1918] ARTHUR—UREDINALES 469 
somewhat pulverulent, ruptured epidermis conspicuous; teliospores 
oblong, 23-27 by 42-52 4, rounded at both ends, slightly or not 
constricted at septum; wall cinnamon brown, 2.5—3u thick, 
thicker above by addition of a pale umbo, 5-7 wu, with prominent, 
longitudinal ridges 3-5 u apart; pedicel colorless, as long as the 
spore, fragile. 
It is a pleasure to have the privilege of dedicating this striking 
new species of rust to Dr. and Mrs. J. N. Rose, whose interest in 
the broad aspects of systematic botany could no better be attested 
than by the interesting collection of rusts reported in this article, 
made while studying the habits and distribution of certain groups 
of flowering plants. The rust is apparently quite unlike any 
previously described species, and occurs on a rare host, dedicated 
to Dr. Rose. 
13. Puccinia Mogiphanis (Juel), comb. nov. (on Amaran- 
thaceae).—Achyranthes sp., Oroya, Peru, July 14, III, no. 19498; 
Pasco, Peru, August 6, II, III, no. 18804. 
The material submitted by Dr. and Mrs. Rose agrees in its 
uredinia with type material (Vestergren, Micr. Rar. Sel. 794) of 
Uredo Mogiphanis Juel (Bih. K. Sv. Vet.-Akad. Handl. 23(3)'° :24. 
Jig. 35. 1897), but shows in addition an abundance of telia. JUEL 
describes and figures the urediniospores as thin-walled, probably 
due to mistaking the cuticle for the whole wall, and the thick inner 
portion of it for cell contents. The wall is in fact 3~4 u thick, and 
when well matured somewhat darker than indicated by JuEt. The 
pores are often 3 or 4, and somewhat equatorial, although more 
often 6 and unmistakably scattered, as JUEL says. 
The telia are amphigenous, o.5-1 mm. across, similar to the 
uredinia, soon naked, chestnut brown. The teliospores are ellipsoid 
or obovoid, 29-31 by 39-50 #, rounded at both ends, or somewhat 
narrowed at base, slightly constricted at septum. The wall is 
chestnut brown, 2.5-3.5 thick, becoming noticeably thicker 
above, 7-10 u. The pedicel is one to one and a half times the 
length of the spore, 7-9 » thick and hyaline. 
It is to be regretted that the Amaranthaceous hosts of neither 
the type material of Uredo Mogiphanis, collected in Brazil in 1904, 
and said to be on Mogiphanes, nor of the present collections from 
