216 NORTH AMERICAN FI,ORA [Volume 7 



III. Telia amphigenous, in compact irregular groups, from punctiform to 1 mm. across, 

 soon naked, chocolate-brown or blackish, usually shining, ruptured epidermis inconspicu- 

 ous, or in small flecks giving a grayish appearance to the surface, no germination in situ 

 seen; teliospores linear-oblong or oblong-lanceolate, small, 12-16 by 39-50 /i, obtuse or 

 rounded above, narrowed below, slightly or not constricted at the septum ; wall smooth, 

 chestnut-brown above, very much lighter toward the base, thin, 1-1.5//, much thickened 

 above, 6-12//; pedicel tinted, slender, 3-5" in diameter, terete, tapering downward, one 

 half length of spore or less. 



On Carduaceae : 



Baccharis glomeruliflora Pers., Florida. 

 Type locality : Mt. Dora, Florida, on Baccharis glomeruliflora. 

 Distribution : Known only from the type locality. 



10. Eriosporangium Baccharidis-hirtellae (Dietel & Hoi way) Arth. 



Result. Sci. Congr. Bot. Vienne 343. 1906. 



Puccina Baccharidis-hirtellae Dietel & Holway ; Holway, Bot. Gaz. 31 : 331. 1901. 



O and I. Pycnia and aecia unknown. 



II. XJredinia hypophyllous, abundant; scattered, round, small, 0.1-0.3 mm. across, at 

 first bullate, early naked, pulverulent, cinnamon-brown, ruptured epidermis barely notice- 

 able ; urediniospores broadly obovate or globoid, 18-21 by 20-26 jti ; wall pale cinnamon- 

 brown, thin, 1-1.5 ;u, strongly verrucose-echinulate with points about 3^ apart, the pores 

 obscure, probably 3 or 4 and equatorial. 



III. Telia hypophyllous, abundant, scattered, round, early naked, small, 0.2-0.5 mm. 

 across, pulvinate, chestnut-brown, or somewhat cinereous by germination, ruptured epi- 

 dermis inconspicuous ; teliospores ellipsoid, 24-30 by 35-42 ju, rounded at both ends, or some- 

 what obtuse below, slightly constricted at the septum ; wall minutely verrucose or punc- 

 tate especially toward the upper part, light chestnut-brown, concolorous, moderately thick, 

 1.5-2.5 /i, thicker above, 3-7 ju ; pedicel nearly or quite colorless, terete, slender, 3-5 m thick, 

 about once length of spore. 



On Carduaceae : 



Baccharis hirtella DC, Mexico (state). 

 Type locality : Amecameca, Mexico, on Baccharis hirtella. 

 Distribution: Central Mexico. 



11. Eriosporangium egregium Arthur. 



Puccinia egregia Arth. Bull. Torrey Club 38 : 370. 1911. 



0. Pycnia hypophyllous, preceding the aecia, nimierous, especially along the veins, 

 punctiform, inconspicuous, honey-yellow, in section flattened-globoid, 140-175 /x broad by 

 100-130 M high ; ostiolar filaments about 60// long. 



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

 a diffused mycelium, causing etiolation, at first more numerous along the veins and stems, 

 bullate, mostly oval, large, 0.5-1 mm. across, the prominent peridium soon bursting 

 through the swollen, reddish base ; peridium cylindrical, or flattened laterally, large, 0.3-0.5 

 mm. in diameter, 0.5-0.8 mm. high, fragile and somewhat evanescent ; peridial cellsloosely 

 overlapping, ellipsoidal in face view, linear-rhomboidal in radial section, 30-50 ^ long, 10-15 m 

 across, the outer wall thin, about 2^, smooth, the inner wall somewhat thicker, about 3 ^u, 

 strongly verrucose ; aeciospores broadly ellipsoid or globoid, 16-21 by 19-26 /a ; wall color- 

 less, thin, 1.5At, strongly verrucose with closely set beads. 



II. XJredinia not seen ; urediniospores intermixed with the teliospores, globoid, 21-26 

 by 24-29 /I ; wall cinnamon-brown, rather thin, about 1.5 ju, finely echinulate, the pores indis- 

 tinct, apparently 2 and equatorial. 



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

 naked, loosely pulvinate, becoming pulverulent, chestnut-brown, ruptured epidermis incon- 

 spicuous ; teliospores ellipsoid, or obovate-ellipsoid, 21-27 by 35-45 m, rounded or somewhat 

 narrowed at the base, obtuse or rounded at the apex, slightly constricted at the septum ; 

 wall minutely verrucose or punctate, cinnamon-brown, thin, 1.5 ju, much thickened at apex 



