90 NEW YORK STATE MUSEUM 



zigzag branchlets dark orange-green and marked by pale lenti- 

 cels when they first appear, becoming light chestnut-brown and 

 lustrous at the end of their first season and dull gray-brown the 

 following year, and armed with stout slightly curved chestnut- 

 brown shining spines 3.5 to 4 cm long. 



On clay soil north of Hemlock lake in the town of Richmond, 

 Livingston county. Henry T. Brown (no. 136, type), September 

 27, 1907; May 30, 1908. 



Crataegus maineana Sargent 



Proc. Rochester Acad. Sci. 4. 106 (1903); N. Y. State Mus. Bui. 122. 

 46 (1908). 



Hemlock lake, Rochester, Belfast and Bufi^alo. 



Crataegus opulens Sargent 

 Proc. Rochester Acad. Sci. IV. 104 (1903). 

 Near Herkimer, Coopers Plains, Belfast, Hemlock lake, 

 Rochester, Brighton, Buffalo; also in southeastern Michigan. 



Crataegus perspicabilis n. sp. 

 Glabrous with the exception of the hairs on the young leaves 

 and calyx-lobes. Leaves ovate, acuminate, rounded or abruptly 

 cuneate at the broad base, coarsely doubly serrate with straight 

 glandular teeth, and slightly divided into four or five pairs of 

 short, broad, lateral lobes ; more than half-grown when the 

 flowers open from the 20th to the end of May, and then thin, 

 yellow-green and sparingly furnished above with short white hairs 

 and paler below, and at maturity thin but firm in texture, 

 blue-green on the upper surface, pale blue-green on the lower 

 surface, 5-7 cm long and 5-6 cm Avide, with slender midribs and 

 primary veins ; petioles slender, slightly hairy on the upper side 

 while young, soon becoming glabrous, glandular with occasional 

 minute persistent glands, 3 to 3.5 cm in length ; leaves on vigor- 

 ous shoots ovate, acuminate, rounded, truncate or slightly ob- 

 cordate at the wide base, thicker, more deeply lobed, coarsely 

 serrate, often 10 to 11 cm long and broad, their petioles stout, 

 glandular with prominent stipitate persistent glands. Flowers 

 on long slender pedicels, in narrow mostly 4-10-flowered 

 corymbs, the elongated lower peduncles from the axils of upper 

 leaves ; calyx-tube narrowly obconic, the lobes gradually nar- 

 rowed from wide bases, long, slender, acuminate, ciliate or 



