^^6 NORTH AMERICAN FLORA LV01.UME 7 



0. Pycnia epiphyllous, few, gregarious, in small groups 0.7-1.5 mm. across, puncti- 

 form, honey-yellow becoming blackish, conical, 128-190 /v in diameter by 64-112 yu high ; osti- 

 olar filaments 30-65 ;« long. 



1. Aecia hypophyllous, few, usually aggregated in groups of 2-8, rarely solitary, borne 

 in galMike, pyriform protuberances 1-1.5 mm. in diameter by 1.5-3 mm. high, cylindrical, 

 0.5-0.8 mm. in diameter by 2-4 mm. high ; peridium soon becoming finely cancellate, not 

 dehiscent at apex ; peridial cells cylindrical, long and narrow, hypha-like, 9-14^ in diameter 

 by 145-190// long, often irregularly bent, the outer, inner, and side walls of equal thickness, 

 about 1.5-2 /i, whole surface smooth; aeciospores globoid, small, 15-17 by 16-22//; wall 

 dark cinnamon-brown, 2.5-3// thick, moderately verrucose, the pores obscure, numerous, 

 scattered. 



On Malaceae : 



Amelanchier canadensis (L.) Medic. {A. Boiryapium DC, Aronia Botryapium Pers.), 



Connecticut, Massachusetts, New Jersey, Pennsylvania. 



Amelanchier intermedia Spach {A. Botryapium Hook, not DC), Massachusetts, New 

 Jersey. 



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

 scattered, oval or irregular, about 1.5-3 mm. wide by 2-7 mm. long, often confluent, hemi- 

 spherical, 3-5 mm. or more high, chestnut-brown when fully mature, becoming rugose and 

 light-yellow by germination ; teliospores 2-4-celled, linear-oblong, 13-19 by 35-77 //, usually 

 rounded above, somewhat narrowed below, slightly constricted at the septa ; wall pale- 

 yellow, about 1-1.5// thick, the pores 2 in each cell, near the septa; pedicel cylindrical, 

 uniform, 5-6;" in diameter, very long. 



On Juniperaceae : 



Chamaecyparis thyoides (Tv.) B.S.P. (C sphaeroidea Spach., Cupressus thyoides I,.), 

 Alabama, Connecticut, Delaware, Massachusetts, New Jersey. 



Type locality : Bethlehem, Pennsylvania, on Aronia Botryapium {Am.elanchier canadensis) 



Distribution : Along the Atlantic coast from Massachusetts to New Jersey and Pennsylvania 

 and in sotithern Alabama. 



Illustrations: Hedwigia 34 : 3,f. 10; Farl. Gymnosp. IT. S. pi. 2,f. 18-21; Bot. Gaz. 49 

 pi. 22, f. 12 ; Bull. N. Y. Bot. Gard. 7: 452,/. 17; pi. 155, f. 48. 



ExsiCCATi: Seym. & E;arle, Bcon. Fungi 2^J, 2^5 ; Rab.-Wint. Fungi Eur. 2922; Ellis, N 

 Am. Fungi 272, 1087 ; Ellis & Ev. Fungi Columb. 1075; Thiim. Myc. Univ. 431; Roum. Fungi 

 Sel. 4514. 



14. Gymnosporangium Nidus-avis Thaxter, Bull. Conn. Exp. 



Sta. 107 : 3. 1891. 



Gym,no sporangium, conicum Farl. Gymnosp. U. S. 23. 1880. Not G. conicum. Hedw. f. 1805. 



Roestelia Nidus-avis Thaxter, Bull. Conn. Exp, Sta. 107 : 5. 1891. 



Puccinia Nidus-avis Kuntze, Rev. Gen. 3^ ; 507. 1898. 



Tremelta Nidus-avis Arth. Proc. Ind. Acad. Sci. 1900 : 136. 1901. 



Aecidium Nidus-avis Farl. Bibl. Index 1 : 68. 1905. 



0. Pycnia fructicolous and epiphyllous, gregarious, in small groups on slightly hyper- 

 trophied areas, noticeable, punctiform, honey-yellow becoming blackish, flattened -globoid, 

 120-155 fJ- in diameter by 80-112 /i high ; ostiolar filaments 45-65 fi long. 



1. Aecia amphigenous, especially fructicolous and caulicolous, aggregated on hyper- 

 trophied areas 2-5 mm. across on the leaves, occupying part or all of the surface on the 

 fruits, cylindrical, 2-4 mm. high by 0.4-0.7 mm. in diameter ; peridium soon becoming irregu- 

 larly lacerate, usually to base, slightly spreading ; peridial cells seen in both face and side 

 views , not hygroscopic, remaining straight when wet, lanceolate in face view, 15-23 by 55-88/i, 

 linear in side view, 14-18 // thick, the outer wall rather thin, 1-1.5 /i, smooth, the inner 

 and side walls moderately thick, 5-7 /i, coarsely rugose with rather narrow ridges with sepa- 

 rate roundish or elongate ridge-like papillae interspersed ; aeciospores globoid or broadly 

 ellipsoid, 18-23 by 23-28^ ; wall cinnamon-brown, rather thick, 2.5-4 /i, very finely verru- 

 cose, appearing almost smooth when wet, the pores 8-10, scattered. 



On Malaceae : 



Amelanchier canadensis (L.) Medic. {A. Botryapium. DC), Connecticut, Illinois, Iowa, 

 Massachusetts, North Carolina, Vermont, "Wisconsin. 



Am.elanchier erecta Blanchard, Ohio. 



Amelanchier intermedia Spach {A. Boiryapium Hook, not DC), Connecticut, Massachu- 

 setts, New York, Pennsylvania; Ontario. 



Amelanchier oblongifolia (T. &G.) Roem,, Massachusetts. 



Amelanchier vulgaris Moench (cultivated), Massachusetts. 



Cydoni a vulgaris (I^.) Pers., Connecticut. 



