586 Pteridophyten. — Floristik etc. 



bearing large, almost vertical, pinnate leaves. The prothallus is 

 large, rather thick and longlived, bearing antheridia on both surfaces 

 and archegonia on the lower side only; it multiplies by means of 

 adventitious buds and appears also sometimes to dichotomize. The 

 embryo has a large suspensor elongating laterally, the exact origin 

 of which was not traced. The author interprets the vascular System 

 of the young -porophyte as at first consisting of leaftraces only and 

 believes that the central vascular Strand or "stele" found at the 

 base and in the middle of older sporophytes "is the result simply 

 of the fusion of independent leaftraces", though he admits that it 

 is likely that truly cauline bundles make their appearance later on. 

 In the older sporophytes there is a Single large, somewhat cres- 

 centic bündle and four smaller bundles, apparently a pair of double 

 leaf-traces. The sorus is longer than in any of the Marattiaceae, 

 except Archangiopteris, it is partially submerged, and the sporangia 

 are so crowded as to resemble a synangium; the annulus is repre- 

 sented by a Single, transverse row of almost unthickened cells. 



It is thought that among Marattiaceae, Macroglossum comes 

 nearest to Archangiopteris and Angiopteris, but especially to the latter. 

 A. Smithii Raciborski undoubtedly belongs to this genus and should 

 be termed Macroglossum Smithii; it comes nearer to Angiopteris 

 than M. Alidae, having shorter sori and a somewhat better developed 

 annulus In one or two points it resembles Danaea: e. g. in the pre- 

 sence of a suspensor. Isabel Browne (London). 



Baker, R. T., Descriptions of three newspecies oi Myr- 

 taceae. (Proc. Linn. Soc. New South Wales. XXXVIII. 4. p. 596— 

 602. 2 pl. 1914.) 



The two species of Melaleuca described, have, in the past, been 

 regarded as M. Leucadendron or as forms of it, though it is doubtful 

 if the tree M. Leucadendron really occurs in Australia. The new 

 names proposed for these plants are M. Maideni and M. Smithi. 

 Angophora ochrophylla a third new species is also proposed. The 

 exact localities in Queensland and New South Wales are 

 given. It is said that the bright yellow or pale colour of the leaves 

 is probably due to myrtiflorin. As to the essential oil, it resembles 

 that obtained from other species of Angophora, the yield from ter 

 minal branches and leaves being OlSO/g. E. M. Jesson (Kew). 



Tansley, A. G., International Phy togeographic Excursion 

 (I. P. E.) in America, 1913. (New Phyt. XII. p. 322—336; XIII. 

 p. 30-41; p. 83-92; p. 268-275; p. 325-333. 1913—14.) 



This excursion in August and September 1913 was so compre- 

 hensive that few of the larger features of the Vegetation of the 

 United States were omitted, and it is noteworthy that as a rule 

 the demonstraiions at each centre were conducted b}'^ American 

 ecologists who had made a special study of that area. No attempt 

 is made to describe everything seen , but the notes are fairly 

 exhaustive in places, and the matter is so arranged that the reader 

 can follow with a personal interest the daily progress of the excur- 

 sion. Special attention is given to geographical and edaphic factors, 

 and to the dominant and characteristic species of the various plant 

 communities. Onl}' a brief indication of some centres visited is pos. 



