Arthur: Uredinales Collected in Trinidad 21 



referred to the genus Prospodium. The paraphyses are notable 

 for their scimitar shape, sharp points, and cross walls. It has been 

 reported on Pyrostegia venusta, as well as on the type genus. 



59. Uredo Commelynae Kalchbr. Grevillea 11 : 24. 1882 

 On Commelina elcgans H. B. K., 3390. 



60. Uredo Cyathulae Mayor, Mem. Soc. Neuch. 5: 584. 1913 

 On Cy at hula achyranthoides (H. B. K.) Moq., 3334. 



61. Uredo maculans Pat. & Gaill. Bull. Soc. Myc. Fr. 4: 98. 



1888 



On Pfaffia iresinoides (H. B. K.) Kuntze, 30/6, 3250, 3303. 



62. Uredo Mandevillae Mayor, Mem. Soc. Neuch. 5 : 591. 191 3 

 On Mandevilla foment osa (Vahl) Kuntze, 3258, 3285, 3297. 



63. Uredo rubescens Arth. Mycologia 7: 327. 1915 

 On Dorstenia Contrajerva L., 3078, 3475. 



64. Uredo Trichiliae Arth. Mycologia 9: 90. 1917 

 On Trichilia trinitensis A. Juss., 3305, 3421. 



65. Uredo vicina Arth. Mycologia 7: 325. 1915 

 On Wedclia Jacquini Rich., 3432. 



66. Uredo Viticis Juel, Bih. K. Sv. Vet.-Akad. Handl. 23.(3) 10 : 



26. 1897 



On Vitex sp., 3293. 



67. Aecidium Alibertiae sp. nov. 



0. Pycnia epiphyllous, numerous in circular groups on discol- 

 ored spots 4-10 mm. across, prominent, subepidermal but appear- 

 ing subcuticular, flattened-conic, large, 160-210/x in diameter, 65- 

 80 /a. high ; hymenium flat ; ostiolar filaments wanting. 



1. Aecia hypophyllous, opposite the pycnia, short-cylindric, 0.3- 

 0.4 mm. in diameter, deep-seated, extending half way through the 

 leaf ; peridium colorless, the margin coarsely lacerate, fragile ; 

 peridial cells in front view angularly ellipsoid or oblong, in side 

 view lanceolate, strongly overlapping, 16-20 by 30-40^, the outer 

 wall thin, 1-2 /x, smooth, the inner wall thicker, 2-5 moderately 



