Flora of North America species comparison

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Arctostaphylos auriculata

Arctostaphylos klamathensis

Mount Diablo manzanita, Mt. Diablo manzanita

Klamath manzanita
Habit Shrubs, erect, 1–4.5 m; burl absent; twigs densely white-hairy with long, white hairs. Shrubs, prostrate or mat-forming, 0.1–0.5 m; burl absent; twigs sparsely glandular-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.

petiole 4–7 mm, (glandular-hairy);

blade glaucous, dull, obovate to oblanceolate or widely elliptic, 1–3.5 × 0.5–2.5 cm, base cuneate or obtuse, margins entire, plane, surfaces papillate, ± scabrous, midvein sparsely, finely glandular-hairy.
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, (globose), axis 0.5–1 cm, 1+ mm diam., sparsely glandular-hairy;

bracts not appressed, scalelike, awl-like, 2–5 mm, apex acute, surfaces glandular-hairy.
Pedicels

4–10 mm, tomentose.

3–6 mm, finely glandular-hairy.
Flowers

corolla white to pink, conic;

ovary densely white-hairy.

corolla white, urceolate;

ovary glandular-hairy.
Fruits

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

globose, 6–7 mm diam., glabrous.
Stones

distinct.

connate into single sphere.
2n

= 26.

= 26.

Arctostaphylos auriculata

Arctostaphylos klamathensis
Phenology Flowering winter–early spring. Flowering late spring.
Habitat Chaparral, open, closed-cone conifer forests Open, subalpine forests on soils derived from gabbro
Elevation 300-500 m (1000-1600 ft) 1600-2000 m (5200-6600 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[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 klamathensis is known from the eastern Klamath Mountains, Siskiyou and Trinity counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 430. FNA vol. 8, p. 436.
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. 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
Name authority Eastwood: Bull. Torrey Bot. Club 32: 202. 1905 , S. W. Edwards: Four Seasons 6(4): 20, figs. 1, 2. (1983)
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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