Flora of North America species comparison

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Vaccinium cespitosum

Vaccinium hirsutum

airelle gazonnante, dwarf bilberry, dwarf blueberry, dwarf huckleberry

hairy blueberry, small cluster blueberry, woolly berry, wooly berry
Habit Plants forming dense colonies, 0.3–6 dm, superficially rhizomatous; twigs yellow-green, reddish green, or reddish brown, terete to somewhat angled, finely puberulent or, rarely, glabrous. Plants forming open colonies, 2–5(–7.5) dm; twigs green, slightly angled, pilose or hairy.
Leaves

blades green, usually oblanceolate, sometimes obovate or narrowly elliptic, 10–30 × 3–12 mm, margins usually serrulate from apex to at least mid blade, surfaces usually glandular abaxially, usually glabrous adaxially.

deciduous;

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

calyx pale green, lobes vestigial, glabrous;

corolla white, white with pink striping, or pink, cylindric-urceolate to globose, 4–7 × 3–5 mm, thin, glaucous;

filaments glabrous.

calyx green, glandular-hairy;

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

filaments hairy.
Berries

usually blue, glaucous, rarely dull black, 5–9 mm diam.

black, 7–9 mm diam., hairy.
Seeds

ca. 1 mm.

3–9, ca. 1 mm.
2n

= 24.

= 48.

Vaccinium cespitosum

Vaccinium hirsutum
Phenology Flowering late spring-mid summer. Flowering summer.
Habitat Open, usually dry habitats, from lowland to subalpine areas Dry oak-pine ridges and mountain meadows
Elevation 0-4500 m (0-14800 ft) 600-1500 m (2000-4900 ft)
Distribution
from FNA
AK; CA; CO; ID; ME; MI; MN; MT; NH; NM; NY; OR; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; QC; SK; YT; Mexico (Chihuahua, Durango, Hidalgo); Central America (Guatemala)
[WildflowerSearch map]
from FNA
GA; NC; TN
[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.)
Source FNA vol. 8, p. 524. FNA vol. 8, p. 529.
Parent taxa Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Myrtillus Ericaceae > subfam. Vaccinioideae > Vaccinium > sect. Cyanococcus
Sibling taxa
V. angustifolium, V. arboreum, V. boreale, 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. 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
Synonyms V. arbuscula, V. caespitosum var. arbuscula, V. caespitosum var. paludicola, V. geminiflorum, V. nivictum, V. paludicola Cyanococcus hirsutus
Name authority Michaux: Fl. Bor.-Amer. 1: 234. 1803 , Buckley: Amer. J. Sci. Arts 45: 175. 1843 ,
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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