(455) 



22. Gymnosporangium germinale (Schw.) Kern, Bull. Torrey 



Club 35: 506. 1908 

 Caeoma {Peridermium) germinale Schw. Trans. Am. Phil. Soc. II. 



4: 294. 1832. 

 Peridermium {Caeoma) germinale Schw. Trans. Am. Phil. Soc. II. 



4: 310. 1832. 

 Podisoma Gymnosporangium clavipes Cooke & Peck, Jour. Quek. 



CI. 2: 267. 1871. 

 Gymnosporangium clavipes Cooke & Peck, Ann. Rep. N. Y. State 



Mus. 25:89. l8 73- 

 Roestelia aurantiaca Peck, Ann. Rep. N. Y. State Mus. 25: 91. 



1873- 

 Puccinia clavipes Kuntze, Rev. Gen. PI. 3: 507. 1898. 

 Tremella clavipes Arth. Proc. Ind. Acad. Sci. 1900: 135. 1901. 

 Aecidium auranliacum Fa.r\ow,Bib\. Index 1: 19. 1905. Not A. 



aurantiacum Bon. i860. 

 Aecidium germinale Arth. Result. Sci. Congr. Bot. Vienne 343. 



Aecia fruiticolous and caulicolous, crowded on hypertrophied 

 areas of variable size on the twigs and peduncles, occupying part 

 or nearly all of the surface of the fruits, cylin- 

 dric, 1.5-3 mm - high by °-3~°-5 mm - in diam- 

 eter; peridium whitish, becoming coarsely lac- 

 eate, sometimes to base, erect or spreading; 

 peridial cells seen in both face and side views, 

 polygonal-ovate or polygonal oblong in face 

 view, 19-39X45-95/*, rhomboid in side view, 

 25-40/1 thick, outer wall moderately thick, 3- 

 5/i, inner wall very thick, i3-23/*,coarsely ver- 

 rucose with loosely set, large, irregularly 

 branched papillae, side walls verrucose on 

 inner half similar to inner wall; aeciospores 

 globoid, large, 21-32X24-39/*, wall pale yel- 

 low, thick, 3-4.5/*, rather coarsely verrucose 

 with crowded slightly irregular papillae. 



Telia caulicolous, appearing on slight fusi- 

 form swellings, usually aggregated, roundish, 

 1-4 mm. across, often confluent, hemispheric, 

 1-3 mm. high, orange-brown; teliospores 2- 

 celled, ellipsoid, 18-26X35-51/*, roundish or Fig. 19. G. ger- 

 somewhat acutish above, obtuse below, minale 

 slightly or not constricted at the septum, wall 

 yellowish, 1-2/t thick, slightly thicker at the apex; pedicels 

 carotiform, 9-19/* in diameter near the spore; pores one in each 

 cell, apical in the upper, near the pedicel in the lower. 



