212 NORTH AMERICAN FLORA [Volume 7 



22-27 fjL in diameter; wall cinnamon-brown, moderately thin, about 1.5m, finely echinulate, 

 the pores 2, opposite in the equator, more or less inconspicuous. 



III. Telia hypophyllous, scattered, round, small, 0.1-0.3 mm. across, early naked, 

 pulvinate, very pale-brownish, cinereous by germination, ruptured epidermis inconspicuous ; 

 teliospores fusiform or lance-oblong, 15-19 by 45-70 /x, narrowed or obtuse at both ends, 

 slightly constricted at the septum; wall nearly or quite colorless, smooth, uniformly thin, 

 aboutl /i ; pedicel nearly or quite colorless, terete, delicate, one half to once length of spore. 



On Lamiaceae : 



Mesosphaerum capitatum {L,.) Kuntze {Hypiis capitaia Jacq.), Cuba, Porto Rico. 

 Mesosphaerum riigosum (I^.) Poll. (^Hypiis radiata Willd.), Florida, Mississippi, South 

 Carolina. 



Mesosphaerum spicatum (Poir.) Small {Hypiis spicata Poir.), Guatemala. 



Mesosphaerum suaveolens (ly.) Kuntze {Hypiis suaveolens Poir.), Cuba, Jamaica. 

 Type locality: Santee Canal, South Carolina, on Hypiis radiaia. 



Distribution : Along the coast from South Carolina to Mississippi, southward through the 

 West Indies and Central America. 



2. Eriosporangium fidelis Arthur. 



Puccinia fide lis Arth. Bull. Torrey Club 38 : 369. 1911. 



0. Pycnia hypophyllous, grouped among the aecia, prominent, punctiform, in section 

 imperfectly flask-shaped with shallow base, large, 112-144 ;u broad by 65 ^ high ; protruding 

 conoidal mass of ostiolar filaments 60-90/i high. 



1. Aecia hypophyllous and caulicolous, abundant, scattered over the whole plant from a 

 diffused mycelium, causing some hypertrophy and etiolation, chiefly seated on the woody 

 tissues and hence often in rows along the veins, buUate, mostly oval, large, 0.8-1.3 mm. 

 across, somewhat tardily dehiscent by irregular slits, orange-colored fading to dirty-white, 

 overarching epidermis reddish and prominent ; peridium wanting ; aeciospores globoid, 

 20-24 by 23-30 ju, mostly 23-26/1 in diameter; wall nearly or quite colorless, appearing very 

 thick, 2.5-3 M, coarsely and closely verrucose. 



II. Uredinia hypophyllous, scattered, round, small, 0.1-0.2 mm. across, soon naked, 

 dark cinnamon-brown, pulverulent, ruptured epidermis inconspicuous ; urediniospores 

 globoid, 21-24 by 23-26 /li, usually 23-25^ in diameter ; wall cinnamon-brown, rather thin, 

 1-1.5 M. finely and abundantly echinulate, the pores usually inconspicuous, apparently 2 



near the hilum. 



III. Telia hypophyllous, scattered, round, small, 0.1-0.2 mm. across, early naked, 

 pulvinate, very pale-brownish, cinereousby germination, ruptured epidermis inconspicuous ; 

 teliospores oblanceolate or fusiform, 17-19 by 50-67 m, narrowed or obtuse at both ends, 

 somewhat constricted at the septum, the upper cell usually shorter, and somewhat inverted 

 top-shaped; wall nearly or quite colorless, smooth, uniformly thin, 1/i or less; pedicel 

 nearly or quite colorless, terete, delicate, short, fragile. 



On Lamiaceae : 



Mesosphaerum siellulaiiim (Benth.) Kuntze {Hypiis sieliulaia'R^nth..), Jalisco. 



Mesosphaerum uriicoides (H.B.K.) Kuntze {Hypiis ur iicoides H.B.K.) , Guatemala. 

 Type locality : Hills near Guadalajara, Mexico, on Hypiis siellulaia. 

 Distribution: Central Mexico and southward. 



3. Eriosporangium tucumanense (Speg.) Arthur. 



Aecidium iucumanense Speg. Anal. Soc, Ci. Arg. 12: 79. 1881. 

 AecidiumHypiidisV.'R.^nn. Hedwigia34: 337. 1895. 



0. Pycnia amphigenous, few in small groups on slightly discolored spots, inconspicuous, 

 globoid, barely protruding above surface of leaf, 100-175 m broad by 100-150 m high. 



1. Aecia amphigenous and caulicolous, few in orbicular groups, or more on thickened 

 spots when caulicolous, orbicular, small, 0.1-0.3 mm. across, soon open, orange- colored fad- 

 ing to dirty-white ; peridium very fragile and evanescent, less conspicuous than the ruptured 

 epidermis; peridial cells loosely overlapping, small, 18-26 /x long, linear in radial section, 

 5-10/i across, the outer wall thin, 1-1. 5^, smooth, the inner wall somewhat thicker, about3M, 

 moderately verrucose ; aeciospores irregularly ellipsoid or lance-oblong, often acute above, 

 16-24 by 23-34m; wall nearly or quite colorless, moderately thick, 1.5-2. 5m, closely and 

 finely but conspicuously verrucose. 



