Therorhodion camtschaticum

(Pallas) Small in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 29: 45. 1914 ,.

Common names: Kamchatka rhododendron
Basionyms: Rhododendron camtschaticum Pallas Fl. Ross. 1(1): 48, plate 33 [as kamtschaticum]. 1784
Treatment appears in FNA Volume 8. Treatment on page 454.

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. Floral bud-scales (and leaflike inflorescence bracts) eglandular-hairy, sometimes also stipitate-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. 2n = 24, 26.


Phenology: Flowering summer.
Habitat: Arctic and alpine tundra and heathlands, meadows, and subalpine woods
Elevation: 0-1500 m

Distribution

V8 894-distribution-map.gif

Alaska, e Asia (Japan), e Asia (Russian Far East)

Discussion

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

Selected References

None.

Lower Taxa

None.

"/3" is not declared as a valid unit of measurement for this property.

Kathleen A. Kron +  and Walter S. Judd +
(Pallas) Small in N. L. Britton et al. +
elongate +
furrowed +  and smooth +
not flaky +
Rhododendron camtschaticum +
4.5 cm45 mm <br />0.045 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
elliptic;obovate +
membranous;chartaceous +
thin;0.7cm;2.4cm +
stipitate-glandular-hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
unicellular-hairy +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Kamchatka rhododendron +
Alaska +, e Asia (Japan) +  and e Asia (Russian Far East) +
0-1500 m +
undifferentiated +
fusiform +
stipitate-glandular-hairy +  and eglandular-hairy +
pendulous +  and erect +
Arctic and alpine tundra and heathlands, meadows, and subalpine woods +
unicellular +, eglandular +, glandular +, long-stipitate +  and simple +
terminal +  and axillary +
deciduous +  and persistent +
12mm +  and 26mm +
serrulate +  and entire +
unicellular-hairy +  and ciliolate +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
stipitate-glandular-hairy +
1 cm10 mm <br />0.01 m <br /> (4.7 cm47 mm <br />0.047 m <br />) +
reduced +
not sticky +
Flowering summer. +
4-5-carpellate +
in N. L. Britton et al., N. Amer. Fl. +
reduced +
not +  and winged +
distinct +
ellipsoidal +
unicellular-hairy +
multicellular +
procumbent +  and sprawling +
creeping +  and sprawling +
peltate +  and capitate +
straight +
glandular-hairy +  and eglandular-hairy +
Undefined tribe Empetraceae +
Therorhodion camtschaticum +
Therorhodion +
species +
achlorophyllous +  and chlorophyllous +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +