172 Bulletin 313 



cui-ved, when wet, the outer wall moderately thin, 2.5-3 fi, smooth, 

 the inner wall coarsely rugose, moderately thick, 4-6 fx, the side 

 walls ratlier sparsely rugose with ridges running from the inner 

 side obliquely downward, extending about half-way across or more 

 and becoming gradually broader, with shorter ridge-like papillae in 

 the intervening spaces; seciospores globoid or broadly ellipsoid, 

 16-24 by 21-31 fi; wall light chestnut-brown, moderately thick, 2-3 fi, 

 finely verrucose, the pores distinct, 8-10 scattered. On various spe- 

 cies of malus. 



"III. Telia foliicolous, from an annular or biennial mycelium, ap- 

 pearing on globoid or reniform gall-like excrescences 5-30 mm. or 

 more in diameter, rather evenly disposed, about 1.5-4 mm. apart, 

 cylindrical or cylindrical-acuminate, becoming about 1.5-3 mm. in 

 diameter by 10-20 mm. long when fully mature, golden-brown, be- 

 coming yellowish and pulverulent by germination, the ruptured 

 tegumentar}^ tissues raised about the base of the sori in an even ring- 

 like manner ; teliospores 2-celled, rhombic-oval or narrowly ellipsoid, 

 15-21 by 42-65 fx, obtuse or acute at both ends, slightly or not con- 

 stricted at the septum; wall pale cinnamon-brown, uniformly thin, 

 about 1 fx, the pores 2 in each cell, near the septum : pedicel hyaline, 

 cylindrical, unifomi, 3-5 /* in diameter, very long." North American 

 Flora, V. 7, p. 209 (1912). 



953. Aecidium from apple leaf, 2/3. 954. Peridial cell, 1/12. 955. Aecio- 

 spores, 1/12. 956. Teleutospores from Juniperus virginiana. 



Gymnosporangium germinale (Schw.) Kern. — On Juniperus sp. 



"O. Pycnia chiefly fructicolous, gregarious, in irregular groups, 

 on slightly hypertrophied areas occupying part or all of the surface, 

 prominent, conspicuous, honey-yellow becoming blackish, slightly 

 flattened-globose, large 160-270 fx in diameter by 150-230 fx high; 

 ostiolar filaments 90-150 fi long. 



"I. Aecia fructicolous and caulicolous, crowded on hyper- 

 trophied areas of variable size on the twigs and peduncles, oc- 

 cupying part or usually all of the surface on the fruits, cylindric, 

 1.5-3 mm. high by 0.3-0 mm. in diameter; peridiimi whitish, becom- 

 ing coarsely lacerate sometimes to base, erect or spreading peridial 

 cells seen in both face and side views, not hygroscopic, remaining 

 straight when wet, polygonal-ovate or polygonal-oblong in face 

 view, 19-39 by 45-95 fx, rhomboidal in side view, 25-40 fx thick, the 

 outer wall moderately thick, 3-5 fx, smooth, the inner wall very thick 

 13-23 fx, coarsely verrucose with rather loosely set, large, very ir- 

 regularly branched papillae, the side walls verrucose on the inner 



