^5 NATURAL HISTORY BULLETIN. 



Rabenhorst- Winter, Fungi Europgei 3216, on Tetradymia 

 ranescens. 



Also reported on Aplopappus spiiuilosiis DC. 

 Calif., Mont., Nev., Utah. 



17. PucciNiA iioLBCELLii Rostr. (1888. Fungi Groenl., p. 



534-) 



17a. On Arabis arcuata Gray. King's River Canon, 



Calif., Hohvay. 



17b. Same, with germinating teleutospores. 



Orig. descr. "51, Piicchi'ia I/oll>a'Uii Rostr. ^Ecidliiiii IloUxvllii Horn. ¥\. 

 Dan. t. 2220. 



Paa Blade af ^irabis Ilolbocllil: Ameralik, Vahl; Stivek, Warniing^ 

 and Holm; Majorkak, i. s. Isortok, S. Hansen. 



Svampen blev forste gang beskrevet i 1836 af Ilornemann i Fi. 

 Dan. som ^cidium; men de i Bot. Mus. opbevarede E.xpl. \ise at 

 det er en Puccinia, af Gruppen Leptopuccinia, som endog ganske 

 mangle ./E^cidier. Alle Blade paa de angrebne Vaertplanter ere 

 belt bedtekkede paa Undersiden med de regel'maessig halvkug- 

 leformede, rodbrune Puder af Teleutosporer. Disse ere glatte, tykt 

 Kolleformede, med afrundet fortvkket Ende, 35-38// 1. 15-20// t.: 

 Stilken, lang og farvelos, yo-Soa 1. 6// t. 



Mange Teleutosporer vare spirede og det ovre Rum fik da et eien- 

 dommeligt Udseende, som mindede om P. coronaia idet der danne- 

 des 2-4 korte vorteformede Flige i Spidsen. Den blev i 18S5 

 funden af E. Warming i Finmarken paa Ervsiiiiiiiii IiuracifoUum (se 

 Bot. Tidskr. 15 Bd. S. 236.) Maaske synonym med /'. thJaspcos 

 Schub., som dog er et vngre Navn. 



TRANSLATION. 



"This fungus was first described in 1836 by Ilornemann in FL 

 Dan, as an ^Ecidium, but the specimens preserved in the Botanical 

 Museum show that it is a Puccinia of the group Leptopuccinia^ 

 entirely without an ^^cidium. .\ll the leaves of the affected host- 

 plants are thicklj' covered on the unders-ide with tlie regular,, 

 pulvinate, red-brown sori of teleutospores. These are smooth, 

 stoutly clavate, with rounded thickened apices-35-38// by 15-20//; 

 pedicels long, and hyaline, 7o-So/i by 6;/. Many teleutospores had 

 germinated and the upper cell acquires then a peculiar appearance 

 reminding one somewhat of P. coronaia, since 2-4 short wart- 

 shaped corners are formed at the apex. It was found in 1885 by 

 E. Warming in Finland on Eryslniuin hicracifoUiim (see Bot. Tidskr. 

 15 Bde. S. 236). Perhaps a sjnonym of Puccinia f/ilasprna Schub.,. 

 which is a still more recent name." 



