Parr 5, 1920] AECIDIACEAE 347 
brown, thin, 1 » or less, thicker above, 3-5 u, smooth; pedicel about one half length of spore, 
tinted. 
On CYPERACEAE: 
Cyperus ferax I,. C. Rich., Costa Rica. 
E LOCALITY: San José, Costa Rica, on Cyperus ferax. 
DistrisuTion: Known only from the type locality. 
106. Dicaeoma antioquiense (Mayor) Arthur. 
Puccinia antioquiensis Mayor, Mém. Soc. Neuch. Sci. Nat. 5: 473. 1913. 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous and cauticolous, scattered, small, punctiform or somewhat 
oblong, long covered by the epidermis; urediniospores broadly ellipsoid or obovoid, 14-19 
by 18-26 »; wail nearly colorless or pale-yellow, thin, about 1 », minutely and sparsely echin- 
ulate, the pores obscure, apparently 3, equatorial. 
III. Telia caulicolous or hypophyllous, scattered, rounded or slightly elongate, long 
covered by the epidermis, finally dehiscent and. somewhat pulverulent; teliospores clavate- 
oblong, 11-16 by 35-50 u, rounded, truncate, or somewhat acuminate at apex, attenuate at base, 
slightly or not constricted at septum; wall golden- or light cinnamon-brown, paler below, very 
thin, about 1», thicker at apex, 1.5-3 u, smooth; pedicel about half length of spore, slightly 
tinted. 
ON CYPERACEAE: 
Cyperus diffusus Vabl, Panama. 
TYPE Locality: Antioquia, Colombia, on Cyperus diffusus. . 
DISTRIBUTION: Panama; also in South America. 
107. Dicaeoma Eleocharidis (Arth.) Kuntze, Rev. Gen. 3?: 468. 
1898. 
Puccinia Eleocharidis Arth. Bull. Iowa Agr. Coll. Dep. Bot. 1884: 156. 1884. 
Aecidium compositarum Eupatorii De-Toni, in Sacc. Syll. Fung. 7: 798. 1888. 
O. Pycnia amphigenous, few in small orbicular groups, punctiform, hone y-yellow becoming 
reddish-brown, rather inconspicuous, globoid, 100-170 « in diameter; ostiolar filaments 35- 
60 » long. 
I, Aecia hypophyllous, in crowded groups about the pycnia on discolored spots that are 
usually conspicuous, cupulate, low, 0.2-0.3 mm. in diameter; peridium delicate, the margin 
deeply lacerate and revolute; peridial cells rhomboidal, 24-34 » long, the outer wall 4-6 u 
thick, striate, the inner wall 2~3 u, verrucose; aeciospores globoid, 16-21 by 18-24 uw; wall 
colorless, about | « thick, finely verrucose. 
On CARDUACEAE: 
Eupatorium maculatum L., Colorado, Indiana, Iowa, Nebraska, New York. 
Eupatorium perfoliatum 1,., Delaware, Illinois, Indiana, Iowa, Kansas, Maine, Michigan, 
Nebraska, New Jersey, New York, Pennsylvania, Wisconsin; Nova Scotia, Ontario. 
Eupatorium purpureum ,., Alabama, Delaware, Indiana, Iowa, Michigan, Nebraska, New 
Jersey, New York, Pennsylvania, Wisconsin; Manitoba, Quebec. 
Eupatorium rotundifolium 1., Delaware, Mississippi. 
Eupatorium serotinum Michx., Louisiana, Oklahoma. 
Exupatorium verbenaefolium Michx., Alabama. 
II. Uredinia chiefly culmicolous, scattered, oblong, 0.3-1 mm. long, tardily dehiscent by 
longitudinal slits, somewhat bullate; urediniospores broadly ellipsoid or obovoid, 17-24 by 
26-40 uw; wall yellowish or light cinnamon-brown, about 1.5 w thick, rather sparsely and finely 
echinulate, the pores equatorial, usually 4, in occasional spores 3 or 5. 
III. Telia chiefly culmicolous, scattered, oblong, 0.5-1.5 mm. long, tardily dehiscent by 
longitudinal slits, somewhat bullate, blackish-brown; teliospores clavate-oblong, 13-19 by 32~. 
65 w, slightly or not constricted at septum, truncate, rounded, or obtuse above, somewhat 
narrowed at the base; wall light chestnut-brown, paler below, smooth, about 1 » thick, much 
thicker at apex, 3-7 4; pedicel short, tinted. 
On CYPERACEAE: 
Eleocharis capitata (L.) R. Br. (Scirpus capitatus L.), Cuba; Porto Rico. 
Eleocharis intermedia (Muhl.) Schultes, Iowa, New York, Pennsylvania, 
Eleocharis obtusa (Willd.) Schultes, Indiana, Oklahoma. ; 
Eleocharis ovata (Roth) R. & S., New York, West Virginia. 
