. North American Bäume: Beschreibungen und Abbildungen der Bäume unabhängig von Anbau in Nordamerika wächst, nördlich von Mexiko und der Karibik. Bäume. 678 Die Buckthorns Seine Rinde ist dünn und grau. Die jungen Zweige sind grün, mehr oder weniger haarig, Rotbraun und immer glatt. Die Knospen sind nicht mehr als 2 mm. Lange, ihre Skalen haarige gesäumt. Die Blätter sind fest in der Textur, ovalen bis oval oder fast so breit wie lang, stark gezahnte mit Borsten spitze Zähne, glatt oder fast so, yeUow - Grün, stumpf, Spitze oder manchmal an der Spitze eingekerbt, stumpf oder schmale

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. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 678 The Buckthorns Its bark is thin and gray. The young twigs are green, more or less hairy, turning reddish brown and becoming smooth. The buds are not more than 2 mm. long, their scales hairy-fringed. The leaves are firm in texture, ovate to oval or nearly as wide as long, sharply toothed with bristle- tipped teeth, smooth or very nearly so, yeUow- green, blunt, pointed, or sometimes notched at the apex, blunt or narrowed at the base, 5 cm. long or less; the leaf-stalks are 2 to 10 mm. long. The polygamous or dioecious flowers are rather numerous in small clusters in the axils, and open from February to May, their stalks 2 to 5 mm. long; the 4 green calyx- lobes are about as long as the bell-shaped calyx-tube; there are usually no petals; the 4 stamens of the staminate flowers are about as long as the calyx-lobes, the anthers rather longer than the filaments; the pistillate flowers have 4 short rudimentary stamens, a 2-celled ovary with a slender style and 2 slender stigmas. The fruit is obovoid, red, 5 to 7 mm. long, its stalk about the same length; it contains 2 grooved nutlets.. Fig. 629. — Holly-leaved Buckthorn. 4. PEAR-LEAVED BUCKTHORN —Rhamnus pyrifolia Greene Inhabiting, so far as known, only the islands off the coast of southern California, this small evergreen tree sometimes attains a height of 10 meters, with a trunk up to 2 dm. thick, but is sometimes shrubby. It has been confused with Rhamnus insulus of Kellogg, which is endemic on Cer- ros island. Lower California. The bark is smooth, dark gray to nearly black, the young twigs densely and finely hairy, green, be- coming brown. The leaves are ob- long to broadly oval, firm in text- ure, short-stalked, smooth or nearly so on both sides when mature, blunt or roimded at both ends, or sometimes narrowed at the base, 2 to 7.5 cm.

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookdecade1900
• bookpublishernewyorkhholtandco