178 NORTH AMERICAN FLORA [V01.XJMB 7 



1. Trachyspora Alchemillae (Pers.) Fuckel, Bot. 



Zeit. 19: 250. 1861. 



Uredo Alchemillae Pers. Obs. Myc. 1 : 98. 1796. 



Uredo polymorpha Alchemillae Strauss, Ann. Wett. Ges. 2 : 86. 1810. 



Uredo intrusa Grev. Fl. Edin. 436. 1824. 



Erysibe Alchemillae Wallr. Fl. Crypt. Germ. 2 : 199. 1833. 



Uromyces intrusus Iv6v. Ann. Sci. Nat. Til. 8 : 376. 1847. 



Caeoma asperum Bon. Abh. Nat. Ges. Halle 8 : 87. 1864. 



Uromyces Alchemillae Wint. in Rab. Krypt.-Fl. li : 146. 1881. 



O. Pycnia unknown. 



II. Uredinia hypophyllous , thickly scattered over large areas, roundish or oblong, 0.2- 

 0.5 mm. across, sometimes confluent, soon naked, pulverulent, orange-yellow, ruptured 

 epidermis conspicuous; urediniospores globoid, small, 16-21 by 19-24^ ; wall nearly color- 

 less, thin, 1 //, closely and finely verrucose, the pores scattered, obscure. 



III. Telia hypophyllous, at first arising from the uredinia, roimd, 0.2-0.5 mm. across, 

 soon naked, cinnamon -brown, ruptured epidermis evident; teliospores globoid or broadly 

 ellipsoid, 22-30 by 2Z-A0 fj- ; wall cinnamon -brown, thick, 3-4 /^ or more, coarsely and un- 

 evenly verrucose, or sometimes nearly or partially smooth ; pedicel colorless, once length 

 of spore or less, fragile, partially deciduous. 



On Rosaceae : 



Alchemilla pratensis F. W. Schmidt, Greenland. 

 Type locality : Europe, on Alchem-illa vulgaris. 

 Distribution: Greenland; also in Europe. 

 Illustration : Beitr. Krypt. Schweiz 2'^ : f. 34. 



19. TRIPHRAGMIUM Link, in Willd. Sp. PL 6' : 84. 1825. 



Cycle of development includes pycnia, uredinia, and telia, with distinct alternating 

 phases ; autoecious. Pycnia subcuticlar, other sori subepidermal. 



Pycnia subcuticular, flattish ; ostiolar filaments wanting. 



Uredinia erumpent, of two distinct sorts, the primary form, resulting from telial infec- 

 tion, indefinite, the secondary form definite, small, encircled by paraphyses. Uredinio- 

 spores borne singly on pedicels ; wall nearly colorless, echinulate, the pores obscure. 



Telia erumpent, more or less definite. Teliospores free, triangularly three-celled with 

 oblique partitions ; walls colored, verrucose, the pores usually one in a cell and apical, i. e.y 

 equidistant from septa. 



Type species, Triphraginium Ulniariae Link (on Ulmaria sp. ). 



1. Triphragmium Ulmariae (Schum.) Link, in Willd. 



Sp. PI. 6' : 84. 1825. 



Uredo Ulmariae Schura. Knum. PI. Saell. 2 : 227. 1803. 



Uredo Spiraeae Sow. Engl. Fungi;)/. 398. 1803. 



Puccinia Ulm.ariae Hedw. f.; Poir. in Lara. Encyc. 8 : 245. 1808. 



Uredo effusa Ulmanae Strauss, Ann. Wett. Ges. 2 : 91. 1810. 



Coleosporium Spiraeae P. Karst. Not. Sallsk. Faun. Fl. Fenn. Forh. 8 : 222. 1866. 



Caeoma Ulmariae Thum. Bull. Soc. Nat. Mosc. 531; 220. 1878. 



O. Pycnia epiphyllous, few, flat, reddish-yellow, inconspicuous, subcuticular involving 

 the lateral walls of the epidermal cells, about 350 /^ broad by 60 /i high. 



II. Uredinia at first (primary) amphigenous, more abundant below, indefinitely and 

 irregularly extended, large, 3-5 mm. broad by 5-15 mm. long, usually on the veins and 

 petioles causing hypertrophy and discoloration, soon naked, slightly pulverulent, bright 

 orange-yellow fading to pale-yellow, ruptured epidermis conspicuous ; paraphyses none : 

 uredinia afterward (secondary) hypophyllous and chiefly on the mesophyl, definite, round, 

 small, 0.5 mm. across, not causing hypertrophy, soon naked, very pulverulent, lemon-yellow; 

 paraphyses encircling the sori, cylindrical, 8-15 by 32-50 /i, the wall colorless, thin, less than 

 1//; urediniospores broadly ellipsoid, or obovate, 18-24 by 25-33 /u ; wall nearly colorless, 

 moderately thick, 1.5-3 M, sparsely echinulate with low, conical points becoming smaller and 

 inconspicuous at base, the pores scattered, very obscure. 



