FNA: Arctostaphylos purissima vs. Arctostaphylos confertiflora

	Arctostaphylos purissima	Arctostaphylos confertiflora
	La Purisima manzanita, La Purissima manzanita	Santa Rosa Island manzanita
Habit	Shrubs, erect, 1–4 m; burl absent; twigs densely short-hairy with longer hairs.	Shrubs, erect, prostrate, or mound-forming, 0.1–2 m; burl absent; twigs densely short-hairy with long, white, glandular hairs.
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.	(overlapping); petiole 4–10 mm; blade light green, dull, ovate to elliptic, 4–6 × 2–3 cm, base cuneate to ± rounded, margins entire, cupped, surfaces ± papillate, finely scabrous, glandular-puberulent, ± glandular-hairy proximally.
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.	panicles, 3–5-branched; immature inflorescence pendent, branches spreading, axis 1.5–2 cm, 1+ mm diam., densely short-hairy with long, white, glandular hairs; bracts not appressed, (crowded), (± densely overlapping near tips), (green), leaflike, ovate to oblanceolate, 8–18 mm, apex acute, surfaces finely glandular-hairy.
Pedicels	3–5 mm, sparsely hairy or glabrous.	3–5 mm, finely glandular-hairy.
Flowers	corolla white, conic to urceolate; ovary glabrous.	corolla white, conic to urceolate; ovary densely white-hairy, sparsely glandular.
Fruits	depressed-globose, 5–8 mm diam., glabrous.	depressed-globose, 8–11 mm diam., sparsely hairy.
Stones	distinct.	distinct.
2n	= 26.	= 26.

	Arctostaphylos purissima	Arctostaphylos confertiflora
Phenology	Flowering winter–early spring.	Flowering winter–early spring.
Habitat	Maritime chaparral on deep, sandy soils	Island 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 [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 confertiflora is found on Santa Rosa Island. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 8, p. 434.	FNA vol. 8, p. 428.
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. 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
Synonyms		A. subcordata var. confertiflora
Name authority	P. V. Wells: Madroño 19: 195. 1968 ,	Eastwood: Leafl. W. Bot. 1: 122. 1934 ,
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 purissima

Arctostaphylos confertiflora

La Purisima manzanita, La Purissima manzanita

Santa Rosa Island manzanita

Habit

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

Shrubs, erect, prostrate, or mound-forming, 0.1–2 m; burl absent; twigs densely short-hairy with long, white, glandular hairs.

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.

(overlapping);

petiole 4–10 mm;

blade light green, dull, ovate to elliptic, 4–6 × 2–3 cm, base cuneate to ± rounded, margins entire, cupped, surfaces ± papillate, finely scabrous, glandular-puberulent, ± glandular-hairy proximally.

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.

panicles, 3–5-branched;

immature inflorescence pendent, branches spreading, axis 1.5–2 cm, 1+ mm diam., densely short-hairy with long, white, glandular hairs;

bracts not appressed, (crowded), (± densely overlapping near tips), (green), leaflike, ovate to oblanceolate, 8–18 mm, apex acute, surfaces finely glandular-hairy.

Pedicels

3–5 mm, sparsely hairy or glabrous.

3–5 mm, finely glandular-hairy.

Flowers

corolla white, conic to urceolate;

ovary glabrous.

corolla white, conic to urceolate;

ovary densely white-hairy, sparsely glandular.

Fruits

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

depressed-globose, 8–11 mm diam., sparsely hairy.

Stones

distinct.

= 26.

Arctostaphylos purissima

Arctostaphylos confertiflora

Phenology

Flowering winter–early spring.

Habitat

Maritime chaparral on deep, sandy soils

Island 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]

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 confertiflora is found on Santa Rosa Island.

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

Source

FNA vol. 8, p. 434.

FNA vol. 8, p. 428.

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. 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

Synonyms

A. subcordata var. confertiflora

Name authority

P. V. Wells: Madroño 19: 195. 1968 ,

Eastwood: Leafl. W. Bot. 1: 122. 1934 ,

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 purissima

Arctostaphylos confertiflora

Arctostaphylos purissima

Arctostaphylos confertiflora