90 REVIEWS. 



Albizzia Lebbek, and Berkeley's determiiialion of tJie fungus was 

 correct, though the host plant was wronglj' identified. Finally, 

 R. stictica, Berk. & Br., has been the source of some confusion, 

 and Dietel takes the shortest way out of the difficulty by substitu- 

 ting the names R. Hobsoni, Cooke, and R. Mundulece, Henn., for 

 the two species which Berkeley included under that name. 



In his " Fimgi of Cejdon," Berkeley cited R. indica on Bauhinia 

 tomentosa and Cassia absus (Thwaites 517). Dietel qTieries the 

 first host plant, and states that he has not seen a specimen. In 

 the Peradeniya herbarium, R. indica on Cassia absus is Thwaites 

 517 ; and Thwaites 519 which was collected at the same time and 

 place is Uromyces verruculosa, B. & Br., on Bauhinia tomentosa. 

 Probably the original record is due merely to a confusion of the 

 numbers. 



Berkeley's original specunens of R. stictica, B. & Br., included 

 two host plants, Pongamia glabra. Vent., and Mundulea suberosa 

 (DC), Benth. The former is Thwaites 493, and the latter Thwaites 

 501. Parts of both these type specimens of R. stictica are in the 

 Peradeniya herbariiun. Cooke made a distinction, describing 

 R. Hobsoni, Cooke, on some undetermined leaf, and R. stictica, 

 B. & Br . , on Pongamia. But an examination of Cooke's type speci- 

 men of R. Hobsoni has convinced Dietel that it is on Pongamia, 

 and is identical with the fungus Cooke separated as R. stictica, 

 B. & Br., on Pongamia. The leaves of the original two host plants 

 cannot be confused. It appears from this that Cooke's separation 

 concerned the fungus on one host only and was incorrect. Un- 

 fortunately, however, Cooke's figure 7 which he calls stictica is. 

 according to Dietel, the species on Mundidea suberosa. Since 

 then Hennings has described the latter as R. Mundulece. Cooke's 

 determination thus rests upon neither his figtu'e, nor his type 

 specimens, and it may be questioned whether the facts warrant 

 the suppression of Berkeley's name R. stictica in favour of R. 

 Hobsoni for the species on Pongamia glabra. 



T. P. 



Course of Laticiferous Tubes in Leaves. 



[Beitrage fiber den Verlauf der Milchrohren in den Blattern. 

 Oscar Mayus. Beihefte zum Botanischen Centralblatt. Bd. 

 XVIII., Abt. I., Heft 2, pp. 273-286.] 



The author has investigated the course of the laticiferous tubes 

 in the leaves of fourteen species. These are chieflj^ European, 

 but they inclvide the members of the families to which our rubber- 

 producing plants belong. He states that the laticiferous tubes 

 accompany the sieve tubes into the side nerves of the second 

 order, but that in the majority of cases they then replace the 

 sieve tubes and pass through the spongy tissue of the leaf coming 

 in direct contact Avith the assimilating cells. In Ficus elastica 

 and Euphorbia peplus they pass between the cells of the palisade 



