158 Bulletin 313 



CiNTRACTiA juNCi (Schw.) Trel.— On tlie inflorescence of Jun- 

 cus tenuis. 



"Sori usually linear, surrounding peduncles and pedicels for more 

 or less of their length, sometimes in basal parts of the flowers and 

 even occasionally filling the ovaries, forming an agglutinated black 

 spore-mass; sterile cells usually not evident since inconspicuous and 

 early evanescent ; spores black-brown, subopaque more or less ag- 

 glutinated, somewhat compressed laterally and so appearing oblong 

 to irregularly polygonal or subcircular according to view, minutely 

 pitted, 14-22 fx in length." North Amreican Flora, v. 7, p. 34 (1906). 



911. Infected inflorescence of Jnncus tcniiis. 912. Spores, 1/12. 



Entyloma australe Speg. — On the leaves of Physalis virginiana. 

 "Sori in leaves, forming thin at first light-yellow but later darker- 

 colored roundish or angular areas, usually 0.5-6 mm. in length ; 

 spores light to reddish yellow, ovoid tO' spherical or slightly angled, 

 usually with apparently thick wall, chiefly 10-16 /a in length, conidia 

 forming withish epi- or hypophyllous growths, linear, somewhat 

 curved, usually 30-55 x 1-2 /^.'' North American Flora, v. 7, p. 64 

 (1906). 



913- Infected leaf of Physalis virginiana. 914. Spores, 1/12. 



Urocystis cepul^ Frost. — On bulbs of Allium cepa. "Son in 

 leaves forming isolated pustules or often affecting them for the 

 greater part of their length and breadth, sometimes occurring at their 

 base in the bulbs upon rupture of covering membrane disclosing a 

 dusty black-brown spore-mass ; spore-balls ovoid to spherical, small 

 17-25 IX in length, sterile cells tinted, ovoid to spherical, small rather 

 completely covering tlie spores, usually 4-8 fx in length ; spores red- 

 dish-brown, ovoid to spherical, usually 1, rarely 2 in a ball, chiefly 

 12-16 fx in length." North American Flora, v. 7, p. 57 (1906). 



915. Spores, 1/12. 



Urocystis occulta (Wallr.) Rob. — On cultivated rye. "Sori in 

 leaves (especially on under side of sheaths), culm and inflorescence 

 forming linear striae usually of great length and often merged into 

 a continuous stratum of dusty reddish-black spore-balls ; spore-balls 

 oblong to spherical, 16-32 /u. in length ; sterile cells often incompletely 

 covering the spores, hyaline or yellowish-tinted, subspherical to ob- 

 long, usually with distended and uniformly thickened walls, spores 



