356 UREDINEAE. 



P. stachydis D. C. On Stachys recta. 



P. argentata (Schultz). On Impatiens. (]>i'itain and U.S. America.) 

 P. Berkeley! Pass. On Vi)ica. (Plowright distinguishes also 1\ rincae.) 

 (Britain.) 



(4) Uredospores absent or only rudimentcoy. The other spore- 

 forms — pi/cnidia, aecidia, and teleutosp>ores — develop on the same 

 host-plant. {Piiccinio'psis, Schroct.) : 



Puccinia tragopogonis (Pers.) (Britain). On Trago^wgon, 

 Scorzonera, Podospcrmum, and Galasia. The leaves of diseased 

 plants arc conspicuous in spring from their slenderness and 

 pale colour. 



P. senecionis Lib.^ (Britain). The mycelium inhabits species 

 of Senecio ; it probably arises from aecidiospores, and produces 

 both aecidia and teleutospores. 



P. ipomeae Cooke. On Ipomea in U.S. America and S. Afi'ica. 



P. bunii (D. C). On Carum Bulbocastaniim and Pimpinella Sa.vifraga 

 (Britain). 



P. srayrnii Biv. On Hmyrnum Olusatrum. (Britain.) 



P. trollii Karst. On Aconitum Lycoctonum and Trollius europaeus. 



P. Valerianae Carest. On Valeriana officinalis and Centranthus 

 Calcitrapa. 



P. liliacearum Duby. On Ornithogahim, Scilla, and Oagea. (Britain.) 



(5) Teleutospores cdone produced ; they hiher^iate in dead host- 

 rernai/is {]\[icropucci7iia, Sclrroet.) : 



Puccinia fusca (Eelhan.). (Britain and U.S. America.) 

 Anemone-rust. The brown spore-patches of this fungus occur on 

 various species of Anemone, Thalictrmn, and Pidsatilla. Attacked 

 plants of Anemone nemorosa (Fig. 190, 6 and 7) have their leaves 

 much altered, the petioles being abnormally long and the laminae 

 much thickened, with narrowed segments, and conspicuously pale- 

 green. The teleutospore-patches form chocolate-brown spots on 

 the lower surface of the leaf, and stripes on the leaf-margins. 

 Flowers are rarely developed on diseased plants ; Fentzling, 

 however, found flowering plants with aecidia on tlie leaves ; 

 three of the perianth-parts being stunted. The same investi- 

 gator found a few anatomical changes in deformed plants ; in 

 petioles the middle one of the three vascular bundles normally 

 present was larger than those on each side of it ; in the dis- 

 eased lamina the ])arenchyma-cells were enlarged, while inter- 



iDietel, Iledwiyia, 1891, p. 291 ; also Ze'itschrlft f. Pflnnzenlcrankheiten, 1893, 

 p. 258. " ' 



J 



