Flora of North America species comparison

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Vaccinium boreale

Vaccinium uliginosum

bleuet boréal, northern blueberry, sweet hurts

airelle des marécages, alpine blueberry, blueberry, bog bilberry, bog blueberry
Habit Plants forming small, dense colonies, 0.1–0.9 dm, (superficially rhizomatous); twigs green, (delicate), angled, (intricately branched), hairy in lines. Plants forming dense mats or open, extensive colonies; twigs of current season pale green, terete, glabrous or faintly puberulent, not verrucose.
Leaves

deciduous;

blade bright green, narrowly elliptic, 8–21 × 2–6 mm, membranous, margins sharply, uniformly serrate, surfaces usually glabrous, eglandular abaxially.

blades usually glaucous abaxially, green to glaucous adaxially, orbiculate, ovate, or obovate to narrowly elliptic, 8–14 × 3–7 mm, membranous, margins entire, surfaces often faintly puberulent, sometimes hairy throughout.
Flowers

calyx green, glaucous, glabrous (sometimes ciliate);

corolla white to greenish white, cylindric, 3–4 mm;

filaments ciliate.

sepals usually distinct;

corolla white to pink, 3–4(–5) mm, lobes 0.3–0.4 mm;

filaments glabrous.
Berries

blue, glaucous, 3–5 mm diam., glabrous.

blue, 6–8 mm diam., glaucous.
Seeds

10–30, ca. 1.1 mm.

2n

= 24.

= 24, 48, 72.

Vaccinium boreale

Vaccinium uliginosum
Phenology Flowering late spring–early summer. Flowering Jun–Jul.
Habitat Headlands, open, rocky uplands, alpine heaths and meadows, forest-tundra. 0-2000 m Wet or dry acidic sites in boreal taiga, tundras, and alpine thickets and krummholz
Elevation 0-2200 m (0-7200 ft)
Distribution
from FNA
ME; NH; NY; VT; NB; NL; NS; QC
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CA; ID; ME; MI; MN; MT; NH; NV; NY; OR; UT; VT; WA; WY; AB; BC; MB; NB; NF; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; n Eurasia
[WildflowerSearch map]
[BONAP county map]
Discussion

Vaccinium uliginosum is transcontinental in North America between 60° and 70° north latitude; farther north it is rare, especially in the Queen Elizabeth Islands. To the southwest, it is found as far as northern California and northwestern Utah. The summits of the White Mountains of New Hampshire form its southernmost limit in eastern North America. This wide-ranging plant shows considerable variation, notably in floral morphology. Subspecies have been recognized (cf. S. B. Young 1970); a review of morphological variation by H. J. Warr (1981) did not support the distinctiveness of infraspecific taxa.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 528. FNA vol. 8, p. 518.
Parent taxa Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Cyanococcus Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Vaccinium
Sibling taxa
V. angustifolium, V. arboreum, V. cespitosum, V. corymbosum, V. crassifolium, V. darrowii, V. deliciosum, V. erythrocarpum, V. hirsutum, V. macrocarpon, V. membranaceum, V. myrsinites, V. myrtilloides, V. myrtillus, V. ovalifolium, V. ovatum, V. oxycoccos, V. pallidum, V. parvifolium, V. scoparium, V. stamineum, V. tenellum, V. uliginosum, V. vitis-idaea
V. angustifolium, V. arboreum, V. boreale, V. cespitosum, V. corymbosum, V. crassifolium, V. darrowii, V. deliciosum, V. erythrocarpum, V. hirsutum, V. macrocarpon, V. membranaceum, V. myrsinites, V. myrtilloides, V. myrtillus, V. ovalifolium, V. ovatum, V. oxycoccos, V. pallidum, V. parvifolium, V. scoparium, V. stamineum, V. tenellum, V. vitis-idaea
Synonyms V. gaultherioides, V. occidentale, V. uliginosum subsp. alpinum, V. uliginosum var. alpinum, V. uliginosum subsp. gaultherioides, V. uliginosum subsp. microphyllum, V. uliginosum subsp. occidentale, V. uliginosum var. occidentale, V. uliginosum subsp. pedris, V. uliginosum subsp. pubescens, V. uliginosum var. salicinum
Name authority I. V. Hall & Aalders: Amer. J. Bot. 48: 200. 1961 , Linnaeus: Sp. Pl. 1: 350. 1753 ,
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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