Uredinacefe inferiores, Roestelia. 409 



peridiis hypophyllis, biseriatis, sine maculis, primitus subrotundatis 

 clausis, demum vertice irregulariter disrumpentibus, apice lacera- 

 tis, albis; cellulis pseudoperidii forma et magnitudine variis; seci- 

 diosporis plerumque globosis v. subglobosis, rarius ovato-ellipsoi- 

 deis, confertim verrucosis, hyalino-flavescentibus, 19-24 ;j.. diam. 

 Hab. in acubus vivis Pseudotsuga) Douglasii, Glacier, 

 Columbia britannica (Holway). 



2. Peridermium ornamentale Arthur in Bull. Torr. Bot. 01. 1901, 1351 

 pag. 665. — Pseudoperidiis foliicolis biseriatis hypophyllis, cylin- 

 draceis, 1-2 mm. longis, initio luteo-pallidis; a^cidiosporis obovatis, 

 ellipticis vel globulosis, 13-17 w 20-26, episporio tenui verruculoso. 



Hab. in foliis Abietis lasiocarpa^, Mount Paddo, Washin- 

 gton Amer. bor. 



3. Peridermium conorum Thiim. — Syll. VII, pag. 836. Obser- 

 vante cl. Oud. in Revue Myc. 1902, species nascitur in Abiete 

 excelsa, nec A. pectinata. 



RCESTELIA Rebent. — Syll. VII p. 833, XI p. 222, XVI p. 348. 



1. Rcestelia fimbriata Arthur in Bull. Torr. Bot. 01. 1901, p. 666. — 1352 



Pycnidiis-epiphyllis, in maculis luteis insidentibus, prominentibus. 

 nigrescentibus ; ascidiosoris hypophyllis gregariis vel plerumque 

 coniluentibus ; pseudoperidiis dehiscentibus, in longas laciniaa (!<•- 

 sinentibus; sporidiis subglobosis 32-45 ;j.. cliam., castaneo-brunneis, 

 medio incrassatis, verrucosis. 



Hab. in foliis Sorbi cujusdam, in montibus Elk, Wyoniing 

 Amer. bor. 



2. Rcestelia Nelsonii Arthur in Bull. Torr. Bot. 01. 1901, p. 665. - 1353 

 Pycnidiis epiphyllis, in maculis luteis insidentibus, congestis, pro- 

 minentibus, nigrescentibus, numerosis ; secidiosoris hypophyllis con- 

 gestis; pseudoperidiis 2-4 mm. long., rectis v. curvulis, dehiscen- 

 tibus, apice subacutis, clausis; ;ocidiosporis globosis. 24-30 ;j.. 

 diam., castaneo-brunneis, minute verrucosis v. levibus. 



Hab. in foliis Amelanchieris alnifolise, Laramie Hills, 

 Wyoming Amer. bor. — Stat. a^cid. Gymnosporangii Nelsoni Arth 



3. Ro3Stelia solenoides Diet. iri Bot. Jahrb. 1903, p. 631. — Pseu- 1354 

 dopericliis hypophyilis, in maculis iiavo-brunneis perpaucis conso- 

 ciatis, tubiformibus, iiavo-brunneis, ore angustato praeditis, usque 



3 mm. longis; aBcidiosporis irregulariter globosis v. late ollipsoideis 

 18-21 \i. diam., usque 24 ;j.. longis, opisporio tlavo-brunneo, dense 

 verrucoso tenui indutis. 



