Flora of North America species comparison

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Arctostaphylos hookeri

Arctostaphylos montana

Hooker's manzanita, Raven's manzanita

Mt. Tamalpais manzanita
Habit Shrubs, prostrate or erect, mat- or mound-forming, 0.1–1.5 m; burl absent; bark on older stems persistent, reddish, smooth; twigs sparsely short-hairy. Shrubs, erect, prostrate, or mound-forming, 0.1–2 m; burl absent; twigs densely white short-hairy.
Leaves

petiole 1–8 mm;

blade bright green, shiny, narrow-elliptic (rhombic) or lanceolate-elliptic to widely elliptic, 0.8–3 × 0.4–1.5 cm, base rounded to cuneate, margins entire, plane, surfaces smooth, ± puberulent, glabrescent.

petiole 2–6 mm;

blade dark green, shiny, orbiculate-elliptic to elliptic, 1–2.5 × 1–1.5 cm, base rounded to cuneate, margins entire, plane, surfaces smooth, puberulent, glabrescent.
Inflorescences

racemes, simple or 1-branched;

immature inflorescence pendent (crook-necked), axis 0.3–1 cm, 1+ mm diam., sparsely short-hairy;

bracts not appressed, (weakly spreading), (congested), (dark green), scalelike, deltate, (globose, cuplike), 2–5 mm, apex acute, surfaces glabrous.

panicles, 1–3-branched;

immature inflorescence pendent, (branches compact), axis 0.5–1.5 cm, 1+ mm diam., densely white short-hairy;

bracts tightly appressed, scalelike, ovate, 2–5 mm, apex acuminate, surfaces glabrous.
Pedicels

2–6 mm, glabrous.

3–6 mm, glabrous.
Flowers

corolla white, urceolate;

ovary glabrous.

corolla white, conic to urceolate;

ovary glabrous.
Fruits

globose, 3–6 mm diam., glabrous.

globose, 4–8 mm diam., glabrous.
Stones

distinct.

distinct.
2n

= 26.

Arctostaphylos hookeri

Arctostaphylos montana
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from USDA
wc Calif
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

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

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Plants erect or mound-forming; leaf blades ± elliptic, 2-3 × 1-1.5 cm; petioles 4-8 mm; Monterey Bay area.
subsp. hookeri
1. Plants prostrate, mat-forming; leaf blades narrow-elliptic (diamond-shaped), 0.8-1.2 × 0.4-0.7 cm; petioles 1-3 mm; San Luis Obispo County.
subsp. hearstiorum
1. Fruits 6-8 mm diam.; plants mound-forming or erect; leaf blades orbiculate-elliptic to elliptic, 1-2.5 × 1-1.5 cm; young twigs white-tomentose.
subsp. montana
1. Fruits 4-5 mm diam.; plants prostrate; leaf blades orbiculate-elliptic, 1-2 × 1-1.5 cm; young twigs gray-tomentose.
subsp. ravenii
Source FNA vol. 8, p. 417. FNA vol. 8, p. 436.
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. 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. 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
Subordinate taxa
A. hookeri subsp. hearstiorum, A. hookeri subsp. hookeri
A. montana subsp. montana, A. montana subsp. ravenii
Synonyms A. hookeri subsp. montana, A. pungens var. montana
Name authority G. Don: Gen. Hist. 3: 836. 1834 , Eastwood: Proc. Calif. Acad. Sci., ser. 3, 1: 83. (1897)
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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