CRATAEGUS IN MISSOURI. 57 



A tree sometimes 7 m. high, with a tall trunk 1.5-2 dm. in 

 diameter, covered with dark scaly bark, small erect branches 

 forming an open irregular head, and slender nearly straight 

 branchlets deeply tinged with red and marked by numerous 

 pale Icnticels when they first appear, becoming darker-colored 

 in their first season and light ashy gray the following year, 

 and armed with thin nearly straight purplish spines 3,5-4 

 cm. long. 



Swan Creek bottoms near Swan, Taney County, 5. F. Bush 

 (No. Q type), May 20 and October 7, 1907. 



17. Crataegus truncata, n, sp. 



Glabrous with the exception of a few hairs on the upper side of the mid- 

 ribs of the young leaves and on the calyx-lobes. Leaves oblong-obovate, 

 rounded, truncate and abruptly short-pointed or slightly obcordate at the 

 broad apex, or rarely aciuninate, gradually narrowed to the slender concave- 

 cuneate entire base, and finely glandular-serrate usually only above the 

 middle, with incurved glandular teeth; more than half-grown when the 

 flowers open from the 10th to the middle of May and then thin, yellow- 

 green and slightly villose along the midribs above and pale below, and at 

 maturity thin and firm to subcoriaceous, yellow-green and very lustrous 

 on the upper surface, pale yellow-green on the lower surface, 4-5 cm. 

 long and 2-3.5 cm. wide, with prominent pale yellow midribs, and thin 

 primary veins mostly within the parenchjTna; petioles slender, narrow- 

 wing-margined to below the middle, 5-7 mm. in length. Flowers about 

 1.5 cm. in diameter, on slender pedicels, in small compact 5-15-flowered 

 corymbs, the long lower peduncles from the axils of upper leaves; calyx- 

 tube narrowly obconic, the lobes slender, acuminate and glandular at the 

 apex, entire or slightly glandular-serrate near the middle, very sparingly 

 villose on the inner surface, reflexcd after anthesis; stamens 10 or some- 

 times 5-8; anthers yellow; styles 1 or 2, usually 2. Fruit ripening the 

 end of September, on long slender reddish drooping pedicels, in few- 

 fruited clusters, short-oblong to slightly obovate, rounded at the ends, 

 crimson, lustrous, marked by numerous pale dots, 1-2 cm. long, 8-10 mm. 

 in diameter; calyx little enlarged, with a deep narrow ca-vity, and small 

 spreading persistent lobes; flesh thin, green and dry; nutlets usually 2, 

 narrowed and rounded at the base, obovate and rounded at the broader 

 apex, slightly ridged on the back, 6-6.5 mm. long, and 3-3.5 mm. wide. 



A tree 8-12 m. high, with a trunk 7-15 cm. in diameter, 

 spreading branches forming a broad round-topped head, and 

 slender nearly straight branchlets light orange-brown and 

 marked by large pale lenticels when they first appear, becom- 

 ing light chestnut-brown and lustrous in their first season and 



