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Quercus acutissima subsp. kingii NJM 13.077
A recent collection from Manipur of this extremely rare oak, endemic to the Western part of the species range, in the Eastern Himalaya etc. A fast growing tree to perhaps 12m tall in the wild. Glossy green leaves are up to 20cm long with multiple, closely set parallel veins ending in sharp forward pointing bristle tipped teeth.
Quercus aliena NJM 11.078
A collection from Guizhou, SW China, of this small growing species with fairly large, obovate, wavily toothed leaves. Rarely offered though hardy and handsome, resembling in many ways Q. prinus of the USA.
The N. American Swamp White Oak makes a medium sized very hardy tree in the UK to about 20m tall in the finest specimens. Trunks have particularly flaking bark and the shallowly lobed leaves are up to 18cm long, glossy green above and pale whiteish beneath, turning to golden yellow and russet in autumn. Not for thin chalky soils.
Quercus coccifera NJM 12.006 (new)
'Kermes Oak'. The classic dwarf scrub oak of the Mediterranean basin, looking more like a holly. This collection from SW Turkey. A slow growing, drought resistant evergreen shrub, eventually reaching 2m or more in a sunny site. The foliage often emerges in beautiful shades of copper-red. This is the host plant of the cochineal producing Kermes insect.
Quercus coccinea 'Splendens'
This selected form of the N American 'Scarlet Oak' is a magnificent sight when the very beautiful, deeply lobed foliage turns to a rich, glowing, bright red in the autumn sunlight. What other large tree can do this in the UK climate? Fast growing on most soils, making a grand specimen.
Quercus dentata 'Carl Ferris Miller'
The Daimyo oak from the Far East has spectacularly outsize foliage, superficially similar in form to our common oak, but many times the size. The twigs are very stout and plants can colour well in autumn, often with reds and oranges. This form, collected in Korea, performs very well in N. Europe. Usually a small to medium sized tree in this country.
Quercus durata (new)
A Californian endemic evergreen scrub oak with small holly-like spiny leaves, usually cupped and with a felted underside. Reaches a maximum of three meters tall, but usually much shorter.
Quercus ellipsoidalis 'Hemelrijk'
A form of this Pin oak relative, selected for its very reliable deep red autumn colour. A medium sized fast growing tree with a rounded crown on a short trunk and particularly handsome very deeply lobed leaves on slender petioles. An old favourite of mine, but not good on very thin limey soils.
An impressive oak from Southern Spain, collected originally near Jimena de la Frontera. This makes a perfectly hardy, drought tolerant small to medium evergreen tree of full, rounded form, with deeply fissured bark, the leaves with shallow, forward pointing lobes. Only ever really seen in specialist collections in the UK, for no good reason. Easy on most soil types.
Quercus frainetto 'Tortworth' (new)
A selection of this large, vigorous and rather magnificent species with even more deeply lobed leaves than is usual. The tree this is selected from is a rather splendid mature specimen at Tortworth Court, Gloucestershire, with strong radiating branches on a huge rounded crown over 30m tall.
Quercus ithaburensis subsp. macrolepis (new)
The Valonia oak has handsome grey-green hairy foliage, deeply and sharply lobed. The acorns are surrounded by huge very scaly cups. Rarely offered or seen this great looking oak makes a deciduous, hardy small to medium tree in the UK. From Turkish seed.
Quercus laurina NJM 05.013a (new)
A medium sized tree with fairly narrow evergreen foliage with shallow spine tipped lobes and the most superb, rich-red new growth. Collected west of Teziutlan, Puebla State, Mexico at 2100m alt. Fully hardy and even fully evergreen exposed in a field through Dec 2010 here in a rural frost hollow in Gloucestershire!
The Burr oak from N America makes a striking, characterful, medium sized hardy tree with huge foliage on young vigorous specimens up to 40cm long. The leaves are conspicuously lobed and covered on the underside by a pale mat of fine hairs. Bone hardy, but rarely seen here in the UK. Not for thin chalk soils.
Quercus muhlenbergii (new)
The Chinquapin oak ranges from E and C USA down into N Mexico and is rather rarely planted in the UK, though it forms a handsome hardy specimen. Foliage is coarsely toothed and with a pale underside, turning to rich autumn tints.
The Myrtle Oak hails from the Far S.E. USA where it makes an evergreen or semi-evergreen shrub or small tree with rigid, glossy, bright green, usually obovate foliage up to 5cm long. Very drought tolerant and hardy if given shelter.
The Cherrybark Oak from the moist bottomland forests of the SE USA is a close relation of Q. falcata and makes a fast growing tree up to about 20m in the UK. Leaves are along the lines of many red oak types, but the derivation of the name pagoda can be seen by turning a leaf on end. Splendid red autumn colour. Not for shallow chalk soils.
Quercus petraea subsp. iberica NJM 13.025
This is not from Spain or Portugal as the name might suggest, but actually a very rare eastern variant from SW Asia, the leaves having up to ten pairs of shallow lobes. These were found in the Eastern Caucasus in Azerbaijan. Highly drought resistant and completely hardy, making a fine large specimen oak.
The Mexican White Oak is rarely found in the UK, but is hardy and has reached at least 5m tall in Cambridgeshire. It will no doubt prefer the extra heat of the Southern Counties however. Unlobed to slightly lobed semi-evergreen ovate to elliptic foliage up to 15cm long. Reaches 20m in the wild and will no doubt do so in parts of Southern Europe too.
An unusual Southern European deciduous oak, with the downy grey-green foliage deeply dissected into narrow lobes, though highly variable throughout its range. Easy and hardy in the UK, it is also very drought tolerant: I have seen them growing on rocky south facing hillsides on the Italian Riviera. Makes a small to medium sized tree.
Quercus pubescens subsp. crispata NJM 12.016
A rare geographical form of this normally Southern European deciduous oak, found in Turkey, with the downy, grey-green foliage deeply dissected into narrow lobes, the foliage being tougher and slightly crisped. Easy and hardy in the UK, it is also very drought tolerant. Makes a small to medium sized tree.
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