Recipes starting with O

The sessile oak is a large deciduous tree up to 20–40 m (66–131 ft) tall, in the white oak section of the genus (Quercus sect. Quercus) and similar to the Pedunculate oak, Q. robur, with which it overlaps extensively in range. The leaves are 7–14 cm (2.8–5.5 in) long and 4–8 cm broad, evenly lobed with five to six lobes on each side, and a 1 cm petiole. The flowers are catkins, produced in the spring. The fruit is an acorn 2–3 cm long and 1–2 cm broad, which matures in about six months.

Quercus robur is a large deciduous tree, with circumference of grand oaks from 4 m (13') to exceptional 12m (40'). Majesty Oak with the circumference of 12,2 m (40') is the thickest tree in Great Britain, but Kaive Oak in Latvia with the circumference of 10,2 m (33,5') is the thickest tree in Northern Europe. Q. robur has lobed and nearly sessile (very short-stalked) leaves 7–14 cm long. Flowering takes place in mid spring, and their fruit, called acorns, ripen by the following autumn.

The acorns are 2–2.5 cm long, pedunculate (having a peduncle or acorn-stalk, 3–7 cm long) with one to four acorns on each peduncle.

The shape of the oak leaves is too familiar to need description. The flowers are of two kinds; the male, or barren, in long drooping catkins, 1 to 3 inches long, appearing with the leaves, and the leaves and the fertile flowers in distant clusters, each with a cup-shaped, scaly involucre, producing, as fruit, an acorn 1/2 to 1 inch long. 

 The Oak is noted for the slowness of its growth, as well as for the large size to which it attains.

This much-branched evergreen tree varies in size from 2 to 15 m high. The leaves have an opposite, decussate arrangement, and are entire, 3 to 7 cm long and 0.8 to 2.5 cm wide; the apex is acute with a small hook or point, and the base is attenuate to cuneate. Leaf margins are entire and recurved, the upper surface is grey-green and glossy, and the lower surface has a dense covering of silvery, golden or brown scales. Domatia are absent; venation is obvious on the upper surface and obscure on the lower surface; the petiole is up to 10 mm long. Fruit are borne in panicles or racmes 50 to 60mm long. The calyx is four-lobed, about 1mm long. The corolla is greenish-white or cream; the tube is 1 to 2mm long; lobes are about 3mm long and reflexed at the anthesis. The two stamens are fused near the top of the corolla tube, with bilobed stigma. The globose to ellipsoid fruit is a drupe, 6mm in diameter and 15 to 25 mm long; it is fleshy, glaucous to a dull shine when ripe, and purple-black. The tree usually flowers in spring. The wood is much-prized and durable, with a strong smell similar to bay rum, and is used for fine furniture and turnery.

It is a small tree with a smooth, greyishbrown bark and branches that spread into a fairly regular hemisphere. The oval, alternate, evergreen leaves, 3 to 4 inches long, have sometimes a spine in the axil. They are glossy, dark green on the upper side, paler beneath. The calyx is cup-shaped and the thick, fleshy petals, five in number, are intensely white, and curl back.

The fruit is earth-shaped, a little rougher and darker than the common, sweet orange: the flowers are more strongly scented and the glands in the rind are concave instead of convex.

They are all large, deciduous trees, 25–40 metres (82–131 ft) tall, with palmately 3- to 7-lobed leaves arranged spirally on the stems and length of 12.5 to 20 centimetres (4.9 to 7.9 in), having a pleasant aroma when crushed.[3] Mature bark is grayish and vertically grooved.[3] The flowers are small, produced in a dense globular inflorescence 1–2 centimetres (0.39–0.79 in) diameter, pendulous on a 3–7 centimetres (1.2–2.8 in) stem. The fruit is a woody multiple capsule 2–4 centimetres (0.79–1.57 in) in diameter (popularly called a "gumball"), containing numerous seeds and covered in numerous prickly, woody armatures, possibly to attach to fur of animals. The woody biomass is classified as hardwood. In more northerly climates, sweetgum is among the last of trees to leaf out in the spring, and also among the last of trees to drop its leaves in the fall, turning multiple colors