ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 79 



formation of foliage-leaves on the tendrils of the vine, and a forked 

 flower-spike in Plantago lanceolata var. altissima. 



0. V. Wennersten * describes, with illustrative figures, examples of 

 floral and also foliar teratology in specimens of the walnut grown in 

 Gothland. 



Abech avaleta, J. — Contribucion al conccimento de la Vegetacion del Uruguay. 

 (Contribution to our knowledge of the vegetation of Uruguay.) 



[Includes mainly grasses, with descriptions of new species of Stipa and 

 Aristida.'] Anales Mus. Nation. Montevideo, iv. (1903) 



pp. 61-86 (7 pis.). 

 „ „ Ncmina Vernacularia. (A list of vernacular names of the 



Uruguay flora.) 



Anales Mus. Nation, Montevideo, iv. (1903) pp. 132-52. 



Goldschmidt-Geisa, M. — Die flora des Rhongebirges III. (The flora of the 

 Rhongebirg.) 



[Comprises the grasses, with a few additions to the two previous parts.] 



Verhandl. Phys.-Med. Ges. Wurzburg, N.F. xxxv. (1903) pp. 313-35. 

 Johansson, K. — Archieracium-Floraninom Dilarnes Siluromrade I Siljanstrakten. 

 [A long paper on Hieracia, with notes on localities, etc., of previously known 

 species, and very full descriptions (in Latin) of many new ones.] 



Bihang K. S ensk. Vet.-Akad. Handl., xxviii. (1902) 

 Afd. iii. No. 7 (1902) pp. 1-156 (12 double plates). 

 Korbhinsky, S. — On the origin of the Peach. (Russian.) 



Bull. Acad. Imp. Sci. St. Pe'tersb., 8er. 5, xi v. (1901) pp. 77-83. 



„ On the original form of the Common Almond and allied species. 



Bull. Acad. Imp. Sci. St. i'e*ers6.,ser.5,xiv.(1901)pp. 85-94. 

 Nathorst, A. G. — Svenska Vaxtnamn. (Swedish plant-names.) 



Bihang K. Svensk. Vet.-Akad. Eandl., xxviii. (1902) 



Afd. iii. No. 9 pp. 1-72. 

 Sargent, C. S. — Recently recognised species of Crataegus in Eastern Canada and 

 New England, IV. and V. 



[Several new species are described in the two groups Coccinese and Tomentosx.~] 



Rhodora, v. (1903) pp. 159-68, 182-7. 



CRYPTOGAMS. 



Pteridophyta. 



Isoetes.f — G. H. Shull shows in a map the exact distribution of 

 Isoetes saccharata along the shores of the tributaries of Chesapeake bay, 

 and discusses various problems presented by it. It is confined to Chesa- 

 peake bay, and occurs but locally, on tidal beaches, requiring fresh or 

 slightly brackish water, and soil firm enough to resist wave-action. It 

 does not thrive where competition with other plants is great. Its dis- 

 persal is effected probably by water-currents, not by winds or birds. 

 A nearly related species, I. riparia, is similarly confined to the neigh- 

 bouring Delaware bay. There are grounds for concluding that the 

 former species is polymorphic, and for supposing that /. riparia may 

 prove to be an extreme form of it, some intermediate varieties being 

 untenable. The curious distribution finds an explanation in the geo- 

 logical alteration of the coast-line by upheaval and subsidence. 



* Bihang. K. Svensk. Vet.-Akad. Hand!., xxviii. (1902) pp. 1-12 (12 figs, in (ext). 

 t Bot. Gazette, xxxvi. (1903) pp. 187-202 (with map). 



