EXPLANATIONS 



Xlll 



A display of a scheme would stand as follows: 



A. Leaves, etc. 



B. Flowers, etc. 

 c. Fruits, etc. 

 D. Pods, etc. 

 DD. Pods, etc. 



E. Seeds, etc. 

 EE. Seeds, etc. 

 cc. Fruits, etc. 

 BB. Flowers, etc. 

 AA. Leaves, etc. 



B. Roots, etc. 



c. Flowers, etc. 



D. Margins of leaves, etc. 

 DD. Margins of leaves, etc. 

 cc. Flowers, etc. 

 BB. Roots, etc. 

 BBB. Roots, etc. 

 AAA. Leaves, etc. 



When the genus is large or the treatment is compli- 

 cated, the key may be placed seijarately at the begin- 

 ning rather than to be divided among the paragraphs; 

 tliis allows the student to see the entire scheme or 

 plan at once. See Acer, page 196. 



ABBREVIATIONS OF BOTANICAL TERMS 

 AND GENERAL EXPRESSIONS 



BOOKS AND PERIODICALS 



To aid the student in the verification of the work, 

 and to introduce him to the literature of the various 

 subjects, citations are made to the portraits of plants 

 in the leading periodicals to which the American 

 referrer is most hkely to have access. These references 

 to pictures have been verified, as far as possible, both 

 in the MS. and in the proof. A uniform and regular 

 form of citation is much to be desired, but is extremely 

 difficult to secure because periodicals rarely agree in 

 methods. It was decided to omit the year in most cases, 

 because of the pressure for space, but the student who 

 lacks access to the original volumes may usually 

 ascertain the year by consulting the bibliographical 

 notes below. 



An arbitrary and brief method of citation has 

 been chosen. At the outset it seemed best to indicate 

 whether the cited picture is colored or not. This ac- 

 counts for the two ways of citing certain publications 

 containing both kinds of pictures, as The Garden, 

 Revue Horticole, and Gartenflora. The figures given 

 below explain the method of citation, and incidentally 

 give some hints as to the number of volumes to date, 

 and of the number of pages or plates in one of the latest 

 volumes. 



Standard works on the bibliography of botany 

 are Pritzel's "Thesaurus" and Jackson's "Guide to 

 the Literature of Botany;" also, Jackson's "Catalogue 

 of the Library of the Royal Botanic Gardens, Kew." 

 Rehder's "Bradley Bibliography," a guide to the 

 literature of the woody plants of the world, is invalu- 

 able. The Catalogue of the Library of the Arnold 

 Arboretum, Harvard University, now being printed, 

 will afford an excellent guide to the hterature of botany, 

 particularly as it relates to woody plants. 



A.F. . . . The American Florist. Chicago. A trade 

 paper founded August 15, 1885. The vol- 

 umes end with July. Many pictures re- 

 peated in "Gng." (14: 1524=vol. and page.) 



A.G. . . . American Gardening. New York. Represents 

 14 extinct horticultural periodicals, includ- 

 ing The American Garden (1888-1890). 

 (20:896=vol. and page.) 



B The Botanist. Edited by Maund. No years 



on title pages. Founded 1839. Eight vols., 

 50 colored plates in each vol. (8:400 = 

 vol. and col. plate.) Cumulative index. 



B.B. . . Britton & Brown. An Illustrated Flora of the 

 Northern U. S., etc. New York, 1896 98. 

 Ed. 2 in 1913. (3:588=voI. and page of ed. 

 1; (ed. 2) 3:=vol. and page of ed. 2). 



B.H. ... La Belgique Horticole. Ghent. 35 vols. 

 (1851-1885). 



B.M. . . . Curtis' Botanical Magazine. London. 

 Founded 1787. The oldest current peri- 

 odical devoted to garden plants. The vol. 

 for 1912 is vol. 138 of the whole work. 

 Index to first 107 vols, by E. Tonks. 

 London. (7690=col. plate.) 



B.R. . . . Botanical Register (1815-1847). Vols. 1-14 

 edited by Edwards; vols. 15-33 by Lind- 

 ley. In vols. 1-23 the plates are numbered 

 from 1-2014. In vols. 24-33 they are num- 

 bered independently in each vol. There are 

 688 plates in vols. 24-33. "An Appendix to 

 the First Twenty-three Volumes" (bound 

 separately or with the 25th vol.) contains 

 an index to the first 23 vols. An index to 

 vols. 24-31 may be found in vol. 31. (1198 = 

 col. plate. 33: 70= vol. and col. plate.) 



