226 SCIENCE PROGRESS 



between 1846 and 1893. Two species, viz. Nostoc muscorum 

 and Nodularia Harveyana, resumed their activity after a period 

 of seventy years. Other highly resistant species belonged to 

 the genera Anabcena, Cylindrospermum, Chlorococcum, Tro- 

 chiscia, Stichococcus, Nitzschia, Plectonema, Hapalosiphon, and 

 Phormidium. The water content of the soil appears to affect 

 the retention of vitality, the greatest number of species being 

 obtained from a sample with 12 per cent, of water. 



Anatomy. — The anatomy of the stem in the Berberidacece 

 receives treatment at the hands of Prof. Harvey-Gibson and 

 Miss Horsman {Trans. Roy. Soc, Edinburgh). These authors 

 record the occurrence of two rings of vascular bundles in the 

 overground stem of Epimedium alpinum and of irregularly 

 scattered bundles in Achlys triphylla, Podophyllum spp., and 

 Diphylleia cymosa. Except for the presence of a cambium, the 

 vascular anatomy closely resembles that of Monocotyledonous 

 stems. In Akebia there is a well-marked endodermis. 



C. E. Quinlan, writing in the same journal, treats of the 

 anatomy of the Calycanthacese. All the species examined 

 showed pairs of basipetal axillary buds, and four inversely 

 orientated bundles in the pericycle. Several species exhibited 

 thyloses and also lateral sieve plates. 



Morphology. — M. Tison has recently described {Rev. gin. 

 d. Bot.) the remarkable suspensor of Trapa natans. This is a 

 robust structure which assists in the nutrition of the embryo 

 and is furnished with a well-developed, tongue-like haustoriurm 



Taxonomy. — E. G. Baker {Jour. Bot., June and July) has 

 recently furnished a clavis to the African species of Allophylus 

 {Sapindacece), and also descriptions of fourteen additions to 

 the genus. In the same journal Mr. A. More describes a new 

 species of Phyllanthus. 



Mr. Pugsley, in the Journal of the Linnean Society for May, 

 contributes an exhaustive revision of the genera Fumaria 

 and Rupicapnos, including diagnoses of six additions to the 

 former and seven to the latter, together with several new 

 varieties. The same author, in an article on the British 

 Euphrasias {Jour. Bot.), describes a new species from Exmoor 

 under the name E. confusa. This is closely allied to E. gracilis 

 and E. nemorosa, but is distinguished by its yellow flowers and 

 broad emarginate capsules. 



The hybrid between Papaver rhceas and P. dubium is de- 



