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VOLUME XXXV 



NUMBER b 



Botanical Gazette 



/[/N£, igoj 



CRATAEGUS IN NORTHEASTERN ILLINOIS. 



C. S. S A RGENT. 



This paper is based chiefly on the large collections and on 

 the notes made in the neighborhood of Chicago, by Mr. E. J. 

 Hill, of that city, during the last four years. Mr. William C. 

 Egan, of Lake Forest, Mr. Robert Bebb, of Chicago, Mr. H. 

 C. Skeels, of Joliet, and Mr. B. T. Gault, of Glen Ellyn, have 

 also made important collections of Crataegus in this region. 

 The field, however, is by no means exhausted, and there are 



[ indications in all these collections of forms which cannot now be 



\ described for want of fuller information. 



CRUS-GALLI. 



Stamens lo, 



■ 



Anthers rose color. 



Crataegus Peoriensis Sargent, Bot. Gaz. 31:5. 1901; Silva 



f N. Am. 13:45.//. 640. 



Joliet, E. J. mn, ]nnt and October 1901, May and September 1902 ; 



H. C. Skeeh, May igo2. 



Anthers pale yellow. 



Crataegus Arduennae,n.sp. — Glabrous. Leaves obovate, acute, 

 acuminate or rounded at the apex, gradually narrowed from near 

 the middle to the entire cuneate base, finely crenately serrate 

 above, with glandular teeth; deeply tinged with red as they unfold 

 i and nearly fully grown when the flowers open; at maturity sub- 



coriaceous, dark green and very lustrous on the upper surface, 

 pale on the lower surface, 4.5-6^'" long, 1.5-3'" wide, with slender 

 yellow midribs and obscure primary veins mostly within the 



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