FNA: Arctostaphylos auriculata vs. Arctostaphylos refugioensis

	Arctostaphylos auriculata	Arctostaphylos refugioensis
	Mount Diablo manzanita, Mt. Diablo manzanita	refugio manzanita
Habit	Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs.	Shrubs, erect, 2–4 m; burl absent; twigs densely short-hairy with longer, gland-tipped hairs.
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 2 mm; blade glaucous, dull, ovate to oblong-ovate, 3–4.5 × 2–3 cm, base distinctly lobed, auriculate-clasping, margins entire, plane, surfaces smooth, glabrous or midrib ± finely hairy.
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, 5–10-branched; immature inflorescence pendent, branches spreading (open, loose, with overlapping bracts), axis 2–3 cm, 1+ mm diam., densely short-hairy with longer, gland-tipped hairs; bracts not appressed, leaflike, ovate to wide-elliptic, 4–10 mm, apex acute, surfaces finely glandular-hairy.
Pedicels	4–10 mm, tomentose.	7–9 mm, finely glandular-hairy.
Flowers	corolla white to pink, conic; ovary densely white-hairy.	corolla white, conic to urceolate; ovary glabrous.
Fruits	depressed-globose, 5–10 mm diam., short white-hairy, glabrescent.	globose, 10–15 mm diam., glabrous.
Stones	distinct.	connate into single sphere.
2n	= 26.	= 26.

	Arctostaphylos auriculata	Arctostaphylos refugioensis
Phenology	Flowering winter–early spring.	Flowering winter–early spring.
Habitat	Chaparral, open, closed-cone conifer forests	Chaparral
Elevation	300-500 m (1000-1600 ft)	400-600 m (1300-2000 ft)
Distribution	CA [BONAP county map]	CA [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 refugioensis is known from one population in Refugio Canyon in Santa Barbara County. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 8, p. 430.	FNA vol. 8, p. 431.
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. regismontana, 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 ,	Gankin: Four Seasons 2(2): 13, fig. p. 13. 1967 ,
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Arctostaphylos auriculata

Arctostaphylos refugioensis

Mount Diablo manzanita, Mt. Diablo manzanita

refugio manzanita

Habit

Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs.

Shrubs, erect, 2–4 m; burl absent; twigs densely short-hairy with longer, gland-tipped hairs.

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 2 mm;

blade glaucous, dull, ovate to oblong-ovate, 3–4.5 × 2–3 cm, base distinctly lobed, auriculate-clasping, margins entire, plane, surfaces smooth, glabrous or midrib ± finely hairy.

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, 5–10-branched;

immature inflorescence pendent, branches spreading (open, loose, with overlapping bracts), axis 2–3 cm, 1+ mm diam., densely short-hairy with longer, gland-tipped hairs;

bracts not appressed, leaflike, ovate to wide-elliptic, 4–10 mm, apex acute, surfaces finely glandular-hairy.

Pedicels

4–10 mm, tomentose.

7–9 mm, finely glandular-hairy.

Flowers

corolla white to pink, conic;

ovary densely white-hairy.

corolla white, conic to urceolate;

ovary glabrous.

Fruits

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

globose, 10–15 mm diam., glabrous.

Stones

distinct.

connate into single sphere.

= 26.

Arctostaphylos auriculata

Arctostaphylos refugioensis

Phenology

Flowering winter–early spring.

Habitat

Chaparral, open, closed-cone conifer forests

Chaparral

Elevation

300-500 m (1000-1600 ft)

400-600 m (1300-2000 ft)

Distribution

[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 refugioensis is known from one population in Refugio Canyon in Santa Barbara County.

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

Source

FNA vol. 8, p. 430.

FNA vol. 8, p. 431.

Parent taxa

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. regismontana, 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 ,

Gankin: Four Seasons 2(2): 13, fig. p. 13. 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).

Choose a data source: Flora of North America

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Flora of North America species comparison

Arctostaphylos auriculata

Arctostaphylos refugioensis

Arctostaphylos auriculata

Arctostaphylos refugioensis