ARTHUR AND JoHNSTON: UREDINALES OF CUBA 169 
136. Uredo Sapotae sp. nov. 
ON SAPOTACEAE: 
Achras Sapota L. (Sapota Achras Willd.), Santiago de las 
Vegas, March 5, 1916, Johnston 493 (type). 
Uredinia hypophyllous, scattered or somewhat gregarious in 
close groups of a few each on small discolored areas, 0.5-1 mm 
across, oval, 0.1-0.3 mm. long, subepidermal, rather tardily naked, 
cinnamon-brown, pulverulent, opening by a lateral rupture of the 
epidermis which remains as an evident flap; peridium and para- 
physes none; urediniospores in one view triangular, when revolved 
one fourth broadly obovate, 18-22 by 21-26 u; wall cinnamon- 
brown, moderately thick, 1.5-2 u, closely echinulate, the pores 2, 
opposite and close to the hilum, in the obovoid view of the spore 
seen in the lateral walls. 
The same fungus on the same host was collected by E. W. D. 
Holway at Nassau, Bahamas, March 2, 1903. 
I37. Uredo Lucumae sp. nov. 
ON SAPOTACEAE: 
Lucuma nervosa A. DC., Santiago de las Vegas, June 25, 
1915, О, II, 146 (type), Feb. 23, 1916, II, 490, March 5, 
1916, О, II, 494, all by Johnston. 
Pycnia amphigenous, numerous, on discolored spots 5-15 mm. 
across, punctiform, honey-yellow becoming brown, subcuticular, 
hemispherical in section, 80-100 broad; ostiolar filaments 
wanting. 
Uredinia amphigenous, rarely only hypophyllous, surrounding 
and among the pycnia on purplish-brown spots, usually crowded, 
irregularly roundish, 0.1-0.3 mm. in diameter, subepidermal, 
early naked, pulverulent, the hypertrophied tissues forming a 
protective structure for the sorus; urediniospores globoid or broadly 
ellipsoid, 24-35 by 35-42 и, larger when wet by swelling of the 
gelatinous layer; wall lamellate, the inner portion firm, golden- 
or cinnamon-brown, 2-34 thick, the outer portion pale, swelling 
to 4-9 thick, the cuticle bearing coarse, conical tubercles, the 
pores indistinct. 
The distinctive character of this rust suggests its relation to 
Prospodium or Uropyxis. The Uromyces Lucumae Diet., from 
Brazil, is a wholly unlike species, judging from the description. 
138. UnEDO OPERCULiNAE Arth. Mycologia 9: 95. 1917. 
ON CONVOLVULACEAE: 
Operculina dissecta (Jacq.) House (Convolvulus dissectus 
