282 BERKELEY AND CURTIS, EXOTIC FUNGI. 



broadly oblong, constricted in the centre, and uniseptate, minutely granular, rough 

 at either end, with short flocci. 



A very singular production. The specimens are not in a sufficiently good condi- 

 tion to show the mode of origination of the spores. 

 29. Uredo fab^. Pers. Disp. p. 13. U. arachis, Schwein. MSS. ' 



On leaves of Arachis ; Surinam. 



The spores are perhaps a little paler, but the specimens are in bad condition. 



80. U. ASCLEPiADis, Schwein. MSS., hypophylla ; maculis subobliteratis, oppositis pallidis ; soris sparsis 

 depressis epidermide diu tectis ; sporis ellipticis fuscis. 



On the leaves of some Asclepias ; Surinam. 



Hypophyllous ; spots obliterated on the under side of the leaf, distinct and pallid 

 on the upper side. Sori scattered ; one or two on each spot, flat, for a long time 

 covered with the cuticle. Spores about 1-1 000th of an inch in diameter, elliptic, 

 brown. 



31. U. CIRCINATA, Schwein. MSS., maculis orbicularibus umbrinis ; soro centrali magno, aliis minoribus 

 circinantibus ; sporis globosis spinulosis. 



On the leaves of some unknown plant ; Surinam. 



Spots orbicular hypo-epiphyllous umber brown. Central sorus large, with smaller 

 arranged round it, surrounded by the ruptured cuticle ; spores globose, l-800th of 

 an inch in diameter, orange when fresh, pale when dry, strongly spinulose. 



The globose spinulose spores are the distinctive mark of this fine species. The 

 processes are nearly as strong as in Piiccinia aculeata, Schwein. 



32. Trichobasis labiatarum, Lev. in Diet. un. d'Hist. Nat. Art. Uredines. Uredo s^nandras, 

 Schwein. MSS. 



On leaves of Synandra ; Surinam. 



33. Cystopus CANDIDUS, Lev. 1. c. Uredo alba, Schwein. MSS., and U. eiipJiorliarum, Schwein. MSS. 



On both sides of the leaves of some Euphorbia. The specimens are young and 

 imperfect. 



34. UsTiLAGO BULLATA, Berk, in Hook. Fl. Nov. Zell. U. vaginata, Schwein. MSS. 

 On the leaves of some grass ; Surinam. 



The Surinam specimens differ merely in having the spores slightly smaller, and 

 the endochrome more contracted. The spores, when lying side by side on the 

 field of the microscope, are just distinguishable when the characters are ascertained. 

 The habit of the two forms is precisely the same. 



35. Aecidium heliotbopidatum, Schwein. MSS., hypo-epiphyllum ; maculis utrinque fuscis suborbicula- 



ribus ; peridiis brevibus sparsis margine breviter rotate. 

 On the leaves of some Heliotropium ; Surinam. 



Spots suborbicular, rather irregular, brown on both surfaces of the leaves, sprinkled 

 with short peridia, which have a narrow rotate toothed margin. 



