8 JOURNAL OF THE ARXOLD ARBORETUM [vol. in 



chusetts, which differs from this Missouri and Arkansas species in its 



larger more coarsely serrate leaves more deeply divided into acuminate 



lobes, in its broad many-flowered less densely villose corymbs and pyri- 

 form fruit. 



Crataegus brachyphylla (§Molles), n. sp. 



Leaves broad-ovate, acute or rounded at apex, truncate or rounded 

 at the wide base, coarsely often doubly serrate with straight acuminate 

 teeth, covered above when they unfold with short hairs and below with 

 long matted white hairs persistent during the season, and at maturity 

 thin, yellow-green and glabrous on the upper surface, 5-7 cm. long and 

 5-6 cm. wide, with a slender midrib and primary veins; petioles slender, 

 thickly covered with matted white hairs early in the season, becoming 

 glabrous or nearly glabrous before autumn, 2-3 cm. in length; leaves on 

 vigorous shoots rounded at apex, cordate at the broad base, slightly and 

 irregularly laterally lobed, coarsely doubly serrate and up to 6-8 cm. 

 long and wide, with petioles 2-3 cm. in length. Flowers 1.5 cm. in di- 

 ameter, appearing from the first to the tenth of April when the leaves 

 are more than half grown, in small compact 5-8-flowered corymbs densely 

 covered, like the slender pedicels and narrow obconic calyx-tube, with 

 long matted snow w r hite hairs; calyx-lobes narrow, long-acuminate, 

 laciniately glandular-serrate, thickly covered with white hairs; stamens 

 20, anthers deep rose color. Fruit ripening early in September, on 

 slightly villose pedicils, in erect clusters, subglobose, dull dark red, 10- 

 12 mm. in diameter, with thin flesh, the calyx little enlarged, with a deep 

 narrow cavity pointed in the bottom; nutlets usually 3, acute at base, 

 rounded at the broader apex, only slightly ridged on the back, 6-7 mm. 

 long and 3-4 mm. wide, the broad hypostyle extending to the middle. 



A tree 6-7 m. high, with a trunk 15-18 cm. in diameter, spreading 



branches forming an open irregular head, and slender nearly straight 



branchlets thickly covered with white hairs when they first appear, nearly 



glabrous, bright red-brown and lustrous at the end of their first season 



and pale gray the following year, and armed with occasional straight or 



slightly curved spines 3-4 cm. long and often unarmed. 



Akkansas. Hempstead County, dry gravelly ridges in the shade of open 

 woods largely composed of Quercus Durandii Buckley and Q. arkemsana Sargent 

 about five miles northwest of Fulton, C. S. Sargent, April, 22, 1901; B. F. Bush, 

 No. 151, April 23, 1901, No. 19A, April 20, 1905, No. 5933, October 4, 1909; E. 

 J. Palmer, No. 7205 (21), April 12, 1915 (type), No. 3975 (21b), October 19, 

 1915, No. 9392 (21) and No. 10607 (21), April 8 and September 5, 1916, Nos. 

 16333 and 16340, September 9, 1919. 



This is one of the most distinct species of the Molles Group, differing 

 from the other described species in its comparatively small leaves with- 

 out lobes except on vigorous shoots, small flowers in small few-flowered 

 corymbs, and small fruit. It is unusual, too, to find a tree of this group 

 growing on dry gravelly hills. In the shape of its leaves and their pu- 

 bescence it resembles C lanuainosa Sanrent from southwestern Missouri, 



