FNA: Arctostaphylos imbricata vs. Arctostaphylos klamathensis

	Arctostaphylos imbricata	Arctostaphylos klamathensis
	San Bruno Mountain manzanita	Klamath manzanita
Habit	Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs.	Shrubs, prostrate or mat-forming, 0.1–0.5 m; burl absent; twigs sparsely glandular-hairy.
Leaves	petiole to 2 mm; blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy.	petiole 4–7 mm, (glandular-hairy); blade glaucous, dull, obovate to oblanceolate or widely elliptic, 1–3.5 × 0.5–2.5 cm, base cuneate or obtuse, margins entire, plane, surfaces papillate, ± scabrous, midvein sparsely, finely glandular-hairy.
Inflorescences	panicles, 3–5-branched; immature inflorescence pendent, (branches densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs; bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy.	racemes, simple or 1-branched; immature inflorescence pendent, (globose), axis 0.5–1 cm, 1+ mm diam., sparsely glandular-hairy; bracts not appressed, scalelike, awl-like, 2–5 mm, apex acute, surfaces glandular-hairy.
Pedicels	3–5 mm, densely glandular-hairy.	3–6 mm, finely glandular-hairy.
Flowers	corolla white, urceolate; ovary densely glandular-hairy.	corolla white, urceolate; ovary glandular-hairy.
Fruits	depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid).	globose, 6–7 mm diam., glabrous.
Stones	distinct.	connate into single sphere.
2n	= 26.	= 26.

	Arctostaphylos imbricata	Arctostaphylos klamathensis
Phenology	Flowering winter–early spring.	Flowering late spring.
Habitat	Maritime chaparral on sandstone outcroppings	Open, subalpine forests on soils derived from gabbro
Elevation	100-200 m (300-700 ft)	1600-2000 m (5200-6600 ft)
Distribution	CA [WildflowerSearch map] [BONAP county map]	CA [BONAP county map]
Discussion	Of conservation concern. Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (Discussion copyrighted by Flora of North America; reprinted with permission.)	Of conservation concern. Arctostaphylos klamathensis is known from the eastern Klamath Mountains, Siskiyou and Trinity counties. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 8, p. 435.	FNA vol. 8, p. 436.
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. 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. 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
Synonyms	A. andersonii var. imbricata
Name authority	Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 ,	S. W. Edwards: Four Seasons 6(4): 20, figs. 1, 2. (1983)
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 klamathensis

San Bruno Mountain manzanita

Klamath manzanita

Habit

Shrubs, prostrate or mat- or mound-forming, 0.1–1 m; burl absent; twigs densely fine-hairy with long, gland-tipped hairs.

Shrubs, prostrate or mat-forming, 0.1–0.5 m; burl absent; twigs sparsely glandular-hairy.

Leaves

petiole to 2 mm;

blade light green, dull, orbiculate to orbiculate-ovate, 2.5–4 × 2–3 cm, base auriculate-clasping, margins entire, plane, surfaces papillate, ± scabrous, sparsely glandular-hairy.

petiole 4–7 mm, (glandular-hairy);

blade glaucous, dull, obovate to oblanceolate or widely elliptic, 1–3.5 × 0.5–2.5 cm, base cuneate or obtuse, margins entire, plane, surfaces papillate, ± scabrous, midvein sparsely, finely glandular-hairy.

Inflorescences

panicles, 3–5-branched;

immature inflorescence pendent, (branches densely clustered, ± sessile), axis 0.5–1 cm, 1+ mm diam., densely fine-hairy with long, gland-tipped hairs;

bracts appressed, leaflike, ovate, 5–10 mm, apex acute, surfaces glandular-hairy.

racemes, simple or 1-branched;

immature inflorescence pendent, (globose), axis 0.5–1 cm, 1+ mm diam., sparsely glandular-hairy;

bracts not appressed, scalelike, awl-like, 2–5 mm, apex acute, surfaces glandular-hairy.

Pedicels

3–5 mm, densely glandular-hairy.

3–6 mm, finely glandular-hairy.

Flowers

corolla white, urceolate;

ovary densely glandular-hairy.

corolla white, urceolate;

ovary glandular-hairy.

Fruits

depressed-globose, 6–7 mm diam., glandular-hairy, (± viscid).

globose, 6–7 mm diam., glabrous.

Stones

distinct.

connate into single sphere.

= 26.

Arctostaphylos imbricata

Arctostaphylos klamathensis

Phenology

Flowering winter–early spring.

Flowering late spring.

Habitat

Maritime chaparral on sandstone outcroppings

Open, subalpine forests on soils derived from gabbro

Elevation

100-200 m (300-700 ft)

1600-2000 m (5200-6600 ft)

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Of conservation concern.

Arctostaphylos imbricata occurs on San Bruno Mountain in San Mateo County. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

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

Of conservation concern.

Arctostaphylos klamathensis is known from the eastern Klamath Mountains, Siskiyou and Trinity counties.

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

Source

FNA vol. 8, p. 435.

FNA vol. 8, p. 436.

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. 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. 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

Synonyms

A. andersonii var. imbricata

Name authority

Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 149. 1931 ,

S. W. Edwards: Four Seasons 6(4): 20, figs. 1, 2. (1983)

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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Arctostaphylos imbricata

Arctostaphylos klamathensis

Arctostaphylos imbricata

Arctostaphylos klamathensis