Download A revision of Clavija - Opera Botanica 107 (Theophrastaceae) by Bertil Ståhl. PDF

By Bertil Ståhl.

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Example text

Orlando, FL: Academic Press, 1984. Alliaceae The Alliaceae or onion family was once included in the monocot family Liliaceae, but is now recognized by many as a separate plant family. The family includes herbaceous (nonwoody) monocot plants that are generally perennial but not evergreen. Most are native to dry or moderately moist regions and other open areas. The family includes bulb or corm-forming plants as well as plants without bulbs or corms. Leaves may be round, flat, or angular in cross section and are alternately or spirally arranged.

The component tissues of the leaf are the epidermis, the mesophyll, and the vascular bundles. The epidermis is formed from the surface cell layer of the stem apical meristem. The epidermis serves a protective function. Vascular bundles, also called veins, are cylindrical traces of xylem and phloem that diverge from the stem’s central stele. The leaf ’s midvein is the largest medianly positioned vascular bundle. Minor leaf veins develop laterally on either side of the midvein. Both the midvein and minor veins differentiate through the stalk of the leaf (the petiole) into its flat blade.

Since many of the variables that go into wine production are not controllable by the wine producers, differences are bound to occur in each production cycle. The variation in wine flavors is therefore unending and the source of fascination for many who appreciate wine. Beer Among the oldest records of the production and use of alcoholic beverages is that of beer, which originated in Mesopotamia and the Babylonian regions of Asia at least fifty-five hundred years ago. Beer is a beverage obtained by fermenting carbohydrate-containing extracts of various grains with yeast.

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