ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 201 



The best represented orders are Leguminosae, with 22 genera and 

 76 species; Compositffi, with 25 and 74; and Grasses, with 19 and 

 35. There is a greater affinity with the Tasmanian Alpine flora 

 than with that of any other region. Notes are given on the more 

 interesting plants in the different natural orders, and also a census of all 

 the plants known, including Cryptogams. 



Fries, Th. M. — Svenska Vaxtnamn. (Swedish plant-names.) 



[An annotated list of popular names of plants, with their Latin equivalents. 

 Keferencesto literature are given.] 



" Arhiv f. Botanik, iii. No. 13 (1904) pp. 28-60. 



Malme, G. O. — Die TTmbelliferen der zweiten Regnell'schen Eeise. (The Umbel - 

 liferss of the second Regnell expedition.) 



[A systematic account of the plants of this order collected on this Brazilian 

 expedition. The family is represented in Brazil chiefly by the genera 

 Hydrocotyle and L'ryngium, which include 6 and 20 respectively of the 31 

 species collected. Four new species and two new varieties of Eryngium 

 are described.] Tom. tit. pp. 1-22 (3 pis.). 



Merino, R. P. — Contribucion a la Flora de Galicia. Supplement IV. [Fourth 

 supplement to the Flora of Galicia.) 



[A systematic list of ferns and seed-plants, with critical notes and descriptions 

 of new species of Erica, Linaria, and Sagina respectively.] 



Mem. d. 1. Soc. Espan. Hid. Nat, ii. (1904) pp. 455-516. 



Townsenc, F. — Flora of Hampshire, including the Isle of Wight. 

 [New edition, with numerous additions.] 



Lovell Reeve (1904) xxxviii. and 658 pp., 2 pis. and map. 



CRYPTOGAMS. 



Pteridophyta. 

 (By A. Gepp, M.A., F.L.S.) 



Anatomy of Psilotum triquetrum.*— S. O. Ford gives a detailed 

 account of the anatomy of this plant. It consists of a much-branched 

 aerial stem and rhizome. The leaves are much reduced, and have no 

 vascular supply. There are no roots. The plant is monostelic through- 

 out. At the base of the aerial stem a protostele is found, and this, 

 higher up, may be succeeded by a medullated stage with no inner 

 phloem or endodermis. Secondary tracheids may occur. In the 

 aerial branches a central core of sclerenchymatous fibres is found, 

 surrounded by xylem with radiating groups of protoxylem. In the 

 rhizome the xylem forms an irregular mass with no fibres, and the 

 protoxylem consists of ordinary scalariform tracheids. The phloem 

 throughout is feebly developed, and lignification of this tissue may 

 occur in the aerial stem. A three-sided apical cell is present both in the 

 aerial stem and in the rhizome. From the nature of the sporangia! 

 apparatus the Psilotaceas have been regarded as possessing a close affinity 

 with the fossil Sphenophyllales. There is also a strong resemblance, 

 anatomically, to some of the fossil Lycopods, especially to the stem of 

 Lepidodrendron mundum, as well as to the axis of the cone of Lepido- 

 strobus Broiviui. 



* Ann. Bot., xviii. (1904) pp. 589-605 (1 pi.). 

 April 19th, 1905 p 



