Flora of North America species comparison

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Arctostaphylos pilosula

Arctostaphylos edmundsii

La Panza manzanita, Santa Margarita manzanita

little sur manzanita
Habit Shrubs, erect, 1–5 m; burl absent; twigs short-hairy and hispid. Shrubs, prostrate or mound-forming, 0.2–1.5 m; burl absent; twigs sparsely short-hairy.
Leaves

petiole 4–8 mm;

blade dark green to gray-glaucous, dull, narrowly elliptic to orbiculate-ovate, 1–3 × 1–2 cm, base cuneate or truncate to slightly lobed, margins entire, plane, surfaces smooth, glabrous.

bifacial in stomatal distribution;

petiole 2–3 mm;

blade dark green, lustrous, orbiculate to orbiculate-ovate, 1–2.5 × 1–1.5 cm, base truncate to ± lobed, margins entire, plane, surfaces smooth, sparsely puberulent.
Inflorescences

racemes, simple or 1-branched;

immature inflorescence pendent, axis 1–2 cm, 1+ mm diam., short-hairy with long hairs;

bracts not appressed, (green), leaflike, lanceolate, 8–15 mm, apex acute, surfaces long-hairy.

panicles, 2–5-branched;

immature inflorescence pendent, (branches crowded), axis 0.5–1 cm, 1+ mm diam., sparsely short-hairy;

bracts not appressed, scalelike, deltate to awl-like, 3–5 mm, apex acute, surfaces sparsely hairy or glabrous.
Pedicels

2–5 mm, glabrous.

3–4 mm, sparsely hairy or glabrous.
Flowers

corolla white to pink, urceolate;

ovary glabrous.

corolla white, urceolate;

ovary sparsely hairy or glabrous.
Fruits

depressed-globose, 8–10 mm diam., glabrous.

subglobose, 6–8 mm diam., glabrous.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos pilosula

Arctostaphylos edmundsii
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Chaparral, open forests Steep, rocky slopes and bluffs near ocean
Elevation 0-1200 m (0-3900 ft) 0-500 m (0-1600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos pilosula occurs in San Luis Obispo County and exhibits some variation in leaf shape and color, as well as indument. Plants at higher elevations and farther inland may reflect introgression with A. glauca. Some lower-elevation populations historically have been segregated as subsp. pismoensis or A. wellsii. Field observation suggests that there is a morphological cline between coastal and interior populations so that taxonomic distinctions between these populations are unwarranted. Further taxonomic analysis might help to resolve this situation.

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

Of conservation concern.

Arctostaphylos edmundsii is narrowly distributed along the Pacific Coast in the Little Sur region in the northern Santa Lucia Range, Monterey County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 426. FNA vol. 8, p. 424.
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. 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. 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
Synonyms A. pilosula subsp. pismoensis, A. wellsii A. edmundsii var. parvifolia, A. uva-ursi subsp. edmundsii, A. uva-ursi var. parvifolia
Name authority Jepson & Wieslander: Erythea 8: 101. 1938 , J. T. Howell: Leafl. W. Bot. 6: 202. 1952 ,
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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