Flora of North America species comparison

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Vaccinium hirsutum

Vaccinium oxycoccos

hairy blueberry, small cluster blueberry, woolly berry, wooly berry

bog cranberry, canneberge commune, small cranberry, swamp cranberry, wild cranberry
Habit Plants forming open colonies, 2–5(–7.5) dm; twigs green, slightly angled, pilose or hairy. Plants trailing, shoots 0.1–0.3(–0.5) dm.
Leaves

deciduous;

blade green, elliptic, 23–62 × 10–36 mm, subcoriaceous, margins entire, surfaces densely hairy, eglandular abaxially.

blades glaucous abaxially, green adaxially, ovate, sometimes elliptic, 3–10 × 1–5 mm, coriaceous, margins entire, strongly revolute.
Inflorescences

in axils of leaflike bracts at base of previous year’s or older shoots, (leafy portion often failing to elongate).
Pedicels

nodding, slender, 2–3 cm, bracteolate or not;

bracteoles 1–5, reddish, scalelike, to 1 mm wide.
Flowers

calyx green, glandular-hairy;

corolla white, cylindric, 5–9 mm, (glandular-hairy);

filaments hairy.

calyx lobes relatively small;

corolla strongly reflexed at anthesis, white to deep pink;

filaments hairy;

anther tubules 2–2.5 mm.
Berries

black, 7–9 mm diam., hairy.

deep red, red-spotted at first, 6–12 mm diam., smooth.
Seeds

3–9, ca. 1 mm.

2n

= 48.

= 24, 48, 72.

Vaccinium hirsutum

Vaccinium oxycoccos
Phenology Flowering summer. Flowering early summer.
Habitat Dry oak-pine ridges and mountain meadows Half buried in Sphagnum hummocks in bogs, fens, muskeg, arctic-alpine tundra
Elevation 600-1500 m (2000-4900 ft) 0-1500 m (0-4900 ft)
Distribution
from FNA
GA; NC; TN
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CA; CT; ID; IL; IN; MA; MD; ME; MI; MN; NH; NJ; NY; OH; OR; PA; RI; VT; WA; WI; WV; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; n Europe; n Asia
[WildflowerSearch map]
[BONAP county map]
Discussion

Vaccinium hirsutum is uncommon (but not threatened) in Tennessee, rare in North Carolina, and probably extirpated in Georgia.

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

Vaccinium oxycoccos is interruptedly circumboreal (absent from the Canadian Arctic Archipelago, including Baffin Island) extending southward in North America to California in the Cascade Range and to West Virginia in the Appalachian Mountains.

In Europe, some chromosome races of Vaccinium oxycoccos have been given specific rank (S. P. Vander Kloet 1983) at one time or another; unfortunately, hexaploids cannot be differentiated consistently from diploids or tetraploids using morphological features such as leaf indumentum or bract size.

On most vines, especially north of 50° north latitude, the leafy portion of the fertile shoot fails to develop, giving the illusion that Vaccinium oxycoccos has an inflorescence comprising a short rachis bearing flowers on a slender pedicel.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 529. FNA vol. 8, p. 519.
Parent taxa Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Cyanococcus Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Oxycoccus
Sibling taxa
V. angustifolium, V. arboreum, V. boreale, V. cespitosum, V. corymbosum, V. crassifolium, V. darrowii, V. deliciosum, V. erythrocarpum, 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. pallidum, V. parvifolium, V. scoparium, V. stamineum, V. tenellum, V. uliginosum, V. vitis-idaea
Synonyms Cyanococcus hirsutus Oxycoccus hagerupii, Oxycoccus intermedius, Oxycoccus microcarpus, Oxycoccus ovalifolius, Oxycoccus oxycoccos, Oxycoccus palustris, Oxycoccus palustris var. intermedius, Oxycoccus palustris subsp. microphyllus, Oxycoccus palustris var. ovalifolius, Oxycoccus quadripetalus, Oxycoccus quadripetalus var. microphyllus, V. microcarpum, V. oxycoccos var. intermedium, V. oxycoccos subsp. microphyllum, V. oxycoccos var. microphyllum, V. oxycoccos var. ovalifolium
Name authority Buckley: Amer. J. Sci. Arts 45: 175. 1843 , Linnaeus: Sp. Pl. 1: 351. 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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