Flora of North America species comparison

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Arctostaphylos imbricata

Arctostaphylos regismontana

San Bruno Mountain manzanita

Kings Mountain manzanita
Habit Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs. Shrubs or trees, erect, 2–5 m; burl absent; twigs densely glandular-hairy.
Leaves

petiole to 2 mm;

blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy.

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 densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs;

bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy.

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

3–5 mm, densely glandular-hairy.

6–10 mm, finely glandular-hairy.
Flowers

corolla white, urceolate;

ovary densely glandular-hairy.

corolla white, conic to urceolate;

ovary finely glandular-hairy.
Fruits

depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid).

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

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos imbricata

Arctostaphylos regismontana
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Maritime chaparral on sandstone outcroppings Chaparral, margins of open forests
Elevation 100-200 m (300-700 ft) 100-600 m (300-2000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(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. 435. FNA vol. 8, p. 433.
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. 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
Synonyms A. andersonii var. imbricata
Name authority Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 , 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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