A text-book of mycology and plant pathology . on Alopecurus pratensis; (3) f. sp. festucce on Festucas; (4) f. on rye grass, Lolium perenne; (5) f. sp. glyceric^ on Glyceria aqua-tica; (6) f. sp. agropyri on Agropyron repens; (7) f. sp. epigm on Cala-magrostis epigeios; (8) f. sp. hold on Holcus lanatus. Crown Rust of Grasses, Puccinia coronaia, with its aecium on Rham-nus jrangula. Three special forms of this rust are known: (i) f. on Calamagrostis arundinacea; (2) f. sp. phalaridis on 1 Arthqr, J. C. and Kern, F. D.: North American Species of Torr.
A text-book of mycology and plant pathology . on Alopecurus pratensis; (3) f. sp. festucce on Festucas; (4) f. on rye grass, Lolium perenne; (5) f. sp. glyceric^ on Glyceria aqua-tica; (6) f. sp. agropyri on Agropyron repens; (7) f. sp. epigm on Cala-magrostis epigeios; (8) f. sp. hold on Holcus lanatus. Crown Rust of Grasses, Puccinia coronaia, with its aecium on Rham-nus jrangula. Three special forms of this rust are known: (i) f. on Calamagrostis arundinacea; (2) f. sp. phalaridis on 1 Arthqr, J. C. and Kern, F. D.: North American Species of Torr. Bot. Clnb, 33: 403-438, 1906. RUST FUNGI 203 P/nilaris arnudinacca; (,•;) f. sp. agroslis on Agrosiis vulgaris and A,slolonifera. Yellow Rust of Wheal, Puccinia glumarum, without any known tecial stage. It has according to Eriksson the following specialized forms: (i) f. sp. tritici on wheat; (2) f. sp. secalis on rye; (3) f. sp. ^hordei on barley; (4) f. sp. Elymi on elymus arenarius; (5) f. sp. agropyri on couch grass, Agropyron Fig. 72.—Hollyhock rust, Puccinia malvacearum. (Nanluckel, August 19, 1915.) Brown Rust of Wheat, Puccinia triticina, with aecia unknown-Dwarf Rust of Barley, Puccinia simplex. Timothy Rust, Puccinia phlei-pralensis. Experiments to get thisform to infect barberry leaves have met with indifferent success. Chrysanthemum Rust, Puccinia chrysanthemi, on leaves of Chry-santhemum sinense in greenhouses all the year round. 204 MYCOLOGY Dandelion Rust, Puccinia taraxaci, on the dandelion Taraxacumofficinale, rather common in Europe, North America, Japan and theEast Indies. Reed Grass Rust, Puccinia phragmitis, with aecia on Rumex crispus,R. ohtusijolius and urediniospores and teliospores on reed grass Phrag-mites communis. ,
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