74ft UredinacPSB, Poridprniiuin. 



loiig., 1-0 mm. cr., distinctis v. raro confluentibus, pallide flavis, 

 bullatis, (lepressis; periflio circumscissili, mox dejecto, 2 cellulas 

 circ. crasso, cellulis rotundatis v. irregularibus, tunica crassa, ra- 

 radiatim striata; aicidiosporis obovatis v. ellipsoideis 24-33 ^ 15-24, 

 tunica hyalina, 3-5 ;j.. cr., uniformi, crebre verrucosa, area basali 

 et sublaterali levi praBditis, tubercuiis 1 ;j.. circ. longis, tarde de- 

 ciduis. 



Ilah. in ramis P i n i T ;e d fe et P i n i p a 1 u s t r i s, Amer. bor . 



6. Peridermium globosum Arthur et Kern. Bull. Torr. bot. Club, 2S28 

 XXXIII (1906; pag. 424. — Pycnidiis ignotis; aecidiis caulicolis, 

 hypertrophias sph;croideas 2-3 cm. diam. efformantibus, plerumque 

 confluentibus e paUide flavis albis; peridio circumscissili, extus 

 verruculoso intus verrucoso, cellulis lanceolatis, angustis, radiatim 

 dispositis, tunica crassa, radiatim striata, subtubercuiata ; tecidio- 

 sporis eliipsoideis 26-31 « 16-22, tunica hyalina, parum verrucosa 



2-3 \i.. cr., area basali lateraUter subexpansa levi crassiori prfeditis. 

 Hdb. in ramis Pini Strobi, Leone Rock Wisconsim Ame- 

 rico borealis. 



7. Perldermlum gracile Arth. et Kern, Bull. Torr. Bot. Cl. XXXfll 2829 

 (1906) p. 417. — Pycnidiis amphigenis, numerosis, sparsis, rima 

 longitudinali 500-750 » 190-350 dehiscentibus, depresso-conoideis, 

 subcuticularibus, 60-75 ;j.. altis; fecidiis amphigenis, e mycelio li- 

 mitato orientibus, numerosis, in maculis decoloratis, sparse insi- 

 dentibus, rimula longitudinali erumpentibus, 0,3-0,5 mm. lat . la- 

 teraliter compressis 0,5-1,5 mm. long., 1-1,8 mm. alt., irregula- 

 riter erumpentibus; peridio hyalino, moderate firmo, 30-40 ;j.. long., 

 tunica transverse striata, intus moderate verrucosa, 6-9 ;j.. crassa, 

 extus tenuiori 4-6 ;j, ; .ecidiosporis ellipsoideis, 23-39 « 18-24, tu- 

 nica hyalina, crebre et ;equaliter verrucosa tuberculis latis deciduis 

 prifdita, 3,5 ;j.. cr. 



Ilah. in foliis Pini filifoliae, Mexico, Amer. bor. 



8. Perldermium intermedium Arth. et Kern, Bull. Torr. Bot. Club, 2830 

 XXXllI 1906 p. 416. — Pycnidiis amphigenis, sparsis, conspi- 

 cuis, rima longitudinali 0,3-0,4 mm. lat., 0,5-0,75 mm. long. de- 

 hiscentibus, subcuticularibus, depresse conoideis , 65-80 ;j,. alt. ; 

 :i'cidiis amphigenis, o mycelio limitato orientibus, sparsis, in ma- 

 culis decoloratis plus minusve expansis dispositis, rima longitudi- 

 nali erumpentibus, lateraliter depressis, sublinguiformibus, 1,5-3 

 mm. lat., 0.8-1,6 mm. alt., rima apicali erumpentibus ; peridio 

 liynlino, subfirmo. cellulis 35-50 ;j.. long., paullo longioribus quara 



