470 
J. C. ARTHUR 
listed was recently described as a new species by Kern, P. Kellermanii 
(Mycologia 9: 210. 1917), but a careful comparison seems to indicate 
that only one species is involved. The pores of the urediniospores are 
9 often indistinct, and appear to vary from 2 to 4, always equatorial. 
122. PucciNiA Pallor Arth. & Holw. (on Amaryllidaceae). 
Bomaria acutifolia Herb., Volcan de Agua, Dept. Sacatepequez, 
Jan. 13, 1915, II, III, ^4; same, March 7, 1916, O, I, II, III, 562. 
An Eriosporangium-like species with all spore forms. It occurs 
also in Costa Rica. 
123. PucciNiA Cannae (Wint.) P. Henn. (on Cannaceae). 
Canna sp., Mazatenango, Dept. Suchitepequez, Feb. 22, 1916, II, 
A common long-cycle rust of the tropics, whose pycnia have not 
been seen. Whether pycnia are associated with aecia or with primary 
uredinia can not be predicted. It was collected by Kellerman at 
Mazatenango, Feb. 28, 1905 (Kellerm. Fungi Sel. Guat. j). 
124. PucciNiA PoLYGONi-AMPHiBii Pers. (on Polygonaceae) . 
Persicaria {Polygonum) sp. 
A collection was made by Kellerman at Laguna, Lake Amatitlan, 
Jan. 25, 1906, II, 5392, and reported by Kern in Mycologia /. c. 
This long-cycle species is not uncommon in the tropics, where only 
uredinia are generally found. 
125. PucciNiA punctiformis Diet. & Holw. (on Polygonaceae). 
Rumex crispus L., Solola, 6500 feet alt., Jan. 25, 191 5, II, ii6\ 
Panajachel, Dept. Solola, Jan. 3, 1917, II, III, 6^/6. 
A long-cycle species, whose aecia are not known. It ranges from 
Berkeley, Calif., southward through Mexico, into Central America. 
126. PucciNiA DETONSA Arth. & Holw. (on Caryophyllaceae). 
Stellaria ovata Willd., Colomba, Dept. Ouezaltenango, Feb. 3, 1917, 
824. 
A short-cycle species, occurring on the same host in Costa Rica. 
The spores have thinner walls than in P. Arenariae. 
127. PucciNiA MODiCA Holw. (on Caryophyllaceae). 
Arenaria alsinioides Willd., Volcan de Agua, Dept. Sacatepequez, 
March 4, 1916, II, iii, 561. 
Arenaria lanuginosa Rohrb., Solola, 7000 feet alt., Jan. 25, 1915, II, 
III, III. 
