202 SUMMARY OF OUEEENT RESEARCHES RELATING TO 



Prothallium of Ophioglossum vulgatum.* — H. Bruchmann has 

 succeeded in finding the long-sought gametophyte of 0. vulgatum, and 

 describes in detail and with many figures the external and internal 

 structure of the prothallium and young sporophyte. The prothallium 

 shows a radial structure, and agrees in the main with that of O.peduncu- 

 losum and 0. pendulum. It yet remains to cultivate the spores, so that 

 the earliest stages of the prothallium may be obtained. Incidentally he 

 describes the cutting of a lenticular cell (first rhizoid cell) from the basal 

 cell of the infant prothallium in several European species of Lycopodium. 



Polystichum.f — A. Somerville treats of the three British species of this 

 genus : — P. Lonchitis, P. acideatum, P. angidare, with special reference 

 to this last, the distribution of which in Scotland (where it is becoming 

 increasingly rare) he describes. P. lobatum he suppresses, stating his 

 reasons for regarding it as an immature form of P. acideatum. He indi- 

 cates several points of distinction between P. acideatum and P. angular e. 



Battandier et Trabut — Flore Analytique et Synoptique de l'Algerie et de la 

 Tunisie. (Analytic and synoptic flora of Algeria and Tunis.) 



[Contains on pp. 401-8 the Pteridophyta, with descriptions and keys.] 



Paris : Klincksieck (1904) 400 pp. 



Bernstiel, O. — Scolopendrium officinarum f. undulatum. 



Gartenwelt, ix. (1004) pp. 121-2. 



Boodle, L. A. — The structure of the leaves of the Bracken (Pteris Aquilina Linn.) 

 in relation to environment. Journ. Linn. Soc. (Bot.) xxxv. (1904) pp. 659-70. 



Botjygtjes — Sur Interpretation anatomique des cordons liberaux ligneux du Pteris 

 Aquilina. (On the anatomical interpretation of the wood-bast fibres of P. Aquilina.) 



Act. Soc. Linn. Bordeaux, lviii. (1903) p. 76. 



Br aim, J. — Osmunda regalis at Goathland. Naturalist, 1904, p. 378. 



Brenzinger, C. — Flora des Amtsbezirks Buchen. (Flora of the district of Buchen.) 



Mitt. Bad. Bot. Ver., 1904, p. 385-416. 



Campbell, D. H. — The Affinities of the Ophioglossacese and Marsiliaceae. 



Amer. Naturalist, xxxviii. (1904) pp. 761-75 (figs, iu text). 



Chifflot, J. — Sur un cas rare d'heterotaxie de l'epi diodangifere de l'Equisetum 

 maximum Lam. et sur les causes de sa production. (On a rare case of heterotaxy 

 of the diodangiferous spike of E. maximum and the causes of its production.) 



Note pres. a la Soc. Linn. Lyon, 1904, 5 pp. ; 

 Hedwigia, xliv. (1905) Beibl., p. 82. 



Christ, H. — Primitiae Florae Costaricensis. Filices et Lycopodiaceae. (First-fruits 

 of the flora of Costa Rica. Ferns and Lycopodiaceae.) 



[Continuation.] Bull. Herb. Boiss., v. (1905) pp. 1-16. 



„ „ Quelques remarques concernant une collection de Fougeres du Bhotan 

 recoltees par "W. Griffith et acquise par l'Herbier Delessert en 

 1856. (Some remarks upon a collection of ferns of Bbotan collected 

 by Griffith and acquired by Herbier Delessert in 1856.) 



Ann. Conserv. Jard. bot. Geneve, vii.-viii. (1904) pp. 330-32. 



Clute, W. N. — Adiantum Capillus- veneris in Pennsylvania? 



[A plea for investigation of reported occurrences of the species.] 



Fern Bulletin, xii. (1904) pp. 121-2. 



* Bot. Zeit., lxii. (1904) pp. 227-48 (2 pis.). 



t Trans. Proc. Bot. Soc. Edinburgh, xxii. (1904) pp. 312-17. 



