Flora of North America species comparison

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Arctostaphylos glauca

Arctostaphylos morroensis

big berry manzanita

Morro manzanita
Habit Shrubs or trees, erect, mound-forming, 1–8 m; burl absent; twigs usually glabrous, sometimes short-hairy or glandular-hairy. Shrubs, erect or mound-forming, 1–4 m; burl absent; bark on older stems persistent, gray, shredded; twigs short-hairy with long, white hairs.
Leaves

petiole 7–15 mm;

blade white-glaucous, dull, oblong-ovate to ± orbiculate, 2.5–5 × 2–4 cm, base rounded, truncate, or slightly lobed, margins entire, plane, surfaces smooth, glabrous.

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.
Inflorescences

panicles, 4–8-branched;

immature inflorescence pendent, branches spreading, axis 2–3 cm, 1+ mm diam., usually glabrous, sometimes short-hairy or glandular-hairy;

bracts not appressed, (spreading), scalelike, deltate, 3–6 mm, (fleshy), apex mucronate, surfaces glabrous; (buds exposed).

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.
Pedicels

8–10 mm, finely glandular-hairy.

4–6 mm, hairy or glabrous.
Flowers

corolla white, conic to urceolate;

ovary densely glandular-viscid.

corolla white, urceolate;

ovary densely white-hairy.
Fruits

globose, 12–15 mm diam., glabrous, (viscid).

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

connate into single sphere.

distinct.
2n

= 26.

= 26.

Arctostaphylos glauca

Arctostaphylos morroensis
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Rocky slopes, chaparral, woodlands Maritime chaparral on sandy soils near coast
Elevation 300-2200 m (1000-7200 ft) 0-100 m (0-300 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Arctostaphylos glauca is widespread, occurring from Mount Diablo in central California through the southern Coast Ranges, east through the Transverse Ranges into the desert, and south in the Peninsular Ranges into northern Baja California, usually in drier interior ranges. It is distinctive throughout its range; however, some populations have nonglandular twig puberulence and others are stipitate-glandular, often mixed in with individuals that are typically glabrous. Arctostaphylos glauca can be a component of chaparral and can also be found in woodlands and at the edges of grasslands.

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

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.)
Source FNA vol. 8, p. 422. FNA vol. 8, p. 432.
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. 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
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
Synonyms A. glauca var. puberula
Name authority Lindley: Edwards’s Bot. Reg. 21: sub plate 1791. 1835 , Wieslander & B. Schreiber: Madroño 5: 42, fig. 2a. 1939 ,
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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