ON UMBELLIFER.E 



197 



69. Puccinia Smyrnii Corda. 



JEcidium Bunii var. Smyrnii- Olusatri DC. Flor. fr. vi. 96. 



Trichobasis Petroselini Berk. ; Cooke, Handb. p. 529 p.p. 



Puccinia Smyrnii Corda, Icon. iv. 18, f. 67 (1840). Cooke, Handb. 



p. 503 ; Micr. Fung. p. 209, pi. 3, f. 55—6. Plowr. Ured. p. 199. 



Sacc. Syll. vii. 670. 

 P. Smymii-Olusatri Lindr. Faun, et Flor. fenn. xxii. no. 1, p. 9 



(1902). Sydow, Monogr. i. 416. 



Spermogones. Epiphyllous, on sunken spots. 



sEcidiospores. iEcidia hypophyllous or occasionally epi- 

 phyllous, in rather large irregular clusters, or on the petioles 

 and stems in elongated groups, on yellow spots, hemispherical, 

 yellow, opening by an irregular pore with a nearly entire 

 margin; spores globose or ovate to fusiform or pyriform, 

 delicately verruculose, yellowish, 16 — 40 x 16 — 20 p. 



Teleutospores. Sori hypophyllous, on small yellow spots, scat- 

 tered or a few together, minute, 

 pulverulent, dark-brown; spores 

 ellipsoid to oblong, rounded at 

 both ends, not thickened above, 

 hardly constricted, coarsely and 

 remotely reticulate and tuber - 

 culate, brown, 30 — 48 x 17 — 

 26 fi ; pedicels hyaline, thin, de- 

 ciduous, up to 60 jx long; epi- 

 spore rather thick. Fig _ U5 p SmyrniL Teleuto . 



. _. spores; a, as really sculptured; 



On Smyrnium UiUSatrum. b, as seen when wet. 



Rather common near the coast. 



iEcidia, April — June; teleutospores, June — August. (Fig. 145.) 



The secidia and teleuto-sori may occur on separate plants or on the 

 same. The markings on the teleutospore form a wide-meshed network, 

 which bears wart-like tubercles at the angles of the meshes. The aecidio- 

 spores bear more resemblance in form to uredospores than to what they 

 really are ; but they are produced in chains with intercalary cells in the 

 usual way : they are not echinulate, but delicately verruculose ; the 

 markings can easily be seen on an empty spore. The peridium-cells are 

 grossly verrucose on the inner surface, and are not arranged in regular 

 rows. It is this irregularity which causes the peridium (as is usual in 

 such cases) not to split into lacunae, but to open by a pore. 



