113 



Providence, R. I., by Professor W. W. Bailey, (BULLETIN, vi. 

 312), ?ind {or A. fruticosa by C. A. Meyer {fide Masters, Veg. 

 Teretology, 192), but the complete change from the monoecious 

 to the dioecious condition in the genus does not appear to have 

 been mentioned, and Is of but infrequent occurrence, though 

 known in Jiiglans and Morus. — Ed.] 



Reviews of Foreign Literatu 



^/ 



By Harry Bohts, F.L.S. 



N. L. B. 



(Trans. South African Phllos. Soc. v. part i, pp. 200, with ^6 

 plates, partly colored, Cape Town, 1888.) The South African 

 Flora must afford a rich field of study for those interested in 

 orchids, and who is not ? for out of some 1,750 flowering 

 plants, 102, or 5.8 percent, are of this order.. 



This is indeed a remakable proportion, and as shown by Mr. 

 Bolus in his interesting preface, is probably not surpassed by any 

 region of equal area (197 square miles) in the same latitude. 

 They are included in but ten genera, however. Of the five tribes 

 of the order the Neottieae and Cypripedleae are not represented. 

 The monograph is very complete, and is ornamented by ex- 

 tremely good plates executed after drawings by the author, 

 mainly from living plants. 



Studies OH the TilopteridecB. In the recent numbers of the Bot 

 Zeitung (Numbers 7, 8, 9, of 1889), Prof J. Reinke describes 

 several genera of the Tilopterideae. This family includes a small 

 number of small marine-algai and is of interest chiefly owing to the 

 question of its supposed place in the system. After the usual 

 exhaustive historical sketch and another concerning its geograph- 

 ical distribution, he gives a description of three species represent- 



mg as many genera. 



The first, Haplospora globosa, Kjellm, is a small alga growing 

 in tufts of from 2-10 centimetres in height, these being fastened 

 on small stones or shells, rarely on larger algse. These tufts 

 of brownish-yellow color consist of numerous single plants re- 

 sembling Sphacelaria In general form and Ectocarpus in their man- 

 ner of branching. The part of the plant growing up from the 

 rhizoid-like cells which serve to fasten it to the stone or shell, 



