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60 MISSOURI BOTANICAL GARDEN 



A tree 5-G m. high, with a trunk 2-3 dm. in diameter, cov- 

 ered with dark scaly bark, spreading branches forming a wide 

 flat or round-topped head, and stout zigzag branchlets Hglit 

 orange-yellow when they first appear, becoming bright chest- 

 nut-red, very lustrous and marked by large pale lenticels in 

 their first season and light reddish brown the following 

 year^ and armed with many stout or slender ncarlv straight 



2-4 



and becoming compound 



Prairies near Webb C 



(No. 21 type) November 



Webb Citv, B. F. Busk 



J. Palmer, 

 Prosperity 



mens) E. J 



Palmer, Oct, 27, 1901, (No. 2, with 10-15 sta- 



Oct. 22, 1901, May 6, 1902; Joplin, Jasper County, E. J. 

 Palmer, (No. 3) Oct. 13, 1907; common. 



21. Crataegus parciflora, n, sp. 



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



broadly 



lyx-Iobes. Leaves 



gradually concave-cuneatc at the entire base, and finely doubly serrate 

 usually to below the middle, with straight glandular teeth; very thin and 

 conspicuously pale yellow when they unfold, not more than one-third 

 grown when the flowers open during the first week of May and then thin, 

 yellow-green above and pale bluish green below, and at maturity sub- 

 coriaceous, light yellow-green and lustrous on the upper surface, paler on 

 the lower surface, 4-5 cm. long and 3-4.5 cm. wide, with prominent yellow 

 midribs, and very thin prominent primary veins; petioles slender, narrow- 

 wing-margined to below the middle, often rose-colored in the autumn, 

 1-1.2 cm. in length; leaves on vigorous shoots coriaceous, ovate or oval, 

 rounded or acute and short-pointed at the apex, abruptly cuneate at the 

 base, coarsely serrate, occasionally slightly lobed, often 5.5-6 cm. long 

 and nearly as broad. Flowers L4-1.5 cm. in diameter, on slender pedicels, 

 in mostly only 5- or G-fiowercd corymbs, the lower peduncles from the 

 nxils of upper leaves; calyx-txibe narrowly obconic, the lobes slender, 

 acuminate, entire or minutely glandular-serrate, villose on the inner 

 surface, reflexed after anthesis; stamens 20; anthers rose color; styles 3-5. 

 Fruit ripening the end of October, on slender drooping pedicels, in usually 

 2-5-flowered clusters, short-oblong, full and rounded at the ends, pale 

 cherry-red, marked by large dark dots, 9-10 mm. long and 8-9 mm, in 

 diameter; calj^ little enlarged, with a broad shallow cavity, and spreading 

 sometimes slightly incurved persistent lobes; flesh thin, yellow-green, dry 



