0)1 a New species of Mclanotaenium. Rudolph Beer. 343 



Rostriip, E — Ustilagincae Daniae. (Bot. Forenings Festskrift 



Kjobenhavn, pp. 1 17-168, 1890.) 

 Schellenberg, H. C. — Die Brandpilze der Schweiz, Bd. iii. Heft 



2, p. 108, 1911. 

 Schroeter, J. — Kryptogamenflora von Schlesien, in, i; Ustila- 



ginei, pp. 261-291, 1889. 

 Trail, J. W. H. — Two New British Ustilagineae. (Scott. Nat. 



VI, new ser. p. 243, 1884.) 

 Tulasne, L. R. — Fungi Hypogeae, p. 196. Paris, 1851. 

 Unger, F. — Die Exanthema der Ptianzen, 1833. 

 Wilson, M. — The Life History and Cytology of Tubercinia pri- 



mulicola Rost. (Brit. Assoc. Reports, Sect. K, 19 15.) 

 Werth, E., and Ludwig, R. — Ziir Sporenbildung bei Rost u. 



Brandpilze. (Bcr. d. deutsch. bot. Ges. Bd. xxx, 1912.) 

 Woronin, M. — Beitrag zur Kenntniss der Ustilagineen. (Ab- 



handl. d. Senk. naturf. Ges. Frankfort, Bd. xii, pp. 583- 



584, 1881.) 



EXPLANATION OF PLATE VHI 

 Fig. 



1. Rhizome of Lamium album with swellings caused by Me- 



lanotaenium Lamii. 



2. Mycelium forming pseudo-parenchymatous mass in an 



intercellular space of host plant, x 1000. 



3. Spores of M. Laww; one young, the other mature, x 1000, 



4. Very young spores of M . Lamii. x 1000. 



5. Haustorium of M. Lamii, partly enveloping host nucleus. 



x 1000. 



6. Dichotomously branched terminal branchlets of hausto- 



rium. X 1000. 



7. Young bi-nucleate spores of M. Lamii. x 1000. 



8. Bi-nucleate hypha of M . Lamii. x 1000. 



9. Mature uni-nucleate spore of M. Lamii. x 1000. 



10. Two haustoria of M. Lamii within a bi-nucleate cell of 



host plant, x 1000. 



11. Section of an intumescence upon a subterranean stem of 



Lamium album showing distribution of the spores of M. 

 Lamii within its tissues. From a microphotograph. 



