54 ARTHUR: NEW SPECIES OF UREDINEAE—XV 
Chrysopsora Mikaniae sp. nov. 
O. Pycnia chiefly epiphyllous, few in groups on discolored 
spots 2-4 mm. across, prominent, dark brown, immersed, 
globoid, II2-125u in diameter; ostiolar filaments short or 
wanting 
Ill. Telia hypophyllous, in annular groups 1.5—4 mm.across, 
roundish or oblong, 0.3—-1 mm. long,soon naked, at first waxy and 
reddish or golden yellow, becoming somewhat pulverulent and 
dirty white, ruptured epidermis usually conspicuous; teliospores 
cylindric, 13-16 by 54-63y, rounded at both ends, not con- 
stricted at septum; wall colorless, uniformly thin, 14, smooth; 
pedicel colorless, fragile, about as thick and long as the spore. 
On Mikania buddleiaefolia DC., Theresopolis, Estado do 
Rio, Brazil, September 28, 1921, E. W. D. & Mary M. Holway 
I159 (type); Mikania sp., San Felipe, South Yungas, Bolivia, 
May 21, 1920, E. W. D. & Mary M. Holway 637 (Carduaceae). 
The teliospores of this species have considerable resemblance to 
those of Puccinia Spegazzinit De-Toni, also occurring on Mikania, 
but differ greatly in their mode of germination. The presence 
of conspicuous pycnia and very dissimilar telia make the two 
species readily separable under a hand lens. 
Diorchidium brasiliensis sp. nov. 
Pycnia epiphyllous and petiolicolous, punctiform, brown- 
ish, ae conspicuous, subcuticular, flattened-conoidal, 32-40. 
high by 90-110p broad; la Sinead short or wantin 
Ill. Telia hypophyllous and petiolicolous, scattered, often 
confluent, roundish, 0.3-0.5 mm. across, subepidermal, soon 
naked, chestnut-brown, pulverulent, ruptured epidermis notice- © 
able; teliospores broadly ellipsoid or obovoid, the septa vertical, 
the cells binate, each one being obovoid or ellipsoid, 13-16 by 
20-25, rounded above, narrowed or rounded below; wall pale 
pres brown, uniformly thin, 1I-1.5u, coarsely verrucose 
above, smooth or somewhat verrucose below, the pore apical or 
pascal on so; pedicel prvi hese short, fragile, almost wholly 
disappearing from the 
On Cassia sp. fe Le Rio de Janeiro, Brazil, 
August 9, 1921, E. W. D. & Mary M. Holway to09. The genus 
Diorchidium was established by Kalchbrenner in 1882 (Gre- 
villea 11: 26), for a South African rust on Millettia caffra Meissn.., 
a leguminous host. The genus was characterized as having 
teliospores with didymous cells separated by a vertical septum. 
