Flora of North America species comparison

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Arctostaphylos pumila

Arctostaphylos nortensis

sand-mat manzanita

Del Norte manzanita
Habit Shrubs, prostrate or mound-forming, 0.1–1 m; burl absent; twigs short gray-hairy. Shrubs or trees, erect, 2–5 m; burl absent; twigs soft-hairy with minute glands on cryptic, short hairs or at tips of longer, hispid hairs.
Leaves

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.

petiole 4–5 mm;

blade gray-glaucous, becoming dark green, dull, narrowly elliptic-ovate, 2–4 × 1–2 cm, base truncate to rounded, margins entire, plane, (sometimes sparsely ciliate), surfaces smooth, finely white-tomentose or glabrous.
Inflorescences

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.

racemes, simple or 1-branched;

immature inflorescence pendent, (branches crowded, bell-shaped, ± obscured by bracts), axis 0.5–1.2 cm, 1+ mm diam., soft-hairy with minute glands on cryptic, short hairs or at tips of longer, hispid hairs;

bracts not appressed, (green), leaflike, ovate, 5–10 mm, apex acute, surfaces hairy, (also with longer hairs).
Pedicels

3–4 mm, hairy.

2–4 mm, sparsely white-hairy.
Flowers

corolla white, urceolate;

ovary white-hairy or ± glabrous.

corolla white, conic to urceolate;

ovary densely white-hairy.
Fruits

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

depressed-globose, 6–8 mm diam., sparsely white-hairy.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos pumila

Arctostaphylos nortensis
Phenology Flowering winter–early spring. Flowering late winter–late spring.
Habitat Sand dunes, maritime chaparral, open, closed-cone conifer forests Chaparral, open forests
Elevation 0-300 m (0-1000 ft) 400-600 m (1300-2000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[BONAP county map]
Discussion

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.)

Of conservation concern.

Arctostaphylos nortensis occurs on upland peridodite soils in the interior mountains of Del Norte County, California, and adjacent Curry and Josephine counties, Oregon. It appears to be a distinct entity and well distributed in this limited region; it could be confused with hybrids between A. canescens and A. viscida that have been described from the interior portion of its range. In the protologue, Wells did not mention their glandular pubescence, clearly visible on the type specimen; this feature can be difficult to discern in some herbarium specimens. The region of northwestern California and adjacent southwestern Oregon needs more study, this taxon being one example.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 424. 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. 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. 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. columbiana subsp. nortensis
Name authority Nuttall: Trans. Amer. Philos. Soc., n. s. 8: 266. 1842 , (P. V. Wells) P. V. Wells: Four Seasons 9(2): 56. 1992 ,
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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