PARt 3, 1912] ABCIDIACBAB 207 



only in face view, lanceolate, 19-29 by 87-105 /a, usually obtuse below and considerably nar- 

 rowed above, not hygroscopic, remaining straight when wet, the walls smooth on all sur- 

 faces, the inner and side walls 3-4 /x thick, the outer wall 12-16 ju thick; aeciospores glo- 

 boid, 19-26 jLi in diameter ; wall light cinnamon-brown, 2-3^ thick, very moderately verru- 

 cose, the pores 6-8, scattered. 



On Malaceae : 



Crataegus clara Beadle, Florida. 

 Crataegus dispar Beadle, South Carolina. 

 Crataegus egens Beadle, Florida. 

 Crataegus egregia Beadle, Florida. 

 Crataegus Michauxii Pars., South Carolina. 

 Crataegus munda Beadle, North Carolina. 

 Crataegus pex a Beadle, North Carolina. 

 Crataegus guasita Beadle, Florida. 

 Crataegus viridis I^., South Carolina. 

 Crataegus visenda Beadle, Florida. 



III. Telia unknown. 



Type locality ■ South Carolina, on Crataegus sp. 



Distribution : Atlantic coast from North Carolina south to northern Florida. 

 Illustrations : Bot. Gaz. 49 : pL 22, f. 11; Bull. N. Y. Bot. Card. 7 : 470, /. 31. 

 BxsicCATi : Rav. Fungi Am. 37. 



28. Gymnosporangium Nelsoni Arth. Bull. Torrey 



Club 28: 665. 1901. 



Roesielia Nelsoni Arth. Bull. Torrey Club 28 : 665. 1901. 

 Aecidium Nelsoni Farl. Bibl. Index 1 : 68. 1905. 

 Gymnosporangium durum Kern, Bull. Torrey Club 34 : 460. 1907. 



0. Pycnia epiphyllous, gregarious, in small groups 0.5-1 mm. across, on discolored 

 spots, punctiform, rather prominent, orange-yellow becoming blackish, 128-144 ju in diameter 

 by 100-112 jLt high ; ostiolar filaments 35-80 ju long. 



1. Aecia hypophyllous and fructicolous, usually in small groups 1-2 mm. across, cylin- 

 drical, 2-4 mm. high by 0.2-0.3 mm. in diameter ; peridium whitish, dehiscent at apex and 

 also rupturing more or less along the sides ; peridial cells seen in both face and side views, 

 broadly lanceolate in face view, 18-35 by 75-115 /*, linear-rhomboidal in side view, 16-35 ju 

 thick, the outer wall rather thin, 1.5-2ju, smooth, the inner and side walls 7-12/z thick, 

 evenly and densely verrucose ; aeciospores globoid, 19-26 by 21-29 /a ; wall chestnut- brown. 

 2-3 ju thick, finely verrucose, the pores 6-10, scattered. 



On Malaceae : 



Amelanchier alnifolia Nutt., Colorado, Utah, Wyoming. 



Am-elanchier elhptica A. Nels., Colorado. 

 Amelanchier oreophila A. Nels., Colorado, Wyoming. 

 Amelanchier poly carp a Greene, Wyoming. 

 Amelanchier pumita Nutt., Montana. 

 Cydonia vulgaris (Iv.) Pers., Colorado. 

 Peraphyllum. ramosissimum. Nutt., Colorado. 

 Pyrus communis L. , Colorado. 

 Sorbus occidentalis (S. Wats.) Greene, Montana. 



III. Telia caulicolous, from a perennial mycelium, appearing on firm, woody, regularly 

 globose galls 0.5-5 cm. in diameter, unevenly disposed, densely aggregated or often sepa- 

 rated by the scars of the sori of previous seasons, irregularly flattened, about 1-1.5 mm. 

 broad by 1-5 mm. long at the base, 3.5 mm. high, often confluent, light chestnut-brown; 

 teliospores 2-celled, narrowly ellipsoid, 18-22 by 50-^5 m, narrowed at both ends, slightly 

 constricted attheseptum; wall pale cinnamon-brown, 1-1. 5/x thick, the pores 2in each cell, 

 near the septum ; pedicel hyaline, cylindrical, uniform, 4-6 /x in diameter, very long. 



On Juniperaceae : 



Juniperus monosperma (Engelm.) Sarg. {Sabina monosperma Rydb.), Colorado, Wyoming. 

 Juniperus scopulorum Sarg. {Sabina scopulorum Rydb.), Colorado, Montana, Utah, 



Wyoming ; Alberta. 

 Juniperus utaheyisis (^ngelm.) I,emm. (/. californica utahensts Engelm., Sabina utahen- 



sis Rydb.), Arizona, Colorado. 

 Type locality: Ivaramie Hills, Wyoming, on Juniperus scopulorum. 

 ■Dtstrtbution • Alberta south to Colorado and Arizona. 



Illustrations: Bot. Gaz. 49: ^A ^2./. i:?; Bull. N. Y. Bot. Gard. 7: 471,/.J2; pi.l61,J68. 

 ExSicCATi : Ellis & Ev. Fungi Columb. 1676; Garrett, Fungi Utah. 177. 



