Part 3, 1912] AECIDIACBAE; 209 



slightly downward, extending nearly across and becoming slightly broader, with a few 



solitary ridge-like papillae in the intervening spaces ; aeciospores angular- ellipsoid, 18-23 



by 23-29 m; wall chestnut-brown, 1.5-2.5ju thick, finely verrucose, the pores evident, 6-8, 

 scattered. 



On Malaceae : 



Crataegus spaihulata Michx., Alabama, Arkansas. 



Ill, Telia foliicolous and caulicolous, from an annual or biennial mycelium, appearing 

 on rather small, lobed, gall-like excrescences 3-10 mm. across or occasionally larger and 

 globoid or subreniform, usually numerous, rather evenly disposed, about 1-3 mm. apart, 

 sometimes few in a ray-like arrangement at right angles to the short axis of the gall, or 

 occasionally singly on small galls, conical or cylindrical-acuminate, becoming 1-1.5 mm. 

 broad at the base by 3-10 mm. long when fully mature, chestnut-brown becoming yellowish 

 and pulverulent by germination; teliospores 2-celled, narrowly ellipsoid, 15-19 by 39-50//, 

 rounded above and below, slightly or not constricted at the septum ; wall pale cinnamon- 

 brown, uniformly thin, 1-1.5 m, the pores 2 in each cell, near the septum; pedicel hyaline, 

 cylindrical, uniform, 3-6ju in diameter, very long. 



On Juniperaceae : 



Juniperus virginiana I^. {Sabina virginiana Ant.), Alabama, Florida, Mississippi, South 

 Carolina, Texas. 



Type locality : Auburn, Lee County, Alabama, on Sabina virginiana. 



Distribution : South Carolina and northern Florida westward to Arkansas and eastern Texas. 



Illustrations : Bot. Gaz. 49 : pi. 21, f, 3; Bull. N. Y. Bot. Card. 7 : 473, /. 34. 



KxsiccATi : Sydow, Ured. 1194. 



31. Gymnosporangium Juniperi-virginianae Schw. Schr. Nat, Ges. 



Leipzig 1 : 74. 1822. 



Gymnosporangium macropus Link, in Willd. Sp. PI. 6^ : 128. 1825. 



Gym.no sporangium, virginianum. Spreng. Syst. Veg. 4 : 562. 1827. 



Podisoma Juniperi-virginianae Fries, Syst. Myc. 3 : 507. 1832. 



Caeoma (Aecidium) pyratum Schw. Trans. Am. Phil. Soc. II. 4 : 294. 1832. 



Podisoma macropus Schw. Trans. Am. Phil. Soc. II. 4 : 307. 1832. 



Aecidium pyratum Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 



Roestelia penicillata Farl. Gymnosp. U. S. 30. 1880. 'i>iot R. penicillata Fries, 1849. 



Roestelia pyrata Thaxter, Proc. Am. Acad. 22 : 269. 1887. 



Puccinia macropus Kuntze, Rev. Gen. 3^ : 507. 1898. 



Puccinia Juniperi-virginianae Arth. Proc. Ind. Acad. Sci. 1898 : 186. 1899. 



Trem,ella Juniperi-virginianae Arth. Proc. Ind. Acad. Sci. 1900 : 135. 1901. 



Aecidium Juniperi-virginianae Arth. Result. Sci. Congr. Bot. Vienne 343. 1906. 



0. Pycnia epiphyllous, numerous, gregarious, more or less crowded in irregular groups 

 1-5 mm. across, on discolored spots 5-15 mm. across, prominent, conspicuous, punctiform, 

 honey-yellow becoming blackish, globoid, 110-125 ju in diameter by 110-130 ju high ; ostiolar 

 filaments 35-50 ju long. 



1. Aecia chiefly hypophyllous, crowded in annular groups 1.5-10 mm. across, on thick- 

 ened, discolored spots 5-15 mm. across, at first cylindrical, 1-2 mm. high, 0.1-0.4 mm. in 

 diameter ; peridium splitting extremely early and becoming very finely fimbriate to the 

 base, strongly revolute ; peridial cells usually seen only in side view, long and narrow, 10-16 

 by 65-100 M» hygroscopic, becoming strongly curved when wet, the outer wall moderately 

 thin, 2.5-3 /i, smooth, the inner wall coarselj^ rugose, moderately thick, 4-6 )u, the side walls 

 rather 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; aeciosporesgloboidorbroadly ellipsoid, 16-24 

 by 21-31 ix ; wall light chest nut- brown, moderately thick, 2-3 /x, finely verrucose, the pores 

 distinct, 8-10, scattered. 



On Malaceae : 



Malus angustifolia (Ait.) Michx. {Pyrus aiigustifolia Ait.), Alabama, Florida, Nebraska, 



North Carolina, South Carolina, Virginia. 



Malus baccata (L.) Desf. {Pyrus baccata L.), Maryland. 



Mains coronarta (L.) Mill. \Pyrus coronaria L-), Delaware, District of Columbia, Illinois, 

 Indiana, Iowa, Kansas, Maryland, Massachusetts, North Carolina, Ohio, Pennsyl- 

 vania, South Carolina, West Virginia, Wisconsin ; Ontario. 



Malus ioensis (Wood) Britton {Pyrus coronaria ioensis Wood, Pyrus ioensis Bailey), Ala- 

 bama, Connecticut, Illinois, Indiana, Iowa, Kansas, Missouri, Nebraska, New York, 

 Wisconsin. 



