Flora of North America species comparison

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Arctostaphylos nissenana

Arctostaphylos hispidula

nissenan manzanita

Gasquet manzanita, Howell's manzanita
Habit Shrubs, erect or mound-forming, 0.2–1.5 m; burl absent; bark on older stems persistent, gray, shredded; twigs short soft-hairy. Shrubs, erect or mound-forming, 1–3 m; burl absent; twigs finely glandular-hairy.
Leaves

petiole 1–3 mm;

blade gray-glaucous, dull, elliptic to oblong-elliptic, 1–2 × 0.8–1.5 cm, base cuneate to rounded, margins entire, plane, surfaces smooth, sparsely appressed-puberulent, glabrescent.

petiole 3–6 mm;

blade dark green, dull, elliptic to oblanceolate, 1–3 × 0.5–1.5 cm, base cuneate, margins entire, plane, surfaces scabrous, papillate, finely glandular-hairy.
Inflorescences

racemes, simple or 1-branched;

immature inflorescence pendent, (framed by leafy bracts), axis 0.2–0.5 cm, 1+ mm diam., short soft-hairy;

bracts not appressed, narrowly leaflike, lanceolate, 3–5 mm, apex acute, surfaces glabrous or sparsely hairy.

panicles, 3–6-branched;

immature inflorescence pendent, branches spreading or ascending to erect, axis 1–2 cm, to 1 mm diam., finely glandular-hairy;

bracts tightly appressed, scalelike, awl-like, 2–4 mm (equaling buds), apex acuminate, surfaces finely glandular-hairy; (buds scattered along inflorescence axis, round, appearing as “beads”).
Pedicels

5–7 mm, sparsely hairy or glabrous.

3–5 mm, glabrous.
Flowers

corolla white, urceolate;

ovary white-hairy.

corolla white, urceolate;

ovary glabrous.
Fruits

subglobose, 3–4 mm diam., glabrous.

subglobose, 5–7 mm diam., glabrous.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos nissenana

Arctostaphylos hispidula
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Shallow shale soils in chaparral and foothill woodlands Serpentine chaparral and open forests on sandstone
Elevation 500-1200 m (1600-3900 ft) 100-1100 m (300-3600 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos nissenana occurs in the western Sierra Nevada in El Dorado, Placer, and Tuolumne counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Arctostaphylos hispidula is known from Josephine County, Oregon, and adjacent California in Del Norte and Humboldt counties; there is an isolated population in northern Sonoma County, California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 425. FNA vol. 8, p. 420.
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. 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. 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. stanfordiana subsp. hispidula
Name authority Merriam: Proc. Biol. Soc. Wash. 31: 102, plates 4, 5. 1918 , Howell: Fl. N.W. Amer., 415. 1901 ,
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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