96 



Mycologia 



Since the publication of the Porto Rican list of rusts, attention 

 has been called to the prior publication of Uredo Plucheae Syd., 

 as a name for this rust, and Dr. H. Sydow has kindly sent me a 

 part of the type for examination. 



The present collection is also accompanied by aecia, which 

 may or may not be genetically connected with the uredinia. The 

 aecial infection shows as purplish spots, 3-5 mm. across, with 

 pale centers, on the under side of which only a few, small, pale 

 aecia were found. Upon making sections the fragile peridium 

 was disclosed, not extending above the leaf surface. The peri- 

 dial cells are rhomboidal, slightly overlapping, about 15 by 26 /a, 

 the outer wall smooth, about 3/x thick, the inner wall verrucose, 

 thin, about 1.5 /x thick. The aeciospores are globoid, 14-19 ja in 

 diameter, the wall thin, 1 /x, colorless, minutely and inconspicu- 

 ously verrucose. 



122. Uredo Sparganophori P. Henn. 

 On Carduaceae: 



Strnchium Sparganophorum (L.) Kuntze, Mayagiiez, 

 March 6, 169, March 8, 170, March 13, 171, March 27, 

 172. 



A collection was made by J. R. Johnston at Carolina, P. R., 

 Feb. 18, 1914, II, 1416. 



The uredinia of this form are amphigenous, with the grouping 

 somewhat different on the two sides of the leaf. Beneath they 

 are usually scattered, while above they form cespitosely pulvinate 

 groups. The sorus and spores from the two sides, however, do 

 not appear unlike. 



Species Previously Reported from Porto Rico, Not in the 



Above List 



123. Milesia coluMbiensis (Dietel) Arth., on Nephrolepis 



rivularis (Polypodiaceae) , Stevens. 



124. Ravenelia Cebil Speg., on Piptadenia peregrina (Caesal- 



piniaceae) , Stevens. 



125. Ravenelia portoricensis Arth., on Cassia emarginata 



( Caesalpiniaceae') Heller. 



126. Ravenelia cassiaecola Atks., on Chamae crista Aeschyno- 



mene (Caesalpiniaceae) , Stevens. 



