156 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
there appears no good reason for doubting the identity of the two 
rusts, and they are therefore here united under one name. These 
rusts were inadvertently placed by the senior author (Mycol. 9: 
83. 1917) under Puccinia cuticulosa Arth. (Uredo cuticulosa 
E. & E.), a Nicaraguan rust, recently found to be identical with 
Prospodium appendiculatum (Wint.) Arth. 
гот. Ргсстхтл RUELLIAE (Berk. & Br.) Lagerh. Tromsö Mus. 
Aarsh. 17: 71. 1805. 
ON ACANTHACEAE: 
Blechum Brownei (Sw.) Juss., Santiago de las Vegas, Feb. 
IO, 1916, II, III, Johnston 445. 
This species possesses all spore forms. It occurs also in Porto 
Rico, Martinique, and in Central and South America on the same 
host. Only uredinia have been seen on North American collec- 
tions on this host until the present collection came to hand, which 
gave a few telia. It is now evident that the rust, heretofore listed 
as P. Blechi Lagerh., is identical with that on Ruellia, and other 
hosts, often listed under the name P. lateripes Berk. & Rav. 
102. PUCCINIA LATERITIA Berk. & Сигё. Jour. Acad. Sci. Phila. 
2:281. 1853, 
ON RUBIACEAE: 
Borreria laevis (Lam.) Griseb., Baracoa (Prov. Oriente), 
April 15, 1916, Johnston 503. 
Hemidiodia ocimifolia (Willd. К. Schum., El Yunque, 
Baracoa (Prov. Oriente), March ro, 1903, Holway. 
The species is a short-cycle form without pycnia. It is a 
common rust of warm regions, and is known from other West 
Indian islands on the genera Diodia, Ernodia, Mitracarpum, and 
Spermacoce. It has been reported from Jamaica, Porto Rico, and 
the Bahamas. 
103. PucciniA ХАхтнп Schw. Schr. Nat. Ges. Leipzig 1: 73. 
1822. 
ON AMBROSIACEAE: 
Xanthium longirostre Wallr., Santiago de las Vegas, June, 
1905, Horne; July 21, 1915, P. Cardin (Johnston 168), 
Oct. 1916, Johnston 3, 4, 5, 13, 15, 16, 17; Baracoa (Prov. 
Oriente), April 15, 1916, Johnston 595. 
