Part 3. 1912] AHCIDIACBAE 213 



II. Uredinia chiefly hypophyllous, scattered, round, small, 0.1-0.3 mm. across, soon 

 naked, dark cinnamon-brown, pulverulent, ruptured epidermis inconspicuous ; uredinio- 

 spores globoid, 19-23 ^ in diameter ; wall cinnamon -brown, thin, 1-1.5 m, finely echinulate, 

 the pores very indistinct, apparently 2 in the equator. 



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

 pulvinate, white, ruptured epidermis inconspicuous; teliospores oblong, 16-22 by 30-35 /a, 

 obtuse or rounded at both ends, slightly constricted at the septum ; wall colorless, smooth, 



uniformly thin, about 1 ju ; pedicel colorless, terete, delicate, one half to once length of spore. 



On Lamiaceae : 



Mesosphaerum pectinatum (Poir.) Kuntze {Hyptis pectinata Poir.), Porto Rico, Jamaica. 

 Type LOCALITY : Province Tucuman, ArgG-ntinsL, on Hj/p its spicaia. 

 Distribution : West Indies ; also in South America. 



4. Eriosporangium evadens (Harkn.) Arth. Result. Sci. Congr. Bot. 



Vienne 343. 1906. 



ColeosporiuTn Baccharidis Cooke & Harkn. Grevillea 9 : 7. 1880. Not Eriosporangium Bacchari- 



dis Bertero, 1854. 

 Puccinia evadens Harkn. Bull. Calif. Acad. 1 : 34. 1884. 

 Caeoma Negerianum Dietel, Bot. Jahrb. 22 : 357. 1896. 



0. Pycnia amphigenous and caulicolous, scattered among the aecia on the leaves and 

 younger branches, inconspicuous, honey-yellow, globoid or ovate, 150-175 /^ in diameter, 



1. Aecia amphigenous, or more commonly caulicolous, causing fusiform or irregular 

 swellings of the branches, sometimes forming witches' brooms, scattered, oblong or oblong- 

 linear, 0.5-1 mm. wide by 1-4 mm. long, early dehiscent, at first orange-colored, drying 

 to a dirty-white, pulverulent, ruptured epidermis or cortex overarching, when the spores 

 fall away showing pits or fissures; aeciospores irregularly oblong, or oblong-fusiform, 

 22-26 by 35-60 z^, often narrowed and acute at both ends, but especially above; wall pale- 

 yellow or quite colorless, moderately thick, 2-3 m, somewhat thicker above, 3-9a( , noticeably 

 but finely verrucose, with thickly set and irregular warts. 



II. Uredinia chiefly hypophyllous, scattered, usually few, round or oblong, 0.1-0.3 

 mm. long, soon naked, orange-colored, becoming pale, somewhat pulverulent, ruptured 

 epidermis often overarching, otherwise inconspicuous; urediniospores broadly ellipsoid, 

 ob ovate -ellipsoid, or nearly globoid, 23-27 by 27-35 m; wall thin, 1.5-2 Mi nearly colorless, 

 finely and rather sparsely verrucose-echinulate, with points about 3^ apart, the pores 

 small, very indistinct, apparently more than 4 and scattered. 



III, Telia chiefly hypophyllous, and to some extent on the young branches, scattered, 

 round, 0.3-1 mm. across, soon naked, pulvinate, pale cinnamon -brown, or cinereous by 

 germination, ruptured epidermis inconspicuous ; teliospores oblong or obovate-oblong, 

 27-32 by 48-63 m, rounded at both ends, or somewhat narrowed below, somewhat constricted 

 at the septum; wall pale-brownish, or almost colorless, smooth, thin, 1.5-2ju, usually 

 thicker at the apex, 3-6 m; pedicel colorless, or slightly tinted, terete, 6-10/i in diameter, 

 thin-walled, once to twice length of spore. 



On Carduaceae : 



Baccharis consanguinea Greene, California. 



Baccharis Etnoryi A. Gray, Arizona. 



Baccharis pilular is DC, California. 



Baccharis pier onioides DC, Michoacan. 



Baccharis sp., Cuba. 

 Type locality: San Francisco, California, on Baccharis pilularis. 

 Distribution : Central California and Arizona southeastward through Mexico, and the West 



Indies; also in South America. 



ExsicCATi ; Ellis & Ev. N. Am. Fungi 1843 ; Sydow, Ured. 1716; Rab.-Wint. Fungi Eur. 3208 ; 

 Ellis & Ev. Fungi Columb. 53; Earth. Fungi Columb. 2761, 2762. 



5. Eriosporangium punctato-striatum (Dietel & Neger) Arthur. 



Puccinia Baccharidis Dietel & Holway ; Dietel, Erythea 1 : 250. 1893. Not Eriosporangium Bac- 

 charidis Bertero, 1854. 

 Caeoma punctato-striatum Dietel & Neger, Bot. Jahrb. 22 : 357. 1896. 



O. Pycnia amphigenous, numerous, crowded in small orbicular groups, comparatively 

 large, punctiform, globose-flask-shaped, 125-175 m in diameter; py^niospores globoid, 2-3 m 

 in diameter. 



