Flora of North America species comparison

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Arctostaphylos auriculata

Arctostaphylos regismontana

Mount Diablo manzanita, Mt. Diablo manzanita

Kings Mountain manzanita
Habit Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. Shrubs or trees, erect, 2–5 m; burl absent; twigs densely glandular-hairy.
Leaves

petiole to 2 mm;

blade whitish gray, dull, oblong-ovate to orbiculate-ovate, 1.5–4.5 × 1.5–3 cm, base distinctly lobed, auriculate-clasping, margins entire, plane, surfaces smooth, gray-canescent, glabrescent.

petiole to 3 mm;

blade pale gray-green, dull, oblong-ovate, (boat-shaped, tip curved up), 3–6 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces smooth or ± finely scabrous, glandular-hairy, glabrescent, (viscid).
Inflorescences

panicles, 3–5-branched;

immature inflorescence pendent, (branches crowded, ± obscured by bracts), axis 1–1.5 cm, 1+ mm diam., densely white-hairy with long, white hairs;

bracts somewhat appressed, leaflike, ovate to lanceolate-ovate, 5–15 mm, apex acute, surfaces canescent.

panicles, 4–6-branched;

immature inflorescence pendent, (branches congested), axis 1.5–2 cm, 1+ mm diam., densely long glandular-hairy;

bracts not appressed, leaflike, narrowly oblong-lanceolate, 5–12 mm, apex acute, surfaces glandular-hairy.
Pedicels

4–10 mm, tomentose.

6–10 mm, finely glandular-hairy.
Flowers

corolla white to pink, conic;

ovary densely white-hairy.

corolla white, conic to urceolate;

ovary finely glandular-hairy.
Fruits

depressed-globose, 5–10 mm diam., short white-hairy, glabrescent.

depressed-globose, 6–8 mm diam., finely glandular-hairy.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos auriculata

Arctostaphylos regismontana
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Chaparral, open, closed-cone conifer forests Chaparral, margins of open forests
Elevation 300-500 m (1000-1600 ft) 100-600 m (300-2000 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos auriculata is found on the western slopes of Mount Diablo in Contra Costa County.

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

Of conservation concern.

Arctostaphylos regismontana is found in the vicinity of Kings Mountain in San Mateo County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 430. FNA vol. 8, p. 433.
Parent taxa Ericaceae > subfam. Arbutoideae > Arctostaphylos Ericaceae > subfam. Arbutoideae > Arctostaphylos
Sibling taxa
A. andersonii, 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. 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
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. 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. rudis, A. sensitiva, A. silvicola, A. stanfordiana, A. tomentosa, A. uva-ursi, A. virgata, A. viridissima, A. viscida
Name authority Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , Eastwood: Leafl. W. Bot. 1: 77. 1933 ,
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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