142 



Mycologia 



91. Puccinia Conoclini Seym, (on Carduaceae) 



Eupatorium pycnocephalum Less., San Jose, Jan. 11, 1916, II, III, 

 409. 



Eupatorium Sinclairi Benth., Heredia, Dec. 17, 1915, II, 263; 



Orotina, Dec. 30, 1915, II, 329; trail to Volcan de Poas, Jan. 



5, 1916, II, III, 375. 

 A widespread species of tropical and temperate North Amer- 

 ica, whose initial stage is unknown. 



92. Puccinia inermis Jackson & Holway sp. nov. (on 

 Carduaceae) 



Eupatorium sp., El Alto near Cartago, Jan. 16, 1916, II, iii, 434A. 



Uredinia hypophyllous, few, scattered, round, small, 0.2-0.4 

 mm. in diameter, early naked, dark cinnamon-brown, pulverulent, 

 ruptured epidermis conspicuous ; urediniospores greatly com- 

 pressed laterally, somewhat flattened beneath, appearing some- 

 what reniform seen from the side with pores in optical section, 

 30-34//, in greatest breadth from pore to pore, 24-26 /a broad at 

 right angles, 23-26 fi long from hilum to apex ; wall cinnamon- 

 brown, 1— 1.5/* thick, finely and moderately echinulate, the pores 

 2, equatorial at the broadest part. 



Telia in the uredinia broadly ellipsoid, 24-26 by 31-37^, 

 rounded at both ends, somewhat constricted at septum.; wall 

 chestnut-brown, uniformly 1.5-2 /x thick, the pore of lower cell 

 usually about half way between septum and pedicel ; pedicel color- 

 less, as long as spore, fragile, usually broken off near the spore. 



The general characters of both the urediniospores and telio- 

 spores are similar to those of the two Mexican species on Eupa- 

 torium, P. inanipes and P. espinosarum, but not identical. 



93. Puccinia Spegazzinii DeT. (on Carduaceae) 

 Mikania scandens (L.) Willd., Orotina, Dec. 30, 1915, 330; San 

 Jose, Jan. 8, 1916, 394. 

 A common, short-cycle species of tropical America. 



94. Puccinia doloris Speg. (on Carduaceae) 



Erigeron sp., San Jose, Jan. 10, 1916, 401. 



A short-cycle species described from Argentina, S. A., and now 

 reported from North America for the first time. 



