ON LILIACE.*: 



235 



On Ornithogalum umbellatum. Rare; Lytham and near 

 Carlisle (Rev. Hilderic Friend). March— May. (Fig. 181.) 



As usual, only spermogones and teleutospores are present on these 

 specimens. Fischer records that he found the fungus on 0. umbellatum in 

 .March and April in great plenty, with spermogones and teleutospores, but 

 no secidia ; the infested parts of the leaves were swollen, compact, and 

 harder than the healthy portions. He suggests (Centralbl. f. Bakt. 2. xv. 

 230) with great probability that the recidia with spermogones which are 

 also found on Ornithogalum (JEcidhom omithogaleum Bubak, Annal. Myc. 

 iii. 222) belong to some heteroecious species. The fungus on 0. umbellatum 

 is a biologic race ; it does not attack 0. nutans, much less other allied 

 species of Liliacere, such as Muscari and Hyacinthus, although P. Lilia- 

 rearuiK is recorded on them. Fischer adds that the mycelium is not 

 perennial, but infection takes place afresh each spring by the basidiospores 

 of the overwintered teleutospores, from leaves lying on the ground. 



Distribution : Central Europe. 



Cooke, Handb. p. 528 ; Micr. 



Micr. Fung. p. 212. 



104. Puccinia Porri Wint. 



Credo Porri Sow. Engl. Fl. pi. 411. 

 U. Alliorum DC. Flor. fr. vi. 82 p.p. 



Fung. p. 217 p.p. 

 Uromyces Alliorum DC. ; Cooke, Handb. p. 518 



Plowr. Ured. p. 137 p.p. 

 Puccinia Porri Wint. Pilze, p. 200. Plowr. Ured. p. 148. Sacc. Syll. 



vii. 605. Sydow, Monogr. i. 610. Fischer, Ured. Schweiz, 



p. 80, f. 61. 



Uredospores. Sori amphigenous, on indeterminate pallid 

 spots, scattered or more or less in 

 rows, minute, at first covered by 

 the swollen epidermis, yellowish or 

 reddish-yellow ; spores globose to 

 ellipsoid, very delicately echinulate, 

 yellowish, 20—30 fi. 



Teleutospores. Sori amphigenous 

 or caulicolous, generally without 

 spots, scattered, minute, oblong or 

 roundish, about 1 mm. wide, but 

 sometimes confluent into larger 

 patches, long covered by the lead-coloured epidermis, black- 

 brown ; spores oblong or clavate, rounded or rather truncate 



Fig. 182. P. Porri. Teleuto- 

 spores and mesospore, on A. 

 Schoenoprasum. 



