198 NORTH AMERICAN FLORA [Voi^UM^ 7 



Crataegus dispar Beadle, Soutli Carolina. 



Crataegus flava Ait., Alabama, Florida, Soutli Carolina. 



Crataegus Jonesae Sq-t^., Maine. 



Crataegus mollis (T. & G.) Scheele, Illinois, Indiana. 



Crataegus Phaenopyrum (I,, f.) Medic. (C cordata Ait.), Tennessee. 



Crataegus punctata Jacq., New York, North Carolina; Ontario. 



Crataegus Reverchoni Sarg^., Texas. 



Crataegus rotundifolia Moench, Maine. New York. 



Crataegus spathulata Michx., Alabama, North Carolina, South Carolina, Tennessee. 



Crataegus sp., Arkansas, Louisiana, New Jersey. " 



Cydonia vulgaris (L.) Pers. {Pyrus vulgaris L-), Alabama, Connecticut, Delaware, Maine, 



Maryland, Massachusetts, Michigan, Mississippi, New York, Vermont. 

 Malus Malus (L-) Britton {Pyrus Malus L-). Massachusetts. 



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

 swellings, usually aggregated, roundish, 1-4 mm. across, often confluent, hemispherical, 

 1-3 mm. high, orange-brown ; teliospores 2-celled, ellipsoid, 18-26 by 35-51 m, roundish or 

 somewhat acutish *above, obtuse below, slightly or not constricted at the septum ; wall 

 yellowish, thin, 1-2 ;Lt, slightly thicker at apex, 2-3 ju, the pores 1 in each cell, apical in the 

 upper, near the pedicel in the lower cell ; pedicels carotiform, 9-19 ju in diameter near the 

 spore, very long. 



On Juniperaceae : 



Juniperus communis L-, Maine, Massachusetts. 



Juniperus sibirica Burgsd. {J. nana Willd.), Illinois, Michigan, New York, Wisconsin. 



Juniperus virginiana L- {Sabina virginiana Ant.), Alabama, Connecticut, Delaware, 

 District of Columbia, Iowa, Kentucky, Maryland, Massachusetts, Mississippi, New 

 Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, 

 Virginia. 



Type locality : Philadelphia, Pennsylvania, " in germinibus Rosae," error for Crataegus sp. 



Distribution : From Maine west to northern peninsula of Michigan and to Iowa, south to 

 Texas and northern Florida. 



Illustrations : Hedwigia 34 : 3, /. 7; Bot. Gaz. 49: pi. 21, f. 9 ; Bull. N. Y. Bot. Card. 7: 

 455, /. 19 ; pi. 155,/. 50, 51. 



Kxsiccati : Seym. & Earle, Econ. Vun^i 234, 235, 236, 237 (in part), 238; Rav. Fungi Am. 271, 

 272, 502 ; Ellis, N. Am. Fungi 1083a, 1084a, b ; Ellis & Ev. N. Am. Fungi 2224; Ellis & Ev. Fungi 

 Columb. J^, 1732; Thiim. Myc. Univ. 44; Kellerm. Ohio Fungi ^i. 



16. Gymnosporangium cornutum (Pers.) Arth. 



Mycologia 1 : 240. 1909. 



Aecidium cornutum Pers. in J. F. Gmel. Syst. Nat. 2 : 1472. 1791. 



Caeoma cornutum Schlecht. Fl. Berol. 2 : 111. 1824. 



Caeoma cylindrttes Link, in Willd. Sp. PI. &^ : 64. 1825. 



Gymnosporangium Jun-iperi Link, in Willd. Sp. PI. 6^ ; 127. 1825. 



Cefitridium Sorbi Chev. Fl. Paris 1 : 383. 1826. 



Gym^no sporangium, aurantiacum Chev. Fl. Paris 1 : 424. 1826. 



Roestelia cornuta Fries, Summa Veg. Scand. 510. 1849. 



Ceratitium cornutum Rab. Bot. Zeit. 9 : 452. 1851. 



Podisoma juniperinum Oerst. Overs. Danske Vid. Selsk. Forh. 1866: 191. 1866. 



0. Pycnia epiphyllous, numerous, gregarious, crowded in groups 1.5-5 mm. across, on 

 discolored areas 3-15 mm. across, prominent, conspicuous, punctiform, honey-yellow be- 

 coming blackish-brown. 



1. Aecia chiefly hypophyllous, crowded in irregular or often annular groups 3-10 mm. 



across, on larger thickened, discolored areas, cylindrical, somewhat attenuate above, acute 



at apex, 3-5 mm. high, 0.4-0.6 mm. in diameter; peridium rupturing rather tardily at 



apex, becoming somewhat but not deeply lacerate; peridial cells seen in both face and side 



views, not hygroscopic, remaining straight when wet, broadly lanceolate in face view, 



19-29 by 60-110 ju, rhomboidal in side view, 30-35 )u thick, the outer wall rather thin, about 



2/x, smooth, the inner and side walls thick, 8-12 ju, rather coarsely rugose with short 



ridge-like papillae; aeciospores globoid, 18-25 by 21-29 ;Lt; wall light chestnut-brown, 



moderately thin, 2-2.5jLt, rather finely verrucose, the pores 8-10, scattered. 



On Malaceae : 



Sorbus americana Marsh., Maine, Michigan, New Hampshire, New York ; Newfoundland, 



Ontario. 

 Sorbus Aucuparia L-, Michigan. 

 Sorbus scopulina Greene {S. sambucifolia A. Gray, not Cham. & Schlecht.), Colorado, 



Maine, Wisconsin, Wyoming; Greenland, Ontario, Quebec. 



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

 fusiform enlargements of the smaller woody branches, occasionally also on the leaves, 



