190 NORTH AMERICAN FLORA [V01.UMK 7 



Telia cristiform, orange-yellow. 19. G. gracilens. 



Telia wedge-shaped, often irregular and lacunose. 



Teliospores moderately small (42-55 /i). 20. G. effusum. 



Teliospores rather large (57-66 u). 21. G.japonicum. 



Telia terete. -^ 



Telia stout; teliospores 2-celled. 23. G . clavariaeforme . 



Telia slender ; teliospores 2-5-celled. 24. G^. Ellisii. 



Telia appearing on galls or gall-like excrescences. 



Galls very irregular, usually elongate and knot-like, often in 



succession along a branch. 25. G. Betheli. 



Galls globoid or reniform. 

 Telia laterally compressed. 



Telia thick, wedge-shaped, chestnut-brown. 26. G. globosum, 



Telia thin, irregularly flattened, light chestnut-brown. 28. G. Nelsoni. 



Telia terete. 



Telia somewhat conical, chestnut-brown. 



Teliospore-wall with slight hyaline thickenings over the 



germ-pores. 29. G. corniculans. 



Teliospore-wall uniform, without hyaline thickenings. 30. G.fioriforme. 

 Telia c;^lindrical or cylindrical-acuminate, golden-brown. 31. G . Juniperi-virginianae . 

 Telia pulvinate, low, inconspicuous. 32. G. bermudianum . 



1. Gymaosporangium Blasdaleanum (Dietel & Holway) Kern, Bull. 



N. Y. Bot. Gard. 7 : 437. 1911. 



Aecidium Blasdaleanum Dietel & Holway, Krythea 3 : 77. 1895. 

 Phragmidium LibocedriV. Henn. Hedwigia37: 271. 1898. 

 1 Aecidium. Pourthiaeae Sydow, M^m. Herb. Boiss. 4: 3. 1900. 

 Gym.no sporangium, auraniiacum Sydow, Ann. Myc. 2 : 28. 1904. 

 Gytnnosporangium Libocedri Kern, Bull. Torrey Club 35 : 509. 1908. 



0. Pycnia chiefly hypophyllous, gregarious, usually few in small groups 0.5-1.5 mm. 

 across, punctiform, not conspicuous, honey-yellow, conical or flask-shaped, 100-130^ in 

 diameter by 80-120 /^ high ; ostiolar filaments 75-100^ long- 



1. Aecia hypophyllous and fructicolous, in crowded groups 1-5 mm. across, cupulate, 

 low, 0.2-0.3 mm. in diameter ; peridium delicate, margin lacerate, spreading or somewhat 

 recurved; peridial cells rhomboidal in side view, 18-23 /* long, the outer wall 3-4 //thick, 

 transversely striate, smooth, the inner and side walls about half as thick, verrucose ; 

 aeciospores globoid, 12-20 by 14-23/^; wall pale-yellow, rather thin, 1-1.5//, finely verrucose. 



On Malaceae : 



Am-elanchier alnifolia Nutt., California, Oregon. 



Amelanchier Jlorida I^indl., Oregon. 



Am.elanchier pallida Greene, California. 



Crataegus Douglasii\,\n6X. \C. brevispina Dougl.), California, Oregon. 



Crataegus rivularis Nutt., California. 



III. Telia foliicolous, from an annual mycelium, not causing noticeable distortions, 

 scattered, roundish-oval, about 0.8-1.5 mm. across, pulvinate, reddish-brown, ruptured 

 epidermis not noticeable; teliospores 2-5-celled, linear-oblong, 19-30 by 35-87//, slightly 

 constricted at the septa ; wall pale-brown, thin, 1//, the pores 1 in the upper cell, 2 in the 

 other cells, apical ; pedicels cylindrical, often large, 7-25// in diameter. 



On Juniperaceae : 



Heyderia decurrejis (Terr.) K. Koch {Libocedrus decurrens Torr.), California, Oregon. 

 Type locality : Shasta Springs, Siskiyou County, California, on Crataegus rivularis. 

 Distribution ; Pacific slope from northern California northward into Oregon ; possibly also 



in Japan. 



Illustrations : Bull. N. Y. Bot. Gard. 7 : 438,/. 2; pi. 154, f. 44. 

 Exsiccati: Sydow, Ured. 1149, 1786; Ellis & Ev. N. Am. Fungi J2^. 



2. Gymnosporangium Sorbi (Arth.) Kern, Bull. N. Y. Bot. 



Gard. 7 : 438. 1911. 



Aecidium Sorbi Arth. Bull. Torrey Club 33 : 521. 1906. 



0. Pycnia epiphyllous, numerous, gregarious, in small groups on discolored areas, 

 noticeable, subepidermal, honey-yellow becoming brownish, conoidal, 110-130 /^ in diameter, 

 70-80 ji high ; ostiolar filaments 30-45 }i long. 



1. Aecia hypophyllous, numerous, gregarious, in small groups of 4 to 7, arising from 

 slight swellings on discolored spots, or often more numerous on larger swellings on the 

 veins or rachis, cupulate, 0.2-0.4 mm. high by 0.2-0.3 mm. in diameter; peridium color- 



