Flora of North America species comparison

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Arctostaphylos morroensis

Arctostaphylos pringlei

Morro manzanita

Pringle manzanita, yellowleaf manzanita
Habit Shrubs, erect or mound-forming, 1–4 m; burl absent; bark on older stems persistent, gray, shredded; twigs short-hairy with long, white hairs. Shrubs, erect, 1–5 m; burl absent; twigs densely short glandular-hairy.
Leaves

bifacial in stomatal distribution;

petiole 2–5 mm;

blade dull gray abaxially, dark green, ± shiny adaxially, oblong-ovate to oblong-elliptic, 1.5–3 × 1–2 cm, base subcordate to ± truncate (sometimes with vestigial auricles), margins entire, cupped, abaxial surface smooth, densely tomentose, adaxial surface smooth, glabrous.

petiole 5–10 mm;

blade gray-glaucous, dull, elliptic, ovate, or ± orbiculate, 2–5 × 1–4 cm, base rounded, truncate, or ± lobed, margins entire, plane, surfaces papillate, scabrous, finely glandular-hairy.
Inflorescences

panicles, 2–5-branched;

immature inflorescence pendent, (branches congested, bell-shaped, partly framed by bracts), axis 0.5–0.8 cm, 1+ mm diam., short-hairy with long, white hairs;

bracts not appressed, leaflike, linear-lanceolate, 5–8 mm, apex acuminate, surfaces puberulent.

racemes, simple or 1-branched;

immature inflorescence (developing late), pendent or erect, (concealed by bracts), axis 1–1.5 cm, 1+ mm diam., densely short glandular-hairy;

bracts deciduous after flowering, (crowded), appressed, (bright pink), leaflike, lanceolate, 6–10 mm, apex acute, surfaces densely glandular-hairy.
Pedicels

4–6 mm, hairy or glabrous.

5–15 mm, finely glandular-hairy.
Flowers

corolla white, urceolate;

ovary densely white-hairy.

corolla white to pink, conic to urceolate;

ovary glandular-hairy.
Fruits

depressed-globose, 7–10 mm diam., sparsely hairy.

globose, 6–12 mm diam., finely glandular-hairy, (viscid).
Stones

distinct.

distinct or connate.
2n

= 26.

Arctostaphylos morroensis

Arctostaphylos pringlei
Phenology Flowering winter–early spring.
Habitat Maritime chaparral on sandy soils near coast
Elevation 0-100 m (0-300 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; NV; UT; nw Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Arctostaphylos morroensis is known from the Morro Bay region in San Luis Obispo County.

(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. Stones distinct.
subsp. pringlei
1. Stones connate into single sphere.
subsp. drupacea
Source FNA vol. 8, p. 432. FNA vol. 8, p. 427.
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. 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. 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. 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. pringlei subsp. drupacea, A. pringlei subsp. pringlei
Name authority Wieslander & B. Schreiber: Madroño 5: 42, fig. 2a. 1939 , Parry: Bull. Calif. Acad. Sci. 2: 494. 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).



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