II EMI LEI A . 383 



obovate, strongly but sparsely echinulate-verrucose all over, 

 13— 15 /a diam. or 18—25x12—16/*. 



On Phajus Walliclrii. Botanic Gardens, Glasnevin, Dublin 

 (Sir Frederick Moore). April. (Fig. 286.) 



The description and figures a, b, and c are derived from some slides 

 mounted by Sir Frederick; 1 have not seen the leaves, which were not 

 preserved, but there is an exactly similar form on Phajus sp. in Herb. 

 Kew, tinlocalised but apparently sent up by some gardener for identifica- 

 tion. This also was named Uredo Li/iidiii at first. 



Hemileia Oncidii Griff, et Maubl. 



Hemileia Oncidii Griff, et Maubl., Bull. Soc. Myc. Fr. 1909, p. 138, 

 pi. vi. 



Uredospores. Sori hypophyllous, numerous, pulverulent, 

 orange, minute, 50 — 100 \x diam.; fertile hyphse issuing from 

 stomata, fasciculate, branched, 25 — 30 /u. long, clavate above; 



Fig. 287. H. Oncidii. Uredospores, a, wet, b, dry : c, part of leaf, showing 

 uredo-sori, x i. From the specimen in Herb. Kew. 



spores globose or rarely obovate, echinulate-verrucose, filled 

 with orange drops, 16 — 18 /x diam., occasionally 20 /x long; 

 epispore hyaline. 



[Teleutospores. Sori growing in the centre of the spots, 

 pallid-brownish ; spores subglobose or pyriform, at first hyaline, 

 aculeate, then pallid-brown and somewhat smooth, 20 — 23 x 

 15—20/*.] 



On Oncidium varicosum, imported by Messrs Stuart Low 

 & Co. from San Paulo, Brazil, August, 1909. Specimen in 

 Herb. Kew. (Fig. 287.) 



In the Kew specimen, the spots occupied by the crowded groups 

 of uredo-sori are more or less oval, ^ — 1 cm. across, and covered with 

 orange-yellow dust, but as the sori are limited, each by the stoma, 

 through which it issues, they never become confluent. The description is 

 founded upon that of Griffon and Maublanc; only uredospores were seen. 

 What is doubtless the same species has been found at the Botanic 



