PUCCINIA. 361 



p. thlaspeos Schub. On Thlaspi alpestre and Arabis hirsuta 



P. sperg^ulae D. C. On Spergula. (U.S. America.) 



P. arenariae (Schum.). On A Isineae and Sileneae, e.g. cultivated Dianthus 

 barbatus. (Britain and U.S. America.) 



P. chryosplenii Grev. On Chrysosplenium. (Britain.) 



P. circaeae Pers. On Circaea. (Britain and U.S. America.) 



P. buxi D. C. On Buxiis sempervirens. (Britain.) 



P. umbilici Giiep. On Umbilicus. (Britain.) 



P. valantiae Pers. On Oalium. (Britain and U.S. America.) 



P. asteris Duby. (Britain and U.S. America.) On Aster, Artemisia, 

 Achillea, Cirsium, Scabiosa, Doronicum. Plowright regards P. millefolii 

 Pekl. on Achillea as a distinct species. 



P. veronicae (Schroet.) (Britain). 



P. veronicarum 1). C. (Britain and U.S. America). [On Veronica.'^ 



P. albulensis Magn. 



P. glechomatis D. C. On Olechoma {Nepeta). (Britain and U.S. America.) 



P. annularis (Strauss). On Teacrium. (Britain.) 



■'■}' 



Hemileia. 



Hemileia vastatrix, Berk, et Br. This occurs on the leaves of the coffee 

 plant in Ceylon, Java, and Sumatra. It causes a very destructive disease. 

 Sadebeck recommends as remedies : (1) Removal of infected leaves and 

 their sterilization by dilute acids or Bordeaux mixture. (2) Spraying 

 the beds with Bordeaux mixture, so as to kill the spores which have 

 fallen there. 



Several genera which do not occur in Europe may be mentioned here, 

 viz. : Uropyxis, Diorchidium, Chrysospora, and Sphaerophragmium ; also 

 Masseella, Phakospora, and Schizospora.^ They contain but few species, 

 and none of practical importance. 



Triphragmium.* 



Teleutospores three-celled ; one cell is attached to the sporo- 

 phore, and carries the other two ; each cell has one or more 

 germ- pores. 



Triphragmium ulmariae (Schum.). (Britain.) Uredospores 

 and teleutospores produced on the same plant, Spiraea Ulmaria. 

 The teleutospore-patches are dark-brown, the uredo-sori reddish - 

 yellow, while the pycnidia (so-called spermogonia) are yellowish 



1 Distinction, see Magnus, Ber. d. deutsch. botan. Ges., 1890, p. 167. 

 ^ Sadebeck, Forstl-naturwiss. Zeitschrift, 1895. M. Ward, Sessional Papers^ 

 XVII., Colombo, 1881. 



^Dietel, Berichte d. deutsch. botan. Ges., 1895, p. 332. 



^Bibliography and Revision, by G. Massee, Grevillea, xxi., 1893, p. 111., 



