Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Arctostaphylos rudis

Arctostaphylos stanfordiana

sand mesa manzanita, shagbark manzanita

Stanford's manzanita
Habit Shrubs, erect, 1–3 m; burl present or absent; bark on older stems persistent, gray, shredded; twigs sparsely short-hairy. Shrubs, erect or prostrate to decumbent, mat- or mound-forming, 0.1–3 m; burl absent; twigs usually glabrous, sometimes sparsely short-hairy, hairs sometimes glandular.
Leaves

erect;

petiole 3–8 mm;

blade bright green, shiny, elliptic, 1–3 × 1–2 cm, base cuneate to rounded, margins entire, plane, surfaces smooth, puberulent, glabrescent.

petiole 4–12 mm;

blade bright green, shiny or slightly glaucous, elliptic, oblong, or oblanceolate, 3–5 × 1.5–2.5 cm, base cuneate, (not clasping), margins entire, plane, surfaces smooth, glabrous or, rarely, finely glandular-puberulent.
Inflorescences

racemes, (simple or 1-branched);

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

bracts not appressed, scalelike, deltate, 2–6 mm, apex acuminate, surfaces glabrous.

panicles, 3–5-branched;

immature inflorescence ascendent, branches wide-spreading, often ascending to erect, axis 2–2.5 cm, to 1 mm diam., usually glabrous, sparsely hairy, or sometimes sparsely glandular-hairy;

bracts tightly appressed, scalelike, ovate to deltate, 1–1.5 mm (± equaling buds), apex acuminate, surfaces usually sparsely hairy or sometimes sparsely glandular-hairy; (buds scattered along inflorescence axis, round, appearing as “beads”).
Pedicels

3–6 mm, glabrous.

5–10 mm, glabrous.
Flowers

corolla white, conic to urceolate;

ovary glabrous.

corolla white to pink, urceolate;

ovary glabrous.
Fruits

depressed-globose, 8–14 mm diam., glabrous.

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

distinct.

distinct.
2n

= 26.

Arctostaphylos rudis

Arctostaphylos stanfordiana
Phenology Flowering winter–early spring.
Habitat Maritime chaparral on sandy soils
Elevation 0-100 m (0-300 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos rudis is found along the coast in Nipomo and Burton mesas and Point Sal, Santa Barbara and San Luis Obispo counties.

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

Subspecies 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Twigs, inflorescence axes, and bracts short glandular-hairy.
subsp. raichei
1. Twigs, inflorescence axes, and bracts glabrous or sparsely short-hairy
→ 2
2. Plants erect, 1-3 m; interior n Coast Ranges
subsp. stanfordiana
2. Plants prostrate to decumbent, 0.1-1 m; Sonoma County.
subsp. decumbens
Source FNA vol. 8, p. 416. FNA vol. 8.
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. pumila, A. pungens, A. purissima, A. rainbowensis, A. refugioensis, A. regismontana, 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. 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. tomentosa, A. uva-ursi, A. virgata, A. viridissima, A. viscida
Subordinate taxa
A. stanfordiana subsp. decumbens, A. stanfordiana subsp. raichei, A. stanfordiana subsp. stanfordiana
Name authority Jepson & Weislander: Erythea 8: 100. 1938 , Parry: Bull. Calif. Acad. Sci. 2: 493. 1887 ,
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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America, OregonFlora

The species comparison tool is brought to you by:
Northwest Wildflowers