Part 3, 1912] ABCIDIACBAE) 201 



aeciospores subgloboid, 21-24 by 24-29 m; wall pale-yellow, 2.5-3.5 ju thick, finely verru- 

 cose, the pores numerous, scattered. 



On Hydrangeaceae : 



Fendlera rupicola Engelm. & Gray, New Mexico. 

 Fendlera Wrtghtii Heller, Arizona. 

 Philadelphus ellipticus Rydb., New Mexico 

 Phtladeiphus microphyllus A. Gray, Colorado. 

 Philadelphus occidenialis A. Nels., Colorado. 



III. Telia caulicolous, from a perennial mycelium, appearing on long fusiform swellings, 

 arranged in more or less evident longitudinal rows, cristiform, laterally compressed, irregu- 

 larly crenate above, 2-7 mm. long by 1-1.5 mm. broad, 3-4 mm. high, sometimes confluent, 

 orange-yellow ; teliospores 2- or 3-celled, ellipsoid or oblong, 20-26 by 50-80 m, rounded above 

 and below, slightly constricted at the septa; wall pale-yellow, thin, about l)u, the pores 2 

 in each cell, near the septa ; pedicels cylindrical, 7-10 ju in diameter, very long. 



On Juniperaceae : 



Juniperus monosperma (Engelm.) Sarg. (/. occidenialis monosperma :Btigelm., Sadtna 



ntonosperma Rydb.), Colorado, New Mexico. 

 Juniperus pachyphlaea Torr. {Sabina pachyphlaea Ant.), Arizona, New Mexico. 

 Jumperus ulahensts (Engelm.) I,emm. (/. californica utahensis ^ngelm.. Sabina ulahen- 



sis Rydb.), Colorado, Utah. 



Type locality : Colorado, on Philadelphus microphyllus. 

 Distribution : Colorado southwest into New Mexico and Arizona. 

 Illustrations : Bull. N. Y. Bot. Card. 7 : 459./. 21; pL 159 J. 61. 



20. Gymnosporangium effusum Kern, Bull. N. Y. Bot. 



Gard. 7: 459. 1911. 



O and I. Pycnia and aecia uncertain. 



On Malaceae ; 



Aronia sp., proven by culture as to host, but without maturing aecia. It is possible that 

 no. 22 may belong here. 



III. Telia caulicolous, from a perennial mycelium, usually appearing on branches 

 0.3-1.5 cm. in diameter, causing long slender fusiform enlargements 0.5-2.5 by 15-40 cm., 

 extending into and causing some swelling of the smaller branches and twigs arising from 

 the infected areas, sometimes on the larger trunks, usually breaking forth in series along 

 the branch with the grain of the wood, unevenly disposed, hypertrophied scars of previous 

 seasons frequently interspersed, when dry more or less wedge-shaped, but often irregular 

 and lacunose, sometimes forked or divided and staghorn-like, when mature and expanded 

 2-3 mm. broad by 2-5 mm. long at base, 7-10 mm. high, the surface more or less rugose, dark 

 chestnut-brown becoming cinnamon-brown after expansion ; teliospores 2-celled, oblong- 

 ellipsoid, 16-22 by 45-55 /x, rounded or slightly narrowed both above and below, slightly 

 constricted at the septum; wall dark cinnamon-brown, rather thin, 1-2/*, varying in thick- 

 ness on different spores, the pores 1 or 2 in each cell, near the septum ; pedicel hyaline, 

 cylindrical, uniform, 3-5 ju in diameter, very long. 



On Juniperaceae : 



Juniperus virginiana L., District of Columbia, New Jersey, New York, South Carolina. 

 Type locality: Santee Canal, South Carolina, on Juniperus virgimana. 

 Distribution : Along the Atlantic coast from New York south to South Carolina. 

 Illustration : Bull. N. Y. Bot. Gard. 7: pi. 159, J. 60. 



21. Gymnosporangium japonicum Sydow, Hedwigia 



Beibl. 38: 141. 1899. 



Roesielia koreaensis P. Henn. in Warb. Monsunia 1 : 5. 190(X 

 Tremella koreaensis Arth. Proc. Ind. Acad. Sci. 1900 : 136. 1901. 



0. Pycnia epiphyllous, gregarious, numerous, crowded in roundish groups 1-3 mm. 

 across, on discolored areas, prominent, punctiform, honey-yellow becoming blackish with age. 



1. Aecia hypophyllous, in crowded or somewhat annular groups, on thickened discol- 

 ored spots, cylindrical, 0.4-0.5 mm. in diameter by 2-3 mm. high ; peridium soon becoming 

 irregularly lacerate and cancellate often to base, erect or slightly spreading ; peridial cells 

 seen in both face and side views, broadly lanceolate or oval in face view, 29-32 by 64-90 m, 

 oblong in side view, 23-32 m thick, coarsely rugose on inner and side walls, the ridges 



