284 Palaeontologie. — Pharmacologie. 



growth in the latter. The author finds that the large Spaces or 

 sacs which Ied Seward to regard the phloem-zone as „secre- 

 tory", are due to imperfect preservation. There seems to be no 

 evidence for the presence of such secretory tissue in the stelar 

 region, though true iysigenous glands are known to occur in 

 the outer cortex. The author suggests that the frequently defec- 

 iive preservation of the phloem in Lepidodendreae may have been 

 due to an amyloid modification of the cell-walls, as in the 

 phloem of recent Lycopods. D. H. Scott (Kew). 



SEWARD, A.C., On the so -called Phloem oiLepldodendron. 

 (The New Phytologist. Vol. I. p. 38—46. Text-figs. 1 & 2. 

 London, February 1902.) 



The author discusses the structure of the stele of Lepido- 

 dendreae and replies to Professor Weiss's paper, basing his 

 statements on specimens of Lepldodendron (Lepldophloios) 

 fuliginosum and L. Wunschianum. He agrees with Weiss as 

 to the probable phloem-function of the tissue in question, but 

 not as to its phloem-structure, stating that we have no satis- 

 factory evidence of the sieve-tube nature of any of the elements 

 in the tissue described as phloem. This tissue „may or may 

 not have had a secretory function". The author lays stress on 

 the statement that recent observers have not always been in 

 agreement as to the exact position of the tissue regarded as 

 phloem. The author has so far failed to discover any evi- 

 dence for the existence of secondary phloem in Lepidodendroid 

 stems, and he further points out that in these plants the cam- 

 bium was represented by abroad zone of meristematic tissue. His 

 conclusious are: „(1.) Lepldodendron did not posses a cambium- 

 layer of the same type as that of most recent plants. (2.) 

 The tissue, which from its position migt be designated phloem, 

 did not exhibit the characters usually met with in that tissue. 

 (3.) The formation of secondary stelar tissue was chiefly, if not 

 «ntirely, confined to the secondary xylem." 



D. H. Scott (Kew). 



Mitlacher, Wilhelm, Die zur Neuaufnahme in die achte 

 Ausgabe der österreichischen Pharmacopoe in 

 Aussicht genommenen Drogen aus der Gruppe 

 der Herbae und Folia. (Pharmaceutische Post. Jahrgang 

 XXXV. 4°. Wien 1902. No. 21. p. 305—308. No. 22. 

 p. 321—323. No. 23. p. 337—338. No. 24. p. 349—350. 

 No. 25. p. 361— 362. No. 26. p. 377— 379. No. 27. p. 393 

 —398. No. 28. p. 409—410. Quart. Mit zahlreichen ana- 

 tomischen Textabbildungen von der Hand des Verf.) 



Die staatliche österreichische Pharmacopoe-Commission hat zur 

 Neuaufnahme in die Pharmacopoe folgende Herbae und Folia vorge- 

 schlagen: HerbaEquiseti, Herba Convallariae majalis,Herba 

 Adonis vernalis, Herba Polygoni avicularis, Herba Majo- 

 ranae, Folia Farfarae, Folia Hamamelidis, Folia Jaborandi 



