Rhododendron periclymenoides (Michx.) Shinners

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Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Rhododendron periclymenoides' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-periclymenoides/). Accessed 2020-09-18.



  • Azalea nudiflora L., nom. illegit.
  • Azalea periclymenoides Michx.
  • Rhododendron nudiflorum (L.) Torr.

Other species in genus


Immature shoot protected by scales that develops into leaves and/or flowers.
(pl. calyces) Outer whorl of the perianth. Composed of several sepals.
The inner whorl of the perianth. Composed of free or united petals often showy.
Lacking hairs smooth. glabrescent Becoming hairless.
Bearing glands.
midveinCentral and principal vein in a leaf.


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Article from Bean's Trees and Shrubs Hardy in the British Isles

Recommended citation
'Rhododendron periclymenoides' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/rhododendron/rhododendron-periclymenoides/). Accessed 2020-09-18.

Deciduous shrub or small tree, to 5 m; young twigs eglandular-hairy. Leaves 5.2-9(-ll) x 1.5-3(-3.5) cm, ovate or obovate to elliptic, lower surface eglandular-hairy, or glabrous. Flower bud scales with outer surface glabrous or occasionally covered with unicellular hairs; margin unicellular-ciliate, rarely also glandular. Pedicels covered with unicellular and/or multi-cellular eglandular hairs. Flowers with a sweet fragrance, appearing before or with the leaves, 6-15, in a shortened raceme; calyx 1-2(-4) mm; corolla deep pink, sometimes with a dark pink to crimson tube, funnelform, tube gradually expanding into limb, outer surface covered in a mixture of eglandular and gland-tipped hairs, 20-47 mm. Capsules eglandular-hairy. Flowering May-June. Royal Horticultural Society (1997)

Distribution  United States E

Habitat 100-1,000 m

RHS Hardiness Rating H6

Conservation status Least concern (LC)

Taxonomic note Allied to R. canescens but differing in the usually glabrous flower bud scales and the more gradually tapering corolla tube. The name R. nudiflorum, used in the past for this plant, is illegitimate. Royal Horticultural Society (1997)

A deciduous azalea up to 9 ft high in its native state; young wood bristly Leaves mostly obovate, some oblong, tapering at both ends, 112 to 312 in. long, one-third to half as wide, green on both sides with a few scattered hairs above, bristly on the midrib beneath and on the margins. Flowers faintly scented, in clusters of six or more, the corolla-tube hairy, pink, 34 in. long; the five lobes paler, expanding, and giving the flower a diameter of 112 to 2 in.; stalk 13 to 12 in. long, bristly like the small calyx; stamens five, pinkish coloured, standing out well beyond the corolla; seed-vessels 34 in. long, bristly. Blossoms in May. (s. Azalea ss. Luteum)

Native of eastern N. America; introduced by Peter Collinson in 1734. It is one of the chief parents of the great race of garden azaleas, but is itself very rarely seen now. The flowers appear to be variable in colour, even in a wild state, although of some shade of red or pink, or purplish. Of the N. American azaleas, whose flowers expand before the leaves, this differs from R. calendulaceum in the longer-tubed, differently coloured corolla, and in the bristly midrib of the leaf, and from R. canescens in the hairy, not glandular, corolla-tube.


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