The principal trees are the oak, the valonia oak, the beech, ash, elm, plane, celtis, poplar and walnut, which give way in the higher regions to the pine and fir.
The valonia of commerce, one of the richest of tanning materials, is the acorn of Q.
The cups are the most valuable portion of the valonia, abounding in tannic acid; immature acorns are sometimes exported under the name of "camatina."
The island is of great fertility - wheat, oats, barley, olives, sesame and valonia being the principal products, in addition to a variety of fruits.
Chestnut woods are found in the Selino district, and forests of the valonia oak in that of Retimo; in some parts the carob tree is abundant and supplies an important article of consumption.
Exports in 1904 were valued at £419,642, the principal items being agricultural products (oranges, lemons, carobs, almonds, grapes, valonia, &c.), value £153,858, olives and products of olives-(oil, soap, &c.), £134,788, and wines and liquors, £48,544.
The site is now covered with valonia oaks, and has been much plundered, e.g by Mahommed IV., who took columns to adorn his new Valideh mosque in Stambul; but the circuit of the old walls can be traced, and in several places they are fairly well preserved.
It has a trade in cereals, cotton, opium, valonia and boracite and is connected by a carriage road with Balikisri.
Valonia, a material largely used by tanners, is the pericarp of an acorn obtained in the neighbouring oakwoods, and derives its name from Valona.
Coal, textiles and iron and steel goods figure prominently amongst the imports, and emery, leather, lemons, sponges, flour, valonia and iron ore amongst the exports.
Thus the protoand per-salts of iron, as well as the protoand per-salts of tin, including also a large variety of tannin, sumac, divi-divi, chestnut, valonia, the acacias (Areca Catechu and Acacia Catechu from India), from which are obtained cutch and gambier, &c., are no longer used solely as mordants or tinctorial matters, but mainly to serve the object of converting the silk into a greatly-expanded fibre, consisting of a conglomeration of more or less of these substances."
Preveza exports dairy produce, valonia, hides and wool, olives and olive oil.
The vineyards (in the west especially) yield much red wine (bought "mainly by Rouen, Cette, Trieste and Venice); the currant, introduced about 1859, has gradually come to be the principal source of wealth (the crop averaging 2,500,000 lb); and small quantities of cotton, flax, tobacco, valonia, &c., are also grown.
Valonia and Caulerpa among Siphonales detach portions of their thallus, which are capable of independent growth.
3 Trees are exceedingly scarce in the country; and the pine-woods on the western tributaries of the Sangarius and the valonia oaks in parts of the Banaz Ova and a few other districts form exceptions.
On the west coast the ilex, plane, oak, valonia oak, and pine predominate.
The exports are: - Cereals, cotton, cotton seed, dried fruits, drugs, fruit, gall nuts, gum tragacanth, liquorice root, maize, nuts, olive oil, opium, rice, sesame, sponges, storax, timber, tobacco, valonia, walnut wood, wine, yellow berries, carpets, cotton yarn, cocoons, hides, leather, mohair, silk, silk stuffs, rugs, wax, wool, leeches, live stock, minerals, &c. The imports are: - Coffee, cotton cloths, cotton goods, crockery, drysalteries, fezzes, glass-ware, haberdashery, hardware, henna, ironware, jute, linen goods, manufactured goods, matches, petroleum, salt, sugar, woollen goods, yarns, &c.
Under its Turkish name of Behram, Assus is still the commercial port of the southern Troad, being the place to which loads of valonia are conveyed by camels from all parts of the country.