Part 3, 1912] AECIDIACBAE 205 



becoming blackish, slightly flattened, globose, 150-190 ju in diameter by 115-175 ju high ; 

 ostiolar filaments 65-80 /n long. 



I. Aecia chiefly hypopliyllous, crowded in irregular, or rarely annular groups 2-7 mm. 

 across, on thickened, discolored spots 3-12 mm. across, cylindrical, 1.5-3 mm. high by 0.1- 

 0.2 mm. in diameter ; peridium soon splitting in the upper part, becoming reticulose half 

 way to the base, the margin finely lacerate or fimbriate, erect; peridial cells seen in both face 

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

 view, 15-23- by 60-90 m, Hnear-rhomboidal in side view, 13-19 m thick, the outer wall rather 

 thin, about 1.5ju, smooth, the inner and side walls moderately thick, 3-5 m, rather densely 

 rugose with ridges of varying length ; aeciospores globoid or broadly ellipsoid, 15-19 by 

 18-25 M ; wall light chestnut-brown, 1.5-2 m thick, finely verrucose, the pores distinct, 6-8, 

 scattered. 



On Malaceae : 



Crataegus acutiloba Sarg., New York, Vermont. 



Crataegus ancisa Beadle, Alabama. 



Crataegus anomala Sarg., Connecticut. 



Crataegus apposita Bissellii Kggl., Connecticut. 



Crataegus arcuata Ashe, Pennsylvania. 



Crataegus asperifolia Sarg., Vermont. 



Crataegus biltmoreana Beadle, Missouri. 



Crataegus Boyntoni Beadle, North Carolina. 



Crataegus Brainerdi Sarg., Vermont. •> 



Crataegus Buckleyi Beadle, North Carolina, 



Crataegus champ lainensis Sarg. , New York. 



Crataegus Chaptnani Ashe, North Carolina. 



Crataegus cocctnea I^. (C. modesta Sarg.), Connecticut, Illinois, Indiana, Massachusetts, 



New York, Vermont. 

 Crataegus coccinioides Ashe, Missouri. 



Crataegus coccinioides dilataia (Sarg.) Eggl., Massachusetts, New York, Vermont. 

 Crataegus cottina Chapm., Georgia, Virginia. 

 Crataegus colorata Sarg., Ontario. 



Crataegus conjuncta Sarg., Connecticut, Massachusetts. 

 Crataegus conspicua Sarg., Vermont. 

 Crataegus consueta Sarg., Missouri. 



Crataegus corusca Sarg., Illinois. 



Crataegus Crus-galli Iv., Kentucky, Massachusetts, Missouri, North Carolina, Tennessee, 



Virginia. 

 Crataegus cyclop hylla Sarg., Vermont. 

 Crataegus decorata Sarg., Missouri. 

 Crataegus delecta Sarg., Illinois. 

 Crataegus delectabilis Sarg., Ontario. 

 Crataegus delucida Sarg., Vermont. 

 Crataegus demissa Sarg., Massachusetts, Vermont. 

 Crataegus disjuncta Sarg., Missouri. 

 Crataegus dispar Beadle, South Carolina. 

 Crataegus dispessa Ashe (C pyriformis Britton), Missouri. 

 Crataegus dissimilis Sarg., Connecticut. 



Crataegus dissona Sarg., Massachusetts, New Hampshire, New York. 

 Crataegus dumetosa Sarg., Missouri. 

 Crataegus Eamesi Sarg., Connecticut. 

 Crataegus Edsoni Sarg., New Hampshire, Vermont. 

 Crataegus Egglesioni Sarg., New York, Vermont. 

 Crataegus Engelmanni Sarg., Missouri. 

 Crataegus f estiva Sarg., Connecticut. 

 Crataegus Forbesae Sarg., Connecticut. 

 Crataegus f re talis Sarg., Connecticut. 

 Crataegus genialis S^r%., Vermont. _ 

 Crataegus glaucophylla Sarg., Connecticut, New York. 



rra/fl<fp-M.y//^r6/jo«2 Beadle, Tennessee. .- . -vt ^r i tt 



Crataegus Holmesiana Ashe (C tenuifolia Britton), Connecticut, New York, Vermont. 

 Crataegus lasiantha Sarg., Missouri. 



%llfgus X;'^^f.K^^^^^^^^ New York, South Dakota, West Virginia, 



' Craiaeg^ul^macracantha succulenta (Schrad.) Eggl., Wisconsin. 

 Crataegus Margaretta Ashe, Iowa, Missouri. 

 Crataegus McGeeae Ashe, Iowa. 

 Crataegus membranacea Sarg., Vermont. 



'cTataJ.Z "^L ?T.'"&' aricheele, Illinois, Indiana, Iowa, Kansas, Kentucky, Massa- 



chusetts, Missouri, Nebraska, Ohio. ^ 

 Crataegus neo-londinensis Sarg., Connecticut. 

 Crataegus Peckietta Sarg., New York. 



