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mountain American-laurel, mountain laurel

Habit Shrubs or, rarely, trees, erect, (1–)2–8(–12) m. Twigs terete, viscid, stipitate-glandular, glabrescent.
Leaves

alternate (seemingly whorled on slow-growing twigs);

petiole 10–30 mm, glabrous or puberulent, sometimes stipitate-glandular;

blade elliptic to elliptic-lanceolate, 4–12 × 1.5–5 cm, margins plane, apex acute, surfaces stipitate-glandular, glabrescent abaxially, glabrous, midrib puberulent adaxially.

Inflorescences

terminal, panicles, (12–)20–40-flowered.

Pedicels

20–40 mm.

Flowers

sepals green to reddish, usually oblong, 3–3.5 mm, apex acute, surfaces glabrous or stipitate-glandular;

petals connate nearly their entire lengths, usually pink (ranging from deep red to white) with purple spots around each anther pocket, 20–25 × 15–30 mm, abaxial surface usually lightly stipitate-glandular, adaxial puberulent;

filaments 4–5 mm;

style 10–18 mm.

Capsules

5-locular, 3–5 × 4–7 mm, stipitate-glandular.

Seeds

winged, obovoid and curved, 0.5–1 mm.

2n

= 24.

Kalmia latifolia

Phenology Flowering Apr–Jun.
Habitat Rocky or sandy hardwood forests on mountain slopes, stream bluffs, ravines, or in pure, dense thickets
Elevation 0-1900 m (0-6200 ft)
Distribution
from FNA
AL; CT; DE; FL; GA; IN; KY; LA; MA; MD; ME; MS; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WV [Introduced in Europe (England)]
[WildflowerSearch map]
[BONAP county map]
Discussion

Kalmia latifolia is a showy and beautiful American indigenous plant. E. S. Rand (1871) wrote that “no words can describe the beauty of this plant on the mountains of the Middle States, where it covers acres, and sheets whole hillsides with pink and white.”

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

Source FNA vol. 8, p. 482.
Parent taxa Ericaceae > subfam. Ericoideae > Kalmia
Sibling taxa
K. angustifolia, K. buxifolia, K. cuneata, K. hirsuta, K. microphylla, K. polifolia, K. procumbens
Synonyms Chamaedaphne latifolia, K. latifolia var. laevipes
Name authority Linnaeus: Sp. Pl. 1: 391. 1753 ,
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