626 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Cup-shaped extra-nuptial nectaries occur at the serrated tips of the 

 leaves, and food-bodies, which may contain proteid material, are found 

 on the inner protected surface of the stipules. There is, however, no 

 evidence that the presence of the ants is in any way an advantage to the 

 plant. 



Monograph of the Genus Cardamine.* — 0. E. Schulz gives a 

 general account of the morphology of the genus, followed by a discus- 

 sion of its affinities, geographical distribution, and the hypothetical 

 origin of its subdivisions. The larger part of the paper is occupied 

 by a systematic account of the genus and its species, with full descrip- 

 tions and notes on distribution. 



African Flora.f — The continuation of this work under the editorship 

 of Dr. Engler comprises mainly a description of new genera and species 

 in the following orders of seed-plants : — Capparidaceas and Ochnacea3 

 (by E. Gilg), Euphorbiaceaa (by F. Pax), Verbenacese and Malvaceae 

 (by M. Giirke), Tiliaceaa, Sterculiaceas, Apocynacea?,, Asclepiadaceas, 

 Bignoniacese, Bubiaceas, and Commelinaceae (by K. Schumann), and 

 Myristicaceae (by 0. Warburg). 



Flora of Ferro.J — I. Bornmiiller describes a new' species of Senecio 

 (S. Murrayi) from the island and gives a brief general account of the 

 flora of this small member of the Canary group, and " the most western 

 point of the old world." 



Bermuda Islands.§ — A. E. Verrill gives an account of the character 

 and origin of the original flora of the islands, as far as is possible from 

 available information, and discusses the destructive effect upon it of the 

 wild hogs (before 1612) and of the plague of wood-rats (1614-18). 

 Drouths and the extensive deforesting of the islands by the earlier 

 settlers also had a prejudicial effect on the native vegetation. The 

 author gives an interesting historical account of the principal trees — the 

 Bermuda palmetto, cedar and yellow-wood, and a list of the more 

 important introduced plants including weeds. 



Mexican Leguminosa3.|| — M. Micheli has given a systematic account 

 of the members of this family collected by Eugene Langlasse in the 

 States of Michoacan and Guerrero. A new genus, Goldmannia (Mimosea) 

 and a large number of new species are described, and illustrated in 

 excellent quarto plates. 



Amazon Flora. If — T. Huber gives a botanical account of the rubber- 

 yielding plants of this region, and describes two new species, Hevea 

 viridis and Sapium Marmieri. 



The same author ** supplies a systematic list, with descriptions of 

 new species, of the ferns and flowering plants collected or observed in 



* Engler. Bot. Jahrb., xxxii. (1903) pp. 280-416. 



t Op. cit., xxxiii. (1903) pp. 209-384. J Tom. cit., Beibl. 72, pp. 1-14. 



§ 'The Bermuda Islands.' Trans. Connect. Acad. Arts, and Sci., xi. (.1902) 

 pp. 413-95G (40 pis. and rigs, in text). ' Changes in the Flora due to Man,' pp. 571- 

 658. 



|| Mem. Soc. Physiq. et Hist. Nat. Geneve, xxxiv. (1903) pp. 243-94 (28 pis.). 



f Bolet. Mus. Para., iii. (1902) pp. 345-69. 

 ** Op. cit, pp. 490-8 (map and 4 pis.). 



