Part 3, 1912] ABCIDIACEAE 193 



closely spinulose, the inner and side walls thick, 9-14//, sculptured like the outer wall but with 

 longer papillae (up to 6 fj. long) ; aeciospores globoid or broadly ellipsoid, 22-25 by 26-31// ; 

 wall cinnamon-brown, 2-3// thick, finely verrucose, the pores distinct, 6-8, scattered. 



On Malaceae : 



Crataegus Tracy i A.sh.Q., Texas. 



III. Telia foliicolous, from an annual mycelium, scattered, tongue-shaped or conical, 

 small, 0.5-1 mm. thick by 1-1.5 mm. high, chestnut-brown ; teliospores 2-celled, ellipsoid, 

 18--23 by 45-55 //, rounded or slightly narrowed both above and below, slightly or not con- 

 stricted at the septum; wall pale cinnamon-brown, rather thin, about 1.5//, uniform, the 

 pores 2 in each cell near the septum ; pedicel hyaline, cylindrical, S-6 ij- in diameter, long. 

 On Juniperaceae : 



Juniperus mexicana Spreng. (/. sabinoides Nees, Cupressus sabinoides H.B.K.), Texas. 

 Juntperus pachyphlaea Torr. {Sabina pachyphlaea Ant.), Texas. 

 Juniperus virginiana I^. {Sabina virginiana Ant.), Texas. 

 Type locality : Fredericksburg, Texas, on Sabina virginiana 

 Illustrations : Bot. Gaz. 49 : pi. 22, f. 17; Bull. N. Y. Bot. Card. 7 : 442,/. 8. 

 Distribution : Central and western Texas. 

 EJxsicCATi : Barth. N. Am. Ured. 7. 



8. Gymnosporangium Davisii Kern, Bull. Torrey 



Club 35 : 507. 1908. 



0. Pycnia epiphyllous, numerous, gregarious, crowded in groups 1-2 mm. across, on 

 discolored areas 3-10 mm. across, prominent, conspicuous, punctiform, honey-yellow 

 becoming blackish-brown, slightly flatten ed-globoid, 160-185 /^ in diameter by 130-150// 

 high ; ostiolar filaments 30^5 // long. 



1. Aecia hypophyllous, crowded in irregular groups or rarely annular groups 1-4 mm. 

 across, on thickened discolored spots, cylindrical, acute at apex, 1.5-3 mm. high by 0.4-0.6 

 mm. in diameter ; peridium very tardily dehiscent at apex, finally becoming lacerate along 

 the sides ; peridial cells seen in both face and side views, not hygroscopic, remaining straight 

 when wet, broadly lanceolate in face yiew, 19-26 by 67-87 //, rhomboidal in side view, 

 22-32 /i thick, theouter wall rather thin, 1.5-2//, smooth, the inner and side walls rather thick, 

 5-8 /i, rather moderately rugose with closely set very narrow ridges of varying length; 

 aeciospores globoid, 19-25 by 23-27 // ; wall dark cinnamon-brown, rather thin, 1.5-2 //, rather 

 finely verrucose, the pores 8-10, scattered. 



On Malaceae : 



Aronia arbuiifolia (ly. f.) EH. {Pyrus arbutifolia I^. f.), Maine. 



Aronia airopurpurea Britton, Maine. 



Aronia nigra (Willd.) Koehne, Maine, Michigan, Wisconsin. 



III. Telia chiefly epiphyllous, occasionally on the small stems at the basesof the leaves, 

 from a perennial (?) mycelium, hemispherical, 0.5-1 mm. high, oval or oblong, 0.7-1 mm. 

 broad by 1-2 mm. long, light chocolate-brown, ruptured epidermis conspicuous ; teliospores 

 2-celled, broadly ellipsoid in general outline, 18-28 by 40-55 /i, usually narrowed below, 

 often attenuate at the apex and sometimes considerably enlarged near the septum in one or 

 two places on one or both cells owing to the presence of hyaline papillae over the germ- 

 pores, slightly or not constricted at the septum; wall cinnamon-brown, thin, 1-1.5 /i, 

 the papillae 4-7 //, the pores 1 or 2 in each cell, apical or near the septum ; pedicel cylindrical, 

 uniform, 3-5 // in diameter, moderately long. 



On Juniperaceae : .,, ^ ^, . „^. 



Tuniperus sibirica Burgsd. (/. nana Willd.), Maine, Wisconsin. _ 



Type locality : Wind Lake, Racine County, Wisconsin, on Juniperus sibirica. 

 Distribution: Maine to Wisconsin. 

 Illustrations: Bull. N. Y. Bot. Card. 7: 446,/. 13; pi. 154 J. 46. 



9. Gymnosporangium juvenescens Kern, Bull. N. Y. Bot. 



Gard. 7: 448. 1911. 



O Pycnia epiphyllous, numerous, gregarious, rather thickly crowded in groups 0.5-1.5 

 mm across, on discolored spots, rather conspicuous, honey-yellow becommg blackish- 

 brown globoid, 120-145 /i in diameter by 110-145// high ; ostiolar filaments 65-80/^ long. 



