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alpine-azalea, trailing azalea

Habit Shrubs much-branched and mat-forming, ca. 0.1 m. Twigs terete or slightly 2-angled proximal to node, glabrous or sparsely hairy.
Leaves

opposite;

petiole absent or 0.1–2 mm, glabrous or puberulent;

blade ovate or oval to narrowly lanceolate, 0.3–0.8 × 0.2–0.4 cm, margins revolute, apex obtuse, abaxial surface tomentulose, adaxial glabrous or sparsely puberulent toward base, midribs with stalked glands/purple clavate trichomes.

Inflorescences

terminal, corymbiform racemes or umbels, 2(–6)-flowered, sometimes flowers solitary.

Pedicels

5–20 mm.

Flowers

sepals crimson, ovate-lanceolate, 1.2–1.5 mm, apex obtuse, surfaces glabrous, margins ciliate;

petals (spreading), connate ca. 1/2 their lengths, light to deep pink or white, 3–5 × 2–3.5 mm, glabrous;

stamens 5;

filaments 2–3 mm;

style 0.5–0.8 mm.

Capsules

2–3-locular, 3–4 × 3–4 mm, glabrous.

Seeds

winged, oblong, 0.5–1.4 mm.

2n

= 24.

Kalmia procumbens

Phenology Flowering Jun–Aug.
Habitat Dry to moist, subarctic, arctic, and alpine tundra, coastal marshes
Elevation 0-2500 m (0-8200 ft)
Distribution
from FNA
AK; ME; NH; NY; WA; WY; AB; BC; MB; NL; NT; NU; ON; QC; SK; YT; c Europe; Greenland; n Europe; n Asia
[WildflowerSearch map]
Discussion

Kalmia procumbens is the only species of the genus that is not endemic to North America. An attractive dwarf shrub, it is sometimes cultivated in rock gardens.

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

Source FNA vol. 8, p. 485.
Parent taxa Ericaceae > subfam. Ericoideae > Kalmia
Sibling taxa
K. angustifolia, K. buxifolia, K. cuneata, K. hirsuta, K. latifolia, K. microphylla, K. polifolia
Synonyms Azalea procumbens, Chamaecistus procumbens, Loiseleuria procumbens, Rhododendron procumbens
Name authority (Linnaeus) Gift, Kron & P. F. Stevens ex Galasso, Banfi & F. Conti: F. Conti et al., Annot. Checkl. Ital. Vasc. Fl. 20. (2005)
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