ON PRIMULACE 181 
scattered or circinate, minute, surrounded by the torn epidermis, 
brown; spores globose to ellipsoid, echinulate, pale-brown, 
20—-32 x 18—28 w; epispore thick (2—3 yw), with three germ- 
pores. 
Teleutospores. Sori similar, but black-brown; spores ellipsoid 
to ovate-oblong, with a broad paler apical papilla (5—8 pw high), 
gently constricted, usually rounded below, smooth, brown, 35— 
55 x 20—84 4; pedicels hyaline, deciduous, up to 50 » long.] 
On Soldanella alpina (Botanic Garden, Glasgow). All three 
spore-forms are said to occur together on the same plant in 
July and August. 
The zcidium stage is most common ; its mycelium is perennial and 
diffused through the plant, and causes a conspicuous change in the leaves ; 
they become smaller, paler, and longer-stalked. Only this stage seems 
to have been met with in Britain ; no doubt on imported plants, as has 
happened with P. Gentianae, P. Pazschket, etc. Description of the uredo- 
and teleuto-stages after Sydow. 
DIsTRIBUTION : Central Europe. 
53. Puccinia Hydrocotyles Cooke. 
Caeoma Hydrocotyles Link, Sp. Plant. ii. 22. 
Trichobasis Hydrocotyles Cooke, Journ. Bot. ii. 844; Handb. p. 530; 
Micr. Fung. p. 225, pl. 8, f. 168—9. 
Puccinia Hydrocotyles Cooke, Grevillea, ix. 14. Ph. et Pl. Grevillea, 
xiii. 53. Plowr. Ured. p. 195. Sacc. Syll. vii. 641. Sydow, 
Monogr. i. 388. 
[Hicidiospores. Acidia amphigenous, distributed pretty 
uniformly over the whole leaf, rarely single, cup-shaped, with 
a yellowish deeply cut revolute margin; spores punctate, pale- 
yellowish, 19—26 y.] 
Uredospores. Sori amphigenous, scattered, now and then 
confluent, often circinate round a central larger one, very 
minute, long covered by the epidermis, at length naked, pul- 
verulent, cinnamon; spores subglobose or ellipsoid, echinulate, 
brownish, 24—34 x 20—27 w, with two conspicuous germ- 
pores. 
