Arthur: Uredinales of Costa Rica 



133 



64. Puccinia crassipes Berk. & Curt, (on Convolvulaceae) 

 Ipomoea purga Hayne, Orotina, Dec. 30, 1915, I, III, 325; San 

 Jose, Jan. 8, 1916, I, 392; Heredia, Jan. 23, 1916, I, 456. 

 The rust was also collected at a small railway station about 

 fifty miles west of Limon, on /. trifida (H.B.K.) G. Don, by E. 

 Bethel, March, 191 3, showing aecia only. The species is common 

 in tropical America. 



65. Puccinia Lantanae Farl. (on Verbenaceae) 

 Lantana Camara L., San Jose, Dec. 27, 1915, 303 ; same, Jan. 3, 

 1916, 352. 



Lantana hispida H.B.K. , San Jose, Dec. 10, 1915, 244; Cartago, 



Dec. 22, 1915, 2/8. 

 Lantana sp., Orotina, Dec. 31, 191 5, 338. 



A short-cycle rust common in the warmer parts of America. 



66. Puccinia elatipes Arthur & Holway sp. nov. (on 

 Verbenaceae) 



Lippia sp., hills southwest of San Jose, Dec. 27, 191 5, II, III, 

 307. 



Pycnia epiphyllous, few, crowded on discolored spots, 1— 1.5 

 mm. across, conspicuous, subepidermal, cinnamon-brown or 

 darker, flattened conical, 190-238^ broad by 74-144 /x high. 



Uredinia amphigenous, crowded on spots with the pycnia, 

 round or oval, 0.2-0.4 mm. across, early naked, pulverulent, cin- 

 namon-brown, ruptured epidermis inconspicuous ; urediniospores 

 obovoid, usually flattened above and on the pore-bearing sides, 

 so that when seen with pores in optical section appearing obovoid- 

 triangular, 23-25 by 26-29/*, in obovoid view, and 26-29 by 26- 

 29 ft in triangular view; wall cinnamon-brown, 1.5 ^ thick, rather 

 sparsely and strongly echinulate, the pores 2, approximately 

 equatorial. 



Telia hypophyllous or somewhat amphigenous, scattered, 

 round, 0.1-0.5 mm. across, early naked, pulvinate, chestnut- 

 brown, ruptured epidermis inconspicuous ; teliospores ellipsoid, 

 23-26 by 39-42 /x, rounded at both ends, moderately constricted 

 at the septum; wall cinnamon-brown, thin, 1 fx, thickened by a 

 colorless umbo at the apex, 3-4 /x, smooth ; pedicel colorless, 

 cylindric or fusiform-cylindric, 18-24 by 100—150^,. the wall thin. 



