ON GERANIACE/E 103 



with a flat, broad, hyaline papilla, at first smooth, then covered 

 with more or less distant, broadly conical, obtuse, subhyaline 

 warts, chestnut-brown, 20 — 30 x 18 — 24 /j, ; epispore 2 — 1\ fi 

 thick ; pedicels hyaline, deciduous. 



On Eupltorbia exigmt. Rare; Hampshire, Mr Hill (Plowr. 

 I.e.) ; King's Cliffe, Norths. (Grevillea, I.e.). Midlands (Purton, 

 I.e.). (Fig. 56.) 



For a long time this species was considered to have only uredo- and 

 teleutospores, but the connection of these with the secidium occurring on 

 the same species of Euphorbia was established by Tranzschel. Berkeley, 

 at King's Cliffe, found them all together. The description given above is 

 partly founded upon those of Tranzschel, Sydow, and Fischer. The 

 mycelium of the secidial stage infests the whole plant, that of the teleuto- 

 spores is more or less localised. 



Distribution : France, Germany, Switzerland. 



17. Uromyces G-eranii Otth et Wart. 



jEcidium Geranii DC; Cooke, Handb. p. 543; Micr. Fung. p. 199 p.p. 



Trichobasis Geranii Cooke, Handb. p. 530. 



Uromyces Geranii Otth et Wartm. Schweiz. Krypt. no. 401. Cooke, 



Micr. Fung. p. 213. Plowr. Ured. p. 12fc!. Sacc. Syll. vii. 535. 



Sydow, Monogr. ii. 190. Fischer, Ured. Schweiz, p. 16, f. 14. 



Spermogones. Mixed with the secidia, orange. 



sEcidiospores. /Ecidia hypophyllous or on the petioles, on 

 the leaves chiefly in the vicinity of the nerves and there 

 forming large dense clusters on thickened spots, on the petioles 

 forming elongated clusters and often causing great distortion, 

 at first hemispherical and closed, then opening by a round pore, 

 at length with a very slightly revolute incised margin, orange ; 

 spores somewhat ovate, densely and minutely verruculose, yellow, 

 22 — 28 x 18 — 24 p,; epispore rather thick. 



Uredospores. Sori hypophyllous, generally on brownish or 

 reddish-yellow spots, scattered or gregarious, minute, rounded, 

 pulverulent, cinnamon, surrounded by the cleft epidermis; 

 spores globose to obovate, sparsely echinulate, brown, 20 — 30 x 

 18 — 24 fi ; epispore about 2 /j, thick, with one (rarely two) 

 germ-pores. 



