Flora of North America species comparison

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Therorhodion camtschaticum

Kamchatka rhododendron
Habit Shrubs usually to 2 dm.
Stems

multicellular, eglandular-hairy (hairs unbranched), sometimes also stipitate-glandular-hairy, glabrate with age.
Leaves

often clustered toward distal portions of shoots;

blade elliptic to obovate, 1–4.5(–6) × 0.7–2.4 cm, thin, margins ciliate (hairs eglandular), plane, apex rounded to obtuse or acute, mucronate, surfaces usually eglandular-hairy, sometimes sparsely glandular-hairy.
Inflorescences

2–3-flowered, sometimes flowers solitary;

axis elongate.
Pedicels

1–4.7 cm, eglandular- and/or stipitate-glandular-hairy;

bracteoles 2, green, smaller than leaves.
Flowers

opening after shoot development, appearing to terminate leafy shoots due to their leaflike bracts;

calyx lobes 8–21 mm, eglandular- and/or stipitate-glandular-hairy;

corolla purple to, rarely, white, upper 3 lobes with darker spots, 19–32 mm, margins ciliolate, unicellular-hairy on outer surface, tube ± absent due to slit between lower 2 lobes, lobes 12–26 mm;

stamens unicellular-hairy proximally.
Capsules

6–11 mm, unicellular-hairy.
Floral

bud scales (and leaflike inflorescence bracts) eglandular-hairy, sometimes also stipitate-glandular-hairy.
2n

= 24, 26.

Therorhodion camtschaticum
Phenology Flowering summer.
Habitat Arctic and alpine tundra and heathlands, meadows, and subalpine woods
Elevation 0-1500 m (0-4900 ft)
Distribution
from FNA
AK; e Asia (Japan, Russian Far East)
[BONAP county map]
Discussion

Therorhodion camtschaticum is found in the coastal and southern insular regions.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 454.
Parent taxa Ericaceae > subfam. Ericoideae > Therorhodion
Sibling taxa
T. glandulosum
Synonyms Rhododendron camtschaticum
Name authority (Pallas) Small: in N. L. Britton et al., N. Amer. Fl. 29: 45. 1914 ,
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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