Flora of North America species comparison

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Arctostaphylos nevadensis

Arctostaphylos montaraensis

pine mat manzanita

Montara manzanita
Habit Shrubs, prostrate or mound-forming, 0.1–0.5 m; burl absent or basal, sometimes epicormic; twigs sparsely short-hairy. Shrubs, erect or mound-forming, 0.5–5 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs.
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.

petiole to 2 mm;

blade light green, dull, ovate, 2.5–4.5 × 1.5–2.5 cm, base auriculate-clasping, margins entire, plane, surfaces ± scabrous, sparsely glandular-puberulent.
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.

panicles, 4–6-branched;

immature inflorescence pendent, (branches densely clustered, sessile), axis 1–1.5 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs;

bracts not appressed, leaflike, lanceolate, 6–9 mm, apex acuminate, surfaces finely glandular-hairy.
Pedicels

3–5 mm, glabrous.

5–6 mm, finely glandular-hairy.
Flowers

corolla white, urceolate;

ovary glabrous.

corolla white, urceolate;

ovary finely glandular-hairy.
Fruits

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

depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid).
Stones

distinct.

distinct.
2n

= 26.

Arctostaphylos nevadensis

Arctostaphylos montaraensis
Phenology Flowering winter–early spring.
Habitat Maritime chaparral
Elevation 100-500 m (300-1600 ft)
Distribution
from FNA
CA; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

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

Of conservation concern.

Arctostaphylos montaraensis grows mostly on granitic rocks at Montara Mountain and sandstones at San Bruno Mountain, northern San Mateo County.

(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. 434.
Parent taxa Ericaceae > subfam. Arbutoideae > Arctostaphylos Ericaceae > subfam. Arbutoideae > Arctostaphylos
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. 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. montereyensis, A. morroensis, A. myrtifolia, A. nevadensis, 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
Subordinate taxa
A. nevadensis subsp. knightii, A. nevadensis subsp. nevadensis
Synonyms A. imbricata subsp. montaraensis
Name authority A. Gray: in A. Gray et al., Syn. Fl. N. Amer. 2: 27. 1878 , Roof: Four Seasons 2(3): 8, figs. pp. 8, 10, 11. 1967 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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