FNA: Arctostaphylos morroensis vs. Arctostaphylos ohloneana

	Arctostaphylos morroensis	Arctostaphylos ohloneana
	Morro manzanita	Ohlone 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, 1–2 m; burl absent; twigs sparsely short-hairy, usually with scattered long-glandular hairs.
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 3–5 mm; blade light green, not glaucous, dull, elliptic to ovate-elliptic, 1.5–3 × 1–1.5 cm, base cuneate, (not clasping), margins entire, plane, surfaces smooth, puberulent with small, interspersed, glandular hairs, glabrescent.
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.	panicles, 3–5-branched, immature inflorescence pendent, branches spreading, axis 1.5–2.5 cm, 1+ mm diam., sparsely short-hairy, usually with scattered, long-glandular hairs; bracts not appressed, scalelike, ovate to deltate, 1–1.3 mm, apex acute, surfaces hairy.
Pedicels	4–6 mm, hairy or glabrous.	3–8 mm, glabrous.
Flowers	corolla white, urceolate; ovary densely white-hairy.	corolla white, conic to urceolate; ovary glabrous.
Fruits	depressed-globose, 7–10 mm diam., sparsely hairy.	depressed-globose, 5–8 mm diam., glabrous.
Stones	distinct.	distinct.
2n	= 26.	= 26.

	Arctostaphylos morroensis	Arctostaphylos ohloneana
Phenology	Flowering winter–early spring.	Flowering winter–early spring.
Habitat	Maritime chaparral on sandy soils near coast	Knobcone pine chaparral, siliceous shale ridges
Elevation	0-100 m (0-300 ft)	300-400 m. (1000-1300 ft.)
Distribution	CA [WildflowerSearch map] [BONAP county map]	CA [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.)	Of conservation concern. Arctostaphylos ohloneana is known from northern Ben Lomond Mountain in northern Santa Cruz County. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 8, p. 432.	FNA vol. 8, p. 417.
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. 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
Name authority	Wieslander & B. Schreiber: Madroño 5: 42, fig. 2a. 1939 ,	M. C. Vasey & V. T. Parker: Madroño 55: 240, fig. 3. (2009)
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Arctostaphylos ohloneana

Morro manzanita

Ohlone 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, 1–2 m; burl absent; twigs sparsely short-hairy, usually with scattered long-glandular hairs.

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 3–5 mm;

blade light green, not glaucous, dull, elliptic to ovate-elliptic, 1.5–3 × 1–1.5 cm, base cuneate, (not clasping), margins entire, plane, surfaces smooth, puberulent with small, interspersed, glandular hairs, glabrescent.

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.

panicles, 3–5-branched, immature inflorescence pendent, branches spreading, axis 1.5–2.5 cm, 1+ mm diam., sparsely short-hairy, usually with scattered, long-glandular hairs;

bracts not appressed, scalelike, ovate to deltate, 1–1.3 mm, apex acute, surfaces hairy.

Pedicels

4–6 mm, hairy or glabrous.

3–8 mm, glabrous.

Flowers

corolla white, urceolate;

ovary densely white-hairy.

corolla white, conic to urceolate;

ovary glabrous.

Fruits

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

depressed-globose, 5–8 mm diam., glabrous.

Stones

distinct.

= 26.

Arctostaphylos morroensis

Arctostaphylos ohloneana

Phenology

Flowering winter–early spring.

Habitat

Maritime chaparral on sandy soils near coast

Knobcone pine chaparral, siliceous shale ridges

Elevation

0-100 m (0-300 ft)

300-400 m. (1000-1300 ft.)

Distribution

[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.)

Of conservation concern.

Arctostaphylos ohloneana is known from northern Ben Lomond Mountain in northern Santa Cruz County.

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

Source

FNA vol. 8, p. 432.

FNA vol. 8, p. 417.

Parent taxa

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. 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

Name authority

Wieslander & B. Schreiber: Madroño 5: 42, fig. 2a. 1939 ,

M. C. Vasey & V. T. Parker: Madroño 55: 240, fig. 3. (2009)

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).

Choose a data source: Flora of North America

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Flora of North America species comparison

Arctostaphylos morroensis

Arctostaphylos ohloneana

Arctostaphylos morroensis

Arctostaphylos ohloneana