Flora of North America species comparison

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Arctostaphylos andersonii

Arctostaphylos confertiflora

Anderson's manzanita, Santa Cruz manzanita

Santa Rosa Island manzanita
Habit Shrubs or trees, erect, (arborescent), 2–5 m; burl absent; twigs densely short-hairy with long, white, gland-tipped hairs. Shrubs, erect, prostrate, or mound-forming, 0.1–2 m; burl absent; twigs densely short-hairy with long, white, glandular hairs.
Leaves

bifacial in stomatal distribution;

petiole to 4 mm;

blade bright green, dull, oblong, 4–7 × 1.5–2.5 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

panicles, 4–6-branched;

immature inflorescence pendent, branches spreading, axis 2–3 cm, 1+ mm diam., densely short-hairy with long, white, gland-tipped hairs;

bracts not appressed, leaflike, lanceolate, 8–15 mm, apex acute, surfaces short-hairy with long, gland-tipped hairs.

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

6–8 mm, finely glandular-hairy.

3–5 mm, finely glandular-hairy.
Flowers

corolla white, conic;

ovary finely glandular-hairy.

corolla white, conic to urceolate;

ovary densely white-hairy, sparsely glandular.
Fruits

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

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

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos andersonii

Arctostaphylos confertiflora
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Chaparral, edges of open forests Island chaparral, open, closed-cone conifer forests
Elevation 300-900 m (1000-3000 ft) 0-500 m (0-1600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos andersonii is known from the central and southern Santa Cruz Mountains in Santa Cruz and Santa Clara counties.

(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. 432. FNA vol. 8, p. 428.
Parent taxa Ericaceae > subfam. Arbutoideae > Arctostaphylos Ericaceae > subfam. Arbutoideae > Arctostaphylos
Sibling taxa
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. 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 A. Gray: Proc. Amer. Acad. Arts 11: 83. 1876 , 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).



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