68 ' BOTANICAL GAZETTE [july 



tions of DiLLENius relate to "subjects so diverse as the investigation of the 

 British Flora, especially that of Wales; the botanical exploration of North Amer- 

 ica; the botany of the exotics, especially succulents, cultivated in his time; and 

 the classification of cryptogamic plants." The Dillenian herbaria are three: 

 that of the Synopsis; that of the Hortus EUhamensis; and that of the Historia 

 Muscorunu — J. M. C. 



Plant chemistry. — The original papers and addresses on plant chemistr}', pub- 

 lished by Helen C. DeS. Abbott Michael (6. 1857, d. 1904), have been col- 

 lected and reprinted, together with a biographical sketch (no pp.) and four 

 literary papers, to form a neat volume. ^ Mrs. Michael's scientific training was 

 obtained under extraordinary difl5.culties, and her work was made somewhat 

 scattering by reason of the very alertness and eagerness of her mind. Her con- 

 tributions to a knowledge of the constituents of plants, especially the glucosides, 

 are more valuable than her theories as to the correlation of plant form and clas- 

 sification with the nature and distribution of chemical compounds. The book in 

 its editing shows some unfamiliarity with scientific names and terms. It is a 

 worthy memorial to one whose work was cut short by an untimely death. — C.R.B- 



Flora of Guatemala. — John Donnell Smith has published as the eighth 

 part of his Emimeratio an index^ of the preceding parts. The species are arranged 

 alphabetically, and 7979 numbers are cited, representing 3736 species, 1189 of 

 which are not contained in Hemsley's Biologia Centrali- Americana. Incorrect 

 determinations and faulty nomenclature are also corrected. The author is to be 

 congratulated on the complete way in which he has investigated the flora of this 

 region and organized his results. — J. M. C. 



London botanic gardens. — M. Perred^s has brought together in a single 



publication^ a series of papers that appeared in ih^ American Journal 0} Pharmacy. 



The three gardens described are Kew Gardens, The Royal Botanic Society's 



Gardens in Regent's Park, and The Chelsea Physic Garden. The numerous 



admirable illustrations that accompany the text make these gardens very real to 

 the reader.— J. M. C. 



Pflanzenfamilien.^— Parts 227 and 228 contain the completion of the Lembo- 

 phyllaceae, and the presentation of Entodontaceae, Fabroniaceae, Pilotrichaceae, 

 Nematoceae, and Hookeriaceae, by V. F. Brotherus. The third part of the 



3 Michael, H. A., Studies in plant and organic chemistr\\ 8vo. pp. 423, Cam- 

 bridge:' The Riverside Press. 1907. $2. 50. 



•* Smith, John Donnell, Enumeratio plantarum Guatemalensium etc. Pars 

 yill. pp. 221. Oquawka, Illinois: H. N. Patterson. 1907. 



5 PERRiDEs, Pierre Elie Felix, London Botanic Gardens, pp. 100. pis, JI. 

 London: The Wellcome Chemical Research laboratories. 1907, 



^ Engler, a., und Prantl, K., Die natiirlichen Pflanzenfamilien. Lief. 227 und 

 228 und Erganzungsheft II, Lief. 3. Leipzig: Wilhelm Engelmann, 1907. 



