FNA: Arctostaphylos purissima vs. Arctostaphylos virgata

	Arctostaphylos purissima	Arctostaphylos virgata
	La Purisima manzanita, La Purissima manzanita	Bolinas manzanita, Marin manzanita
Habit	Shrubs, erect, 1–4 m; burl absent; twigs densely short-hairy with longer hairs.	Shrubs, erect, 1–5 m; burl absent; twigs densely glandular-hairy.
Leaves	petiole to 2 mm; blade bright green, shiny, orbiculate-ovate to ± orbiculate, 1–2.5 × 1–2 cm, base auriculate-clasping, margins entire, plane, surfaces smooth, glabrous.	petiole 2–4 mm; blade bright green, ± shiny, narrowly oblong-ovate to oblong-lanceolate, 3–5 × 1–2.5 cm, base truncate to slightly lobed, margins entire, plane, surfaces papillate, sparsely glandular-hairy.
Inflorescences	racemes, simple or 1–2-branched; immature inflorescence pendent, (branches dense, concealed by bracts), axis 0.5–1 cm, 1+ mm diam., densely short-hairy with longer hairs; bracts not appressed, (overlapping), leaflike, ovate to lanceolate-ovate, 5–8 mm, apex acute, surfaces glabrous.	racemes, simple or 1-branched; immature inflorescence pendent, (concealed by bracts), axis 1.5–2 cm, 1+ mm diam., densely glandular-hairy; bracts not appressed, (green), leaflike, linear-lanceolate, 8–20 mm, apex acuminate, surfaces densely glandular-hairy.
Pedicels	3–5 mm, sparsely hairy or glabrous.	3–8 mm, finely glandular-hairy.
Flowers	corolla white, conic to urceolate; ovary glabrous.	corolla white, conic to urceolate; ovary glandular-hairy.
Fruits	depressed-globose, 5–8 mm diam., glabrous.	depressed-globose, 6–8 mm diam., finely glandular-hairy, (viscid).
Stones	distinct.	distinct.
2n	= 26.	= 26.

	Arctostaphylos purissima	Arctostaphylos virgata
Phenology	Flowering winter–early spring.	Flowering early winter–early spring.
Habitat	Maritime chaparral on deep, sandy soils	Maritime chaparral, open, closed-cone conifer forests
Elevation	0-100 m (0-300 ft)	0-500 m (0-1600 ft)
Distribution	CA [WildflowerSearch map] [BONAP county map]	CA [WildflowerSearch map] [BONAP county map]
Discussion	Of conservation concern. Arctostaphylos purissima is known from hills and mesas near the coast (Burton Mesa) in Santa Barbara County. (Discussion copyrighted by Flora of North America; reprinted with permission.)	Of conservation concern. Arctostaphylos virgata is associated mostly with Pinus muricata on the Point Reyes peninsula; populations are found at nearby sites from Bolinas Ridge, Muir Woods, and San Geronimo Ridge, Marin County. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 8, p. 434.	FNA vol. 8, p. 426.
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. 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. 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. regismontana, A. rudis, A. sensitiva, A. silvicola, A. stanfordiana, A. tomentosa, A. uva-ursi, A. viridissima, A. viscida
Name authority	P. V. Wells: Madroño 19: 195. 1968 ,	Eastwood: in C. S. Sargent, Trees & Shrubs 1: 203, plate 96. 1905 ,
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 virgata

La Purisima manzanita, La Purissima manzanita

Bolinas manzanita, Marin manzanita

Habit

Shrubs, erect, 1–4 m; burl absent; twigs densely short-hairy with longer hairs.

Shrubs, erect, 1–5 m; burl absent; twigs densely glandular-hairy.

Leaves

petiole to 2 mm;

blade bright green, shiny, orbiculate-ovate to ± orbiculate, 1–2.5 × 1–2 cm, base auriculate-clasping, margins entire, plane, surfaces smooth, glabrous.

petiole 2–4 mm;

blade bright green, ± shiny, narrowly oblong-ovate to oblong-lanceolate, 3–5 × 1–2.5 cm, base truncate to slightly lobed, margins entire, plane, surfaces papillate, sparsely glandular-hairy.

Inflorescences

racemes, simple or 1–2-branched;

immature inflorescence pendent, (branches dense, concealed by bracts), axis 0.5–1 cm, 1+ mm diam., densely short-hairy with longer hairs;

bracts not appressed, (overlapping), leaflike, ovate to lanceolate-ovate, 5–8 mm, apex acute, surfaces glabrous.

racemes, simple or 1-branched;

immature inflorescence pendent, (concealed by bracts), axis 1.5–2 cm, 1+ mm diam., densely glandular-hairy;

bracts not appressed, (green), leaflike, linear-lanceolate, 8–20 mm, apex acuminate, surfaces densely glandular-hairy.

Pedicels

3–5 mm, sparsely hairy or glabrous.

3–8 mm, finely glandular-hairy.

Flowers

corolla white, conic to urceolate;

ovary glabrous.

corolla white, conic to urceolate;

ovary glandular-hairy.

Fruits

depressed-globose, 5–8 mm diam., glabrous.

depressed-globose, 6–8 mm diam., finely glandular-hairy, (viscid).

Stones

distinct.

= 26.

Arctostaphylos virgata

Phenology

Flowering winter–early spring.

Flowering early winter–early spring.

Habitat

Maritime chaparral on deep, sandy soils

Maritime chaparral, open, closed-cone conifer forests

Elevation

0-100 m (0-300 ft)

0-500 m (0-1600 ft)

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Of conservation concern.

Arctostaphylos purissima is known from hills and mesas near the coast (Burton Mesa) in Santa Barbara County.

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

Of conservation concern.

Arctostaphylos virgata is associated mostly with Pinus muricata on the Point Reyes peninsula; populations are found at nearby sites from Bolinas Ridge, Muir Woods, and San Geronimo Ridge, Marin County.

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

Source

FNA vol. 8, p. 434.

FNA vol. 8, p. 426.

Parent taxa

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. 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. 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. regismontana, A. rudis, A. sensitiva, A. silvicola, A. stanfordiana, A. tomentosa, A. uva-ursi, A. viridissima, A. viscida

Name authority

P. V. Wells: Madroño 19: 195. 1968 ,

Eastwood: in C. S. Sargent, Trees & Shrubs 1: 203, plate 96. 1905 ,

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

The species comparison tool is brought to you by:

Flora of North America species comparison

Arctostaphylos purissima

Arctostaphylos virgata

Arctostaphylos purissima

Arctostaphylos virgata