REPORT OF THE STATE BOTANIST I907 37 



Crataegus pruinosa K. Koch 



Verhandl. Preuss. Gart. Verein, neue Reihe i. 246 (1854). Sargent, 

 Silva N. Am. XIII. 61, t. 648; Man. 411, f. 331; Acad. Sci. Phila. Prcc. 

 585 (1905). 

 Buffalo, J. Dunbar (^2, 6 and 45), 1902-5. 



Crataegus arcana Beadle 



Bilt Bot. Studies i. 122 (1902). Sargent, Bot. Gazette XXXV. loi ; 

 Acad. Sci. Phila. Proc. 588 (1905). 



Niagara Falls, J. Dunbar and C. S. Sargent (^24), September 

 16, 1904; J. Dunbar, May 28, 1905; also eastern Pennsylvania to 

 western North Carolina. 



Crataegus gracilis n. sp. 



Leaves ovate, acuminate, rounded or abruptly cuneate at the broaa 

 entire base, sharply doubly serrate above, with straight glandular 

 teeth, and divided into 3 or 4 pairs of short acuminate lateral lobes ; 

 when they unfold deeply tinged with red and glabrous with the 

 exception of occasional caducous hairs along the upper side of the 

 midribs, nearly fully grown when the flowers open at the end of 

 ]\Iay and then membranaceous and dull yellow-green, and at matur- 

 ity subcoriaceous, dark blue-green, smooth and lustrous on the upper 

 surface, paler on the lower surface, 5-6 cm long and 3.5-4 cm wide, 

 with slender yellow midribs and 4 or 5 pairs of thin primary veins; 

 petioles slender, slightly wing-margined at the apex, glandular, with 

 occasional scattered dark glands, 8-10 mm long; stipules linear or 

 linear- falcate, glandular, fading rose color, deciduous; leaves on 

 vigorous shoots coriaceous, nearly triangular, mostly truncate at 

 the base, coarsely serrate, deeply lobed, often 8-9 cm long and 

 9-10 cm wide, with stout reddish midribs, broadly margined con- 

 spicuously glandular petioles 2-2.5 ^^'^'^ ^^^ length, and foliaceous 

 lunate coarsely serrate stipules. Flowers about 1.8 cm in diameter, 

 on long slender glabrous pedicels, in compact 6-io-flowered corymbs, 

 with linear glandular red bracts and bractlets ; calyx-tube broadly 

 obconic, glabrous, the lobes abruptly narrowed from broad bases, 

 slender, acuiuinate, glabrous, entire or occasionally minutely glandu- 

 lar toward the base ; stamens 20 ; anthers pale pink, filaments per- 

 sistent on the fruit; styles 3-5, surrounded at the base by tufts of 

 long pale hairs. P^ruit ripening late in September, on slender droc^p- 

 ing pedicels, in few-fruited clusters, depressed-globose, green tinged 

 with red or orange color, pruinosc, about i cm in diameter ; calyx 



