^^ NORTH AMERICAN FI.ORA [Voi^UME 7 



1. Tuburcinia Clintoniae Kom.; Jacz.-Kom.-Tranz. Fungi 



Rossiae 260, 1899. 



Sori in leaves, oval to subcircular, about 2-5 mm. in length, forming flat minutely 

 granular agglutinated black areas showing on both sides, permanently covered by the epi- 

 dermis ; spore-balls dark reddish-brown, ovoid to spherical, often surrounded by an incon- 

 spicuous covering of sterile threads, firm, of 6 to many spores, 27-75 /^ in length; spores 

 reddish-brown, variable, somewhat oblong or cuneate to chiefly polygonal in cross- section, 

 smooth, 12-18^ in length ; conidial stage unknown. 



On Convallariaceae : 



Streptopus roseus, British Columbia. 



Vagnera stellata {Smilacina siellata), Wisconsin. 

 Type locality : Siberia, on Clintonia udensis. 

 Distribution : Wisconsin and British Columbia ; also in Europe. 

 ExsiccATi : Ellis, Ev. & Barth. Fungi Columb. 1789; Seym. & Earle, Econ. Fungi C 128. 



2. Tuburcinia Trientalis B. & Br. Ann. Mag. Nat. Hist. 



II. 5 : 464. 1850. 



Ascomvces Trientalis Berk. Outl. Brit. Fungi 376. 1860. [Conidial stage.] 

 Sorosporium Trientalis Woronin ; Fisch. de Waldh. Aper^u Syst. Ust. 32. 1877. 



Sori on leaves, petioles and stems, variable, often pustular, on stems frequently form- 

 ing areas of considerable extent, sometimes erumpent ; spore-balls reddish-brown, irregu- 

 lar, oblong to subspherical , firm, usually with little evidence of sterile envelope, composed 

 of 10 to many spores, 45-100 // in length; spores reddish-brown, oblong to polyhedral, 

 smooth, 14-22 ii in length ; conidial stage forming a dense, white, epiphyllous coating usu- 

 ally over entire leaf, with hyaline, thin-walled, oblong to ovate conidia about 11-14 ," X 5-7 /i. 



On Primulaceae : 



Trientalis arctica {T. europaed)^ Alaska. 

 Type locality : Aberdeen, Scotland, on Trientalis europaea. 

 Distribution : Alaska ; also in Europe. 

 Illustration : Abh. Senck. Nat. Ges. 12 : 559. 



4. UROCYSTIS Rab.; Klotzsch, Herb. Viv. Myc. ed. 2. 393. 1856. 



Polycystis I,6v. Ann. Sci. Nat. III. 5 : 269. My 1846. Not Poly cystis Kiitz. Ja 1846. 



Sori usually in the leaves or stems, occasionally in other parts, producing dark-colored 

 usually dusty spore-masses ; spore-balls permanent, composed of an enveloping cortex of 

 tinted sterile cells and usually one to several interior fertile cells, of small to medium size ; 

 spores generally dark-colored, variable, of medium size ; germination by a short promycelium 

 producing terminally grouped sporidia which give rise to similar secondary sporidia or to 

 infection -threads . 



Type, Erysibe occulta Wallr. 



Sori in leaves, petioles or stems. 



Spore-balls without a true cortex. 1. U. Waldsteiniae . 



Spore-balls with a true cortex. 

 Spores usually 1-5 in the balls. 



Cortical cells incompletely covering spores. 2. U. Anemones. 



Cortical cells rather completely covering spores. 3. U. carcinodes. 



Spores usually 4-8 in the balls. 



Cortical cells 8-15 1^- ; spore-balls 30-60 m, rarely 90 m. 4. U. sorosporioides. 



Cortical cells 6-10 M ; spore-balls chiefly 28-55 /^. 5. U. Violae, 



Spores usually 1, rarely 2, in the balls. 



Cortical cells 6-10 m, rarely 12 m. 6. U. Lithophragmae . 



Cortical cells usually 4-8 ii*. 7. U. Cepulae. 



Spores usually 1 or 2, rarely 3 or 4, in the balls. 



Sori in areas or pustules. 8. U. Colchici. 



Sori in striae. 



Cortical cells incompletely covering spores. 9. U. occulta. 



Cortical cells completely covering spores. ' 10. U. Agropyri. 



Sori in the culm filling the interior. 11. U.Junci. 



Sori in the inflorescence. 



Sori in the spikelets. 12. U. granulosa. 



Sori in the flowers and pedicels. 13. U. Hypoxyis, 



