UREDINALES OF GUATEMALA 483 
dermis inconspicuous; urediniospores oblate-spheroid, 23-27 fx broad 
by 19-23 fjL long, or triangular obovoid, 21-23 /jl broad by 23-26 fx 
long; wall dark cinnamon-brown, 1.5-2 ijl thick, moderately and 
strongly echinulate, the pores 2-3, subequatorial. 
TeHa among and similar to the uredinia, but somewhat darker; 
teliospores oblong or ellipsoid, 23-29 by 35-50 yu, rounded at both ends, 
not constricted at septum; wall chestnut-brown, 2-3.5 M thick, thick- 
ened over the germ pores into a low yellowish umbo, 5-7 fi thick, 
moderately verrucose with the markings uniting into short irregular 
lines, giving the appearance of being coarsely verrucose, the pore of 
lower cell variable; pedicel colorless, two to three times length of spore, 
with thin wall, i fj, or less. 
The species is closely related to P. mitrata Syd., from which it dif- 
fers in the thinner-walled and more oblong teliospores and in larger 
and characteristically shaped urediniospores. 
A collection made by Lagerheim on Salvia macrostachya at Pangor, 
Ecuador, September, 1891, appears to be the same species, although 
possessing only uredinia. 
This species, taken with the preceding four species, makes up a 
group of tropical salvia rusts with many intergrading forms. They 
are to some extent limited by hosts, but morphological characters are 
at present the chief means of separation. Much of the study of the 
Salvia rusts has been done by Dr. E. B. Mains, and his discriminating 
judgment has been followed in assorting the collections. More varied 
material on well identified hosts is needed to get a clear understanding 
of this difficult group. 
163. PucciNiA IMPEDITA Mains & Holw. (on Lamiaceae). 
Salvia occidentalis Swartz, Antigua, Dept. Sacatepequez, Dec. 27, 
1916, II, 642; San Felipe, Dept. Retalhuleu, Jan. 13, 1916, II, 
712. 
The full life cycle for this species is not yet known. The rust is not 
uncommon in southern Mexico and the West Indies on the same host 
as well as on others. 
164. PucciNiA DELICATULA (Arth.) Sacc. & Trott. (on Lamiaceae). 
Salvia cinnaharina Mart. & Gal., Quezaltenango, Jan. 18, 1917 
(with P . farinacea) , 751; same, Jan. 23, 191 7 (with P . farinacea) , 
y6p; same, Jan. 31, 1917, 811. 
Salvia elegansYahl, Solola, Jan. 28, 1915 (with P . farinacea) , 140. 
Salvia Holwayi Standley, Quezaltenango, Jan. 18, 191 7 (with P. 
farinacea), 74J ; Zunil, Dept. Quezaltenango, Jan. 28, 191 7, ySp. 
