72 MISSOURI BOTANICAL GARDEN. • 



straight or slightly curved purple shining ultimately gray 



spines 3-C cm. long. 



Woods and the gravelly banks of small streams near 

 Monteer, Shannon County, B. F. Bush (No. 2 type), May 11 

 and Oct. 8, 1905, (No. 2 A) Oct. 5, 1905, April 28, 1907, (No. 

 2 C)May 12 and Oct. 3, 1905, April 29, 1907, (No. 2 D) ^ 



May 26, 1907, (No. 2 E) Oct. 7, 1905, (No. 4) May 12 and 

 August 19, 1901, (No. 4 D) August 20, 1901. 



36. Crataegus erecta Sargent, Bot. Gazette, xxxi. 218 



(1901) ; Silva N. Am. xiii. 49, t. 042; Manual, 375, f. 293. 

 Mississippi River bottoms. East St. Louis to Fish Lake, 



Illinois. 



Crataegus insignis Sargent 



t. 54 (1903). 



Cahokia 



Norton and J. H. Kellogg 

 . J. H. KelloQQ, (No. 2 A; 



1902-1903. 



38. Crataegus setosa, n. sp. 



Leaves oblong-obovate, acuminate and short-pointed or occasionally 

 rounded at the apex, gradually narrowed to the slender entire base, and 

 finely serrate usually only above the middle, with straight or incurved 

 glandular teeth ; nearly fully grown when the flowers open during the first 

 week of May and then thin, yellow-green and setose above, and pale and 

 slightly villose along the midribs and veins below, and at maturity thin 

 but firm in texture, yellow-green, smooth and lustrous on the upper sur- 

 face and paler and nearly glabrous on the lower surface, 3-4 cm. long and 

 1.5-2.5 cm. wide, with slender yellow midribs, and thin primary veins 

 mostly within the parenchyma; petioles slender, narrow-wing-margined, 

 villose while young, becoming glabrous, 5-6 mm. in length ; leaves on vigor- 

 ous shoots thicker, oval to shghtly obovate, abruptly long-pointed, more 

 coarsely serrate and often 4-5 cm. long, with foliaceous falcate glandular- 

 serrate stipules. Flowers 1.2-1.3 cm. in diameter, on slender pedicels 

 covered with long white hairs, in compact shghtly hairy mostly 6-8- 

 flowered corymbs, the long slender lower peduncles from the axils of upper 

 leaves; calyx-tube narrowly obconic, glabrous, the lobes slender, acuminate, 

 entire or minutely glandular-dentate, glabrous on the outer, sparingly 

 villose on the inner surface, reflexed after anthesis; stamens 10; anthers 

 rose color; styles 2-4. Fruit ripening early in October, on slender droop- 

 ing glabrous pedicels, in few-fruited clusters, subglobose or slightly longer 

 than broad, crimson, lustrous, marked by large pale dots, 9-10 mm. in 



