236 THE JOURNAL OF BOTAN'T 



(not S. longifolium Turez. (1S3S) a Siberian plant). Gray (Man. Bot. 

 X. U.S. ed. 4, 430; I860) remarks under 8. nutans L. var. affiue 

 Fries, " this may be S. august ifolium of Michaux, as is generally 

 thought, but Fries assigns this to the next." In the fifth edition 

 (1S79) p. 481, under iS. simplex Huds. var. angu&tifolium, Gray 

 quotes " S. augustifolium Miehx. S. affine Schnizlein." In 1888 

 Morong (Bull. Ton*. Bot. Club, 79) remarks : " Engelman has seen 

 Michaux's specimen at Paris, and it is the same as affine.'" Britton 

 (Man. Fl. N. States, 1901, p. 40) has " S. simplex august ifolium 

 (Michx.) Engelm." but does not name affine. Schnizlein's plant dates 

 from 1845 ( Nat. Pfl. Fam. d. Typhaice), Michaux's from 1803 — Fl. 

 Bor. Am. ii. 189. A revision of the American plants which have 

 been confused with S. simplex is given in Hhodora, ix. 87-9 (1917). 

 In the last ed. of Bab. Man. (edited by Messrs. Groves) (1904, p. 433) 

 the name S. natans L. is still used and made synonymous with affine. 

 The latest Swedish Flora (Lindman, pp. 43-44; 1918) regards 

 S. natans L. as in part S. affine, and restricts S. natans L. to 

 S. Friesii Beurhng. Neuman (Sveriges Flora, 808; 1901) has 8. 

 natans (L.) Fr. ; while in his account of the genus in Hartman's 

 Handb. Sk. Fl. 1889 he has " S. natans L. Sp. PI. ed. 2. 1763 ? E. 

 Fr. Summ. 1849 = S. Friesii Beurl. Bot. Not. 136 (1854)." It seems 

 that for our plant we must use Michaux's name affiue. — A. Bennett. 



REVIEWS. 

 Two Text-Books. 



A Text-book of Botany for Medical and Pharmaceutical Students. 

 By James Small, D.Sc, F.L.S. 8vo, pp. x, 681, with 1350 

 illustrations. Churchill, London, 1921. Price 25s. 



The Elements of Vegetable Histology. By C. W. Ballard. 8vo, 

 pp. xiv, 246, with 75 text-figures. Willey, New York ; Chap- 

 man & Hall, London ; 1921. Price 17.9. Qd. 



Each of these volumes has been prepared to meet the needs of a 

 special class of student hy a teacher who has had special experience. 

 Prof. Small, of the Queen's University, Belfast, was until recently 

 Lecturer in Botany to the Pharmaceutical Society of Great Britain ; 

 and Mr. C. W. Ballard is Associate Professor of Materia Medica and 

 Director of the Microscopical Laboratory, College of Pharmacy, 

 Columbia University. Each author should therefore be in a position 

 to judge of the needs of the students for whom he is writing. 



Professor Small's text-book has grown out of the late Prof. Rey- 

 nolds Green's Manual of Botany, which in turn replaced the earlier 

 work by Prof. Bentley. The excellent figures, especially those 

 illustrating the external morphology of the flower and fruit, were an 

 important feature of the two earlier works, and these have been 

 retained in the present volume with additions from various sources 

 and some original. At a rough estimate the figures occupy half the 

 space of the volume, and into the other half Prof. Small has got 



