Rhododendron quinquefolium • azalea

Rhododendron Rhododendron / Azalea •  シャクナゲ / ツツジ  • 石楠花 / 躑躅  •  shakunage / tsutsuji

Edited 4/29/13 – pic of leaves

Our Plant List says we have them in the shady areas ZZE and ZZW, along the Service Road – on a stroll today I discovered the one in ZZW: the leaves are not quite out yet, and the dainty flowers are rather sparse.


SJG • 4/10/13 – Rhododendron quinquefolium, azalea, area ZZW.  Not the best photo, but it gives you an idea where to look: traveling N on the Service Road, you will pass the bench and 2 dwarf bamboo clumps (lower L of the pic), then you’ll meet it in at 7′ tall.  I’ll watch it for the next couple of weeks – will post a better photo, if it happens so…


SJG • 4/10/13 – Rhododendron quinquefolium, azalea; area ZZW, FLOWER, described in the Plant List as: ‘ whorls of 5 leaves, corolla white’. The leaves are barely there,  so stay tuned for a better pic, if I catch it.


SJG • 4/29/13 – Rhododendron quinquefolium, azalea; area ZZW, LEAVES. The specific name, ‘quinquefolium’, means ‘having five leaves’

From HirsutumR. quinquefolium; In cultivation since: 1893; First described: 1871, (Maxim.); Origin: Korea and NE Manchuria in open woodlands […]  From their website’s pics it seem like the leaves do something amazing in fall: turn sharp red edges,  then completely red – will watch…

From Millais Nurseries in England:  Known as the ‘Cork Azalea’. This plant has pure white flowers spotted green, that open with the leaves in April. Delicate leaves appear in whorls of 4 or 5, sometimes edged in red. A fine collectors plant from Japan which requires a choice position. Hardy, but it does need shelter when young. […]

From rosebay.org:   Rhododendron quinquefolium.  This white-flowered Asian azalea is in Subgenus Pentanthera, Section Sciadorhodion. It is part of the distinct group of deciduous azaleas, which have whorled leaves. The specific name, ‘quinquefolium’, means ‘having five leaves’; the plant is also referred to as Cork Azalea, a name which comes from its gray-brown corky bark.

This graceful, compact plant with spectacular autumn color is slow growing as a young plant. It reaches 2-3 feet in cultivation and is a rather dainty shrub, wider than high. Its leaves unfurl in whorls of 5 on the tips of branches and are light green, often tinged along the edges with red. In the wild it can grow up to 15 feet in height. It grows in central Japan above 3000 feet in shady ravines. It forms great masses and intermingles with R. pentaphyllum, usually pink, with R. degronianum growing underneath. […]

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