Flora of North America species comparison

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Arctostaphylos sensitiva

Arctostaphylos morroensis

coinleaf manzanita, dwarf manzanita, glossyleaf manzanita

Morro manzanita
Habit Shrubs, erect or mound-forming, 1–2 m; burl absent; bark on older stems red, smooth; twigs densely short-haired with longer gland-tipped hairs. 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

bifacial in stomatal distribution;

petiole 1–3 mm;

blade light green abaxially, dark green adaxially, shiny, orbiculate to orbiculate-ovate, 1–2.2 × 0.8–1.8 cm, base truncate to ± lobed, margins entire, cupped, surfaces smooth, glabrous, midvein hairy.

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 0.5–1 cm, to 1 mm diam., densely short-hairy with longer gland-tipped hairs;

bracts appressed, scalelike, deltate, 0.5–2 mm, apex acute, surfaces glabrous.

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

3–5 mm, glabrous.

4–6 mm, hairy or glabrous.
Flowers

4-merous;

corolla white to pink, urceolate;

ovary white-hairy.

corolla white, urceolate;

ovary densely white-hairy.
Fruits

subcylindric, 3–4 mm diam., glabrous.

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

distinct (breaking apart in mature fruit).

distinct.
2n

= 26.

= 26.

Arctostaphylos sensitiva

Arctostaphylos morroensis
Phenology Flowering winter–early spring. Flowering winter–early spring.
Habitat Sandstone uplands in maritime chaparral or closed-cone conifer forests near coast Maritime chaparral on sandy soils near coast
Elevation 100-600 m (300-2000 ft) 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 sensitiva occurs in Marin, San Mateo, and Santa Cruz counties.

(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. 418. 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. 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. 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. nummularia subsp. sensitiva, A. nummularia var. sensitiva
Name authority Jepson: Madroño 1: 85. 1922 , 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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