(A. Gray) Niedenzu

Bot. Jahrb. Syst. 11: 144. 1889 ,.

Common names: Alpine bearberry
Etymology: Greek arktous, northern, alluding to distribution
Treatment appears in FNA Volume 8. Treatment on page 404. Mentioned on page 371, 375, 397, 405, 407.
FNA8 P48 Arctous alpina.jpegArctous
Arctous alpina
Arctostaphylos uva-ursi
Arctostaphylos patula
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Shrubs, not burled; bark brownish, exfoliating in papery sheets from older stems. Stems prostrate, extensively branched, glabrous. Leaves deciduous (leaf or leaf-bases marcescent), bifacial; blade ovate or obovate to oblanceolate, subcoriaceous, margins crenate-serrate, ± plane, surfaces glabrous (margins ciliate toward base). Inflorescences racemes (formed on current-year’s growth), 2–7-flowered; bracteoles absent. Flowers bisexual; sepals persistent, 5, distinct, broadly ovate; petals 5, connate nearly their entire lengths, white, cream, yellow, or green, corolla urceolate; stamens 10, included; filaments dilated, (usually hairy at base); anthers (reddish), with 2 (recurved), dorsal awns, dehiscent by 2 terminal pores; ovary 4–10-locular; stigma capitate. Drupes black-purple, brick-red, or scarlet, globose, juicy, smooth; pyrenes 4–5, distinct. Seeds 4–5, distinct, (ovoid), not angled; (testa bony). x = 13.


North America, Europe, Asia


Arctostaphylos Adanson subg. Arctous A. Gray in A. Gray et al., Syn. Fl. N. Amer. 2: 27. 1878

Species 3 or 4 (2 in the flora).

The genus Arctous differs vegetatively from Arctostaphylos in having leaves with winged petioles and crenate to serrulate margins, fruits that are bright red or black and juicy (in Arctostaphylos the fruits are mealy or granular), and only five nutlets with hard, smooth endocarps (in contrast to Arctostaphylos, where the fruits have ten sculptured nutlets). Arctous has flowering buds that develop in the spring, as opposed to Arctostaphylos, in which buds form in the summer and autumn and lie dormant during the winter. Phylogenetic studies employing molecular methods place Arctous as the sister group to Arctostaphylos. Both species of Arctous in the flora area turn bright orange-red in autumn and are suitable for the alpine or rock garden.

Selected References



1 Leaf blades 4-15 mm, surfaces rugose, hairy toward base and on petiole (hairs 1-2 mm); twigs clothed with persistent old leaves or petioles; corolla lobes 0.5 mm; fruits black- purple; stones 2.7-4.6 × 2-3.6 mm. Arctous alpina
1 Leaf blades (10-)15-30(-60) mm, surfaces not or only slightly rugose, glabrous; twigs bare of old leaves; corolla lobes 1 mm; fruits brick red or scarlet; stones 2.5-3 × 1.6-2.2 mm. Arctous rubra

"entire" is not a number.

... more about "Arctous"
Gordon C. Tucker +
(A. Gray) Niedenzu +
not furrowed +
exfoliating +
obovate;oblanceolate +
subcoriaceous +
Alpine bearberry +
rotate to crateriform campanulate cylindric globose or urceolate +
urceolate +
North America +, Europe +  and Asia +
scarlet +, brick-red +  and black-purple +
globose +
undifferentiated +
fusiform +
stonelike +
Greek arktous, northern, alluding to distribution +
indehiscent +
multicellular +
opposite +, whorled +  and alternate +
deciduous +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
green;yellow;green;yellow;cream;white +
reduced +
not sticky +
4-5-carpellate +
Bot. Jahrb. Syst. +
tan;yellowish-brown or brown +
distinct +
not angled +
persistent +
distinct +
prostrate +  and erect +
peltate +  and capitate +
straight +
Undefined tribe Arbuteae +
Arctous +
Ericaceae subfam. Arbutoideae +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +