ON PLUMBAGINACE^E 



89 



This species was formerly united with C. Armeriae (q.v.), but the 

 teleutospores are distinctly different. 



Distribution : Europe, North Africa, Siberia and North 

 America. 



4. Uromyces Armeriae Lev. 



Caeoma Armeriae Schlechtd. Fl. Berol. ii. 126. 



Uromyces Armeriae Lev. Ann. Sri. Nat. ser. 3, viii. 375. Sydow, 



Monogr. ii. 40. Fischer, Ured. Schweiz, p. 52, f. 39. 

 U. Limonii Plowr. Ured. p. 122 p.p. Sacc. Syll. vii. 532 p.p. 



Spermogones. Scattered among the a?cidia, honey-coloured. 



sEcidiospores. yEcidia amphigenous, scattered or in small 

 clusters, at first hemispherical, then cup-shaped, with a whitish 

 incised margin ; spores densely. and minutely verruculose, yellow, 

 17— 28x 16—22^. 



Uredospores. Sori amphigenous, sometimes on purplish 

 spots, rounded or elongated, surrounded or half-covered by the 

 cleft epidermis, pulverulent, cinnamon ; spores globose to 

 oval, very densely and minutely verruculose, yellowish-brown, 

 24 — 32 x 21 — 28 /a ; epispore 2| — 3 /x thick, with two or three 

 germ-pores. 



Teleutospores. Sori similar, dark-brown ; spores globose to 

 ovate, rounded and thickened (7 /jl) at the 

 apex, with a broad flat cap, usually 

 rounded below, smooth, brown, 24 — 36 

 x 21 — 32 /x : pedicels hyaline, nearly as 

 long as the spore, seldom persistent. 



On leaves and peduncles of Armeria 

 maritima. Not uncommon. iEcidia in 

 May and June ; uredospores from June 

 onwards ; a few teleutospores begin to 

 appear in the uredo-sori towards the end 

 of July. (Fig. 41.) 



This species was united by Plowright with U. Limonii, but is distin- 

 guished by the more readily pulverulent sori, the shorter and broader 

 teleutospores, and the shorter hyaline pedicel which is easily detached. 

 The distinctness of the two species does not seem, however, to have been 

 tested by experimental cultures. Though the uredo- and teleutospores 



Fi<^. 41. U. Armeriae. 



Teleutospore and 



uredospore. 



