Flora of North America species comparison

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Arctostaphylos morroensis

Arctostaphylos pumila

Morro manzanita

sand-mat 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, prostrate or mound-forming, 0.1–1 m; burl absent; twigs short gray-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.

bifacial in stomatal distribution;

petiole 2–3 mm;

blade dull gray abaxially, dark green, ± shiny adaxially, narrowly obovate to oblanceolate, (convex), 1–2 × 0.5–1.5 cm, base cuneate, margins (tinged with red), entire, ± cupped, abaxial surface smooth, densely gray-tomentose, adaxial surface smooth, sparsely puberulent.
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 pendent, axis 0.3–0.5 cm, 1+ mm diam., short gray-hairy;

bracts not appressed, scalelike (proximalmost leaflike), lanceolate or oblanceolate, 2–3 mm, apex acute to mucronate, surfaces hairy or glabrous.
Pedicels

4–6 mm, hairy or glabrous.

3–4 mm, hairy.
Flowers

corolla white, urceolate;

ovary densely white-hairy.

corolla white, urceolate;

ovary white-hairy or ± glabrous.
Fruits

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

globose, 5–6 mm diam., sparsely hairy or glabrous.
Stones

distinct.

distinct.
2n

= 26.

= 26.

Arctostaphylos morroensis

Arctostaphylos pumila
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Maritime chaparral on sandy soils near coast Sand dunes, maritime chaparral, open, closed-cone conifer forests
Elevation 0-100 m (0-300 ft) 0-300 m (0-1000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[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 pumila is known from the southern Monterey Bay region, Monterey County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 432. 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. 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. pringlei, 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 , Nuttall: Trans. Amer. Philos. Soc., n. s. 8: 266. 1842 ,
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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