(470 



peridium whitish, dehiscent at apex and also rupturing r 

 less along the sides; peridial cells seen in both face 

 and side views, broadly lanceolate in face view, 18- 

 3SX7S-I i SM) linear-rhomboid in side view, 16-35^ 

 thick, outer wall rather thin, 1.5-2^, smooth, inner 

 and side walls rather thick, 7-1 2/*, evenly and 

 densely verruculose; aeciospores globoid, 19-26X21- 

 29^, wall chestnut-brown, 2-3^ thick, finely verrucose. 

 Telia caulicolous, appearing on firm, woody, glo- 

 bose galls 0.5-5 cm. in diameter, unevenly disposed, 

 densely aggregated or often separated 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 U-.--.jj 

 by 3-4 mm. high, often confluent, light chestnut- Fig. 32. G. 

 brown; teliospores 2-celled, narrowly ellipsoid, 18- Nelsoni. 

 26X50-65^, narrowed at both ends, slightly con- 

 stricted at the septum; wall pale cinnamon-brown, 1-1.5M thick; 

 pores 2 in each cell, near the septum. 



For the aecia: Cydonia vulgaris (L.) Pers., Amelanchier alnifolia 

 Nutt., A. elliptica A. Nels., A. oreophila A. Nels., A. polycarpa 

 Greene, A. pumila Nutt., Peraphyllum ramosissimum Nutt., 

 Pyrus communis L. 



For the telia: Juniperus monosperma (Engelm.) Sarg. /. scopu- 

 lorum Sarg., /. utahensis (Engelm.) Lemm. 

 Type locality: Laramie Hills, Wyoming, on Juniperus scopu- 



Dist 



Utah. 177. 



For explanation of the synonomy of this species see note under 

 G. juvenescens {No. 14). 



37. Gymnosporangium corniculans Kern, Mycologia 2: 236. 

 1910 

 Aecia hypophyllous, crowded in irregular or sometimes annular 

 groups 2-5 mm. across, on discolored hypertrophied spots, cylin- 

 dric or horn-shaped, acutish at apex, 2-3.5 mm - high, 0.3-0.5 

 mm. in diameter; peridium not or only rarely rupturing at apex, 

 very tardily dehiscent by longitudinal slits along the sides; peridial 

 cells usually seen in face view, broadly lanceolate, 16-23X64-96/11, 

 rhomboid in side view, 18-25/n thick, outer wall 1.5-2^ thick, 

 smooth, inner and side walls rather thick, 5-7/*, moderately ver- 

 rucose with oval or roundish papillae and a few delicate elongated 



