1000. Collections of botanical descriptions may be of different sorts, as 1. Monographs, or descriptions of one genus, tribe, or class, as Lindley's Monographia Rosarum. 2. Floras, or an enumeration of the plants of any one district or country, as Smith's Flora Britannica. 3. Gardens, or an enumeration, descriptive or nominal, of the plants cultivated in any one garden, as Aiton's Hortus Kewensis. 4. General works, in which all known plants are described, as De Candolle's Systema Naturale, Willdenow's Species Plantarum, and Persoon's Synopsis Plantarum. All these classes of books may be with or without plates or figures ; and these, again, may be of part or of the whole plant, and coloured or plain, &c.