Rhododendron canescens (Michx.) Sweet

Mountain azalea (en)

Species

Angiosperms > Ericales > Ericaceae > Rhododendron

Characteristics

Shrubs or trees, to 6 m, usually not rhizomatous. Stems: bark smooth to vertically furrowed, shredding; twigs scattered, multicellular eglandular-and/or stipitate-glandular-hairy (hairs unbranched), otherwise moderately to densely unicellular-hairy. Leaves deciduous; petiole usually multicellular eglandular-or stipitate-glandular-hairy, also unicellular-hairy; blade ovate to obovate, 2.5-10(-13) × 1.2-3(-4) cm, thin, membranous to chartaceous, margins entire, rarely minutely serrulate, plane, inconspicuously ciliate, eglandular-hairy (hairs appressed to margins), apex acute to obtuse, often mucronate, abaxial surface densely to sparsely unicellular-hairy, sometimes glabrous or glabrate, often also scattered eglandular-hairy, adaxial surface usually scattered eglandular-hairy, otherwise sparsely unicellular-hairy, sometimes glabrous. Floral bud scales ± densely unicellular-hairy abaxially, margins usually unicellular-ciliate. Inflorescences 6-19-flowered; bracts similar to bud scales. Pedicels 4-17 mm, usually eglandular-hairy, rarely stipitate-glandular-and/or eglandular-hairy, otherwise sparsely to densely unicellular-hairy. Flowers opening before or with leaves, erect to horizontal, fragrant (usually musky-scented); calyx lobes 0.5-4 mm, surfaces and margins scattered stipitate-glandular-and/or eglandular-hairy, otherwise usually densely unicellular-hairy; corolla deep pink to white with pink tube, without blotch on upper lobe, funnelform, 23-46 mm, scattered, multicellular stipitate-glandular-hairy (hairs not forming distinct lines), otherwise sparsely to densely unicellular-hairy on outer surface, petals connate, lobes 7-20 mm, tube ± gradually expanded into lobes, 13-27 mm (equaling or longer than lobes); stamens 5, much exserted, ± unequal, 31-64 mm. Capsules borne on erect pedicels, 12-33 × 3-6.5 mm, usually sparsely to moderately eglandular-hairy, otherwise ± densely unicellular-hairy. Seeds without distinct tails, flattened portion of testa well developed at each end; testa expanded, dorsiventrally flattened, ± loose. 2n = 26.
More
Tall shrub, sometimes to 5 m, usually not colonial; lvs felty-pubescent beneath; pedicels and cor-tube densely and finely pubescent as well as stipitate-glandular; cor white to more often pink, the tube longer than the lobes, rather abruptly expanded to the limb; stamens ca 3 times as long as the cor-tube; ovary densely strigose, fr sparsely so, not glandular. Moist woods; chiefly on the piedmont and coastal plain; Del. to Fla. and Tex. Apr., early May.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 1.0
Mature height (meter) 4.15 - 4.3
Root system -
Rooting depth (meter) 0.4
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 3-5
Soil humidity 4-6
Soil texture -
Soil acidity 1-3
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses environmental use
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 50 - 90
Germination temperacture (C°) 12 - 15
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Rhododendron canescens habit picture by Maarten Vanhove (cc-by-sa)

Leaf

Rhododendron canescens leaf picture by Burns Francis (cc-by-sa)
Rhododendron canescens leaf picture by Reuben Atkins (cc-by-sa)
Rhododendron canescens leaf picture by Maarten Vanhove (cc-by-sa)

Flower

Rhododendron canescens flower picture by Therese Stewart (cc-by-sa)
Rhododendron canescens flower picture by Jenn Mackert (cc-by-sa)
Rhododendron canescens flower picture by William Wattles (cc-by-sa)

Distribution

Rhododendron canescens world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:30117552-2
WFO ID wfo-0001047067
COL ID 4SFKR
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rhododendron canescens