 m ((2000-)4900-8900 ft)
Distribution
from FNA
CA; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR; WA
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Subspecies nevadensis occurs from the North Coast Ranges of California (Del Norte and Humboldt counties) and the Sierra Nevada through the Cascades of Oregon to the Wenatchee Mountains of central Washington. It hybridizes with Arctostaphylos patula. Some botanists have assumed A. parvifolia Howell is of hybrid origin of A. nevadensis × A. glandulosa.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Burls absent; plants killed by fire.
subsp. nevadensis
1. Burls basal or epicormic; plants resprouting after fire.
subsp. knightii
Source FNA vol. 8, p. 435. FNA vol. 8, p. 435.
Parent taxa Ericaceae > subfam. Arbutoideae > Arctostaphylos Ericaceae > subfam. Arbutoideae > Arctostaphylos > Arctostaphylos nevadensis
Sibling taxa
A. andersonii, A. auriculata, A. bakeri, A. canescens, A. catalinae, A. columbiana, A. confertiflora, A. crustacea, A. cruzensis, A. densiflora, A. edmundsii, A. franciscana, A. gabilanensis, A. glandulosa, A. glauca, A. glutinosa, A. hispidula, A. hookeri, A. hooveri, A. imbricata, A. insularis, A. klamathensis, A. luciana, A. malloryi, A. manzanita, A. mewukka, A. montana, A. montaraensis, A. montereyensis, A. morroensis, A. myrtifolia, A. nissenana, A. nortensis, A. nummularia, A. obispoensis, A. ohloneana, A. osoensis, A. otayensis, A. pacifica, A. pajaroensis, A. pallida, A. parryana, A. patula, A. pechoensis, A. pilosula, A. pringlei, A. pumila, A. pungens, A. purissima, A. rainbowensis, A. refugioensis, A. regismontana, A. rudis, A. sensitiva, A. silvicola, A. stanfordiana, A. tomentosa, A. uva-ursi, A. virgata, A. viridissima, A. viscida
A. nevadensis subsp. knightii
Subordinate taxa
A. nevadensis subsp. knightii, A. nevadensis subsp. nevadensis
Name authority A. Gray: in A. Gray et al., Syn. Fl. N. Amer. 2: 27. 1878 , unknown
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