Flora of North America species comparison

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Arctostaphylos auriculata

Arctostaphylos pumila

Mount Diablo manzanita, Mt. Diablo manzanita

sand-mat manzanita
Habit Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. Shrubs, prostrate or mound-forming, 0.1–1 m; burl absent; twigs short gray-hairy.
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.

bifacial in stomatal distribution;

petiole 2–3 mm;

blade dull gray abaxially, dark green, ± shiny adaxially, narrowly obovate to oblanceolate, (convex), 1–2 × 0.5–1.5 cm, base cuneate, margins (tinged with red), entire, ± cupped, abaxial surface smooth, densely gray-tomentose, adaxial surface smooth, sparsely puberulent.
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.

racemes, simple or 1-branched;

immature inflorescence pendent, axis 0.3–0.5 cm, 1+ mm diam., short gray-hairy;

bracts not appressed, scalelike (proximalmost leaflike), lanceolate or oblanceolate, 2–3 mm, apex acute to mucronate, surfaces hairy or glabrous.
Pedicels

4–10 mm, tomentose.

3–4 mm, hairy.
Flowers

corolla white to pink, conic;

ovary densely white-hairy.

corolla white, urceolate;

ovary white-hairy or ± glabrous.
Fruits

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

globose, 5–6 mm diam., sparsely hairy or glabrous.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos auriculata

Arctostaphylos pumila
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Chaparral, open, closed-cone conifer forests Sand dunes, maritime chaparral, open, closed-cone conifer forests
Elevation 300-500 m (1000-1600 ft) 0-300 m (0-1000 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[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 pumila is known from the southern Monterey Bay region, Monterey County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 430. FNA vol. 8, p. 424.
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. 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
Name authority Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , Nuttall: Trans. Amer. Philos. Soc., n. s. 8: 266. 1842 ,
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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