532 
J. C. ARTHUR 
203. PucciNiA AFFiNis Syd. (on Carduaceae). 
Verhesina perymenioides Schultz Bip., Guatemala City, Jan. i, 
1915, ii, III, 6; Laguna, Lake Amatitlan, Feb. 8, 1915, II, 200. 
Neither pycnia nor aecia have yet been seen in connection with 
this species. It was collected by Kellerman on an undetermined 
species of Verbesina, appearing very similar to V. perymenioides, at 
Laguna, Lake Amatitlan, Jan. 20, 1906, II, III, 5455, and reported by 
Kern in Journ. Myc, under the name of P. Ximenesiae Long, a very 
similar species. 
204. PucciNiA Melampodii Diet. & Holw. (on Carduaceae). 
Melampodium divaricatum (Rich.) DC, Mazatenango, Dept. 
Suchitepequez, Feb. 22, 1916, 5/5. 
A short-cycle leptoform rust, rarely collected. It is known from 
the type locality in central Mexico, and by a previous collection from 
Guatemala, seen in the cryptogamic herbarium of the New York 
Botanical Garden, on the same host, made in Dept. Escuintla, March, 
1890, by J. Donnell Smith. 
205. PucciNiA TiTHONiAE Diet. & Holw. (on Carduaceae). 
Tiihonia diversifolia (Hemsl.) A. Gray, San Rafael, Dept. Guate- 
mala, Jan. 10, 1915, II, iii, 6y, same, Jan. 12, 1915, II, 60; 
San Felipe, Dept. Retalhuleu, Jan. 12, 1917, II, /oj. 
Tithonia rotundifolia (Mill.) Blake {T. tagetiflora Desf.), Mazaten- 
ango, Feb. 21, 1916, II, III, 574; San Antonio, Dept. Suchi- 
tepequez, Feb. 24, 1916, II, 526] San Felipe, Dept. Retalhuleu, 
Jan. 12, 1917, II, 6q6\ same, Jan. 14, 1917, II, 775. 
Tithonia scaberrima Benth., Quezaltenango, Jan. 16, 1917, II, 72^. 
Tithonia tuhaeformis Cass., Antigua, Dept. Sacatepequez, Jan. 11, 
1915, II, 70; Guatemala City, Dec. 20, 1916, II, III, 606. 
A long-cycle rust, similar to P. Helianthi Schwein, whose first stage 
is unknown. It was described from Mexico on T. cubi flora,'' an 
error for T. tuhaeformis. The first named host has not before been 
reported. The species was collected by Kellerman on T. tuhaeformis, 
at Guatemala City, Feb. 3, 1905, II, III, 4328, and at Laguna, Lake 
Amatitlan, Jan. 30, 1906, II, III, 542^, and reported by Kern in Journ. 
Myc. /. c. No. 5425 was also issued in Kellerm. Fungi Sel. Guat. 18. 
206. PucciNiA Gnaphalii (Spcg.) P. Henn. (on Carduaceae). 
Gnaphalium rhodanthum Schultz Bip., Volcan de Agua, Dept. 
Sacatepequez, March 7, 1916, II, 575*. 
