ON LABIATvE 171 



Puccinia Menthae Pers. Syn. p. 227. Cooke, Handb. p. 496 ; Micr. 

 Fung. p. 204 p.p., i>l. 4, f. 69, 70. Plowr. Ured. p. 157. Sacc. 

 Syll. vii. 617. Sydow, Monogr. i. 282. Fischer, Ured. Schweiz, 

 p. 168, f. 131. McAlpine, Rusts of Australia, p. 140, f. 250. 



P. Clinopodii DC. ; Cooke, Micr. Fung. p. 205 (?). 



Spermogunes. Scattered or arranged in little groups, honey- 

 coloured. 



jEcidiospores. /Ecidia hypophyllous and often on the 

 stems, arranged on the leaves in clusters on orange or purplish 

 spots, or forming elongated patches on the stems and petioles 

 which are much thickened and deformed, opening irregularly, 

 margin scarcely torn, erect or even incurved ; spores verruculose, 

 pallid-yellow, 24—40 x 17— 28/*. 



Uredospores. Sori hypophyllous, on yellowish or brownish 

 spots (or without spots), minute, roundish, scattered or aggre- 

 gated, soon naked, surrounded by the ruptured epidermis, 

 sometimes confluent, cinnamon; spores globose 

 to obovate, echinulate, pallid-brown, 17 — 28 x 

 14 — 19/x, with three equatorial germ-pores. 



Teleutospores. Sori similar, but dark-brown; 

 spores subglobose to obovate, rounded at both 

 ends, with a broad pale-coloured apical papilla, 

 not or scarcely constricted, more or less in- 

 distinctly verruculose, sometimes smooth, dark- 

 brown, 26 — 35x19— 23 /*; pedicels hyaline, 

 slender, longer than the spore. P. Menthae. 



• ht n/r Teleutospore 



On Mentha aquatica, M. arvensis, M. citrata, on M. aquatica. 



M. rotundifolia, M. silvestris, M. vir'idis, Ori- 

 ganum vulgare, Galamintha Clinopodium, C. officinalis. May — 

 October, teleutospores from August. Very common on garden 

 Mint, rather common on some of the other species. (Fig. 121.) 



There can be little doubt that this is a collective species. Points of 

 difference are found in the finer or coarser warts of the teleutospores and 

 in the length of the pedicel ; but hitherto no certainty has been arrived at 

 in delimiting the various forms. I have seen the warts quite distinctly on 

 some of the teleutospores on M. aquatica and M. arvensis, when they are 

 viewed dry, but other spores in the same sorus seemed perfectly smooth. 

 The secidium seems not to occur on all species, though it is common on 



