166 
CHARLES B. PLOWRIGHT. 
I have previously mistaken these two Puccinia the one for the 
other. P. perplexans upon Lvcopsis arvensis (311, 312, 
326), Symphytum officinale (314, 329, 330), Borago 
officinale (327), and Pulmonaria officinale (328) gave 
no result. The same was the case when Ribes grossularia 
(371) and Lonicera pericly menum (313, 317) were infected 
with it. 
Puccinia perplexans may be thus described — 
I. iEcidiospores = iEcidium Ranunculi acridis. — 
Spores, 20 to 25 ju. in diameter, rather more orange in colour 
than those of the other Ranunculi ^Ecidia, otherwise not 
distinguishable. 
II. Uredospores. — Sori rubrotund elliptical, but mostly 
linear. On both surfaces of the leaves, especially on the upper, 
scattered but sometimes confluent, soon naked golden yellow. 
Spores, globose, oval or ovate, orange, finely echinulate 20 to 
25 jx. wide by 30 to 35 /x. long. With or without capitate 
paraphyses. 
III. Teleutospores. — Sori small, almost black, punctiform, 
linear, or elliptico-elongate, covered by the epidermis, often 
clustered and confluent. Spores very irregular in form and 
size. Clavate, oblong, or subfusiform on very short pedicels, 
apex sometimes thickened, sometimes not ; upper cell rounded, 
truncate, or attenuated, often obliquely ; lower cell generally 
somewhat cuneiform, central constriction slight or absent. 
Epispore pale clear brown, often apparently coarsely granular, 
40 to 60 fx. long by 10 to 12 fx. wide. 
I. On Ranunculus acris. II. and III. On Alopecurus 
pratensis, Avena elatior and Poa sp. ? Near King’s 
Lynn. May and June, 1884. 
