1922] SARGENT, NOTES ON NORTH AMERICAN TREES, X. 187 



Crataegus abbreviata (§ Virides), n. sp. 



Leaves ovate to obovate, elliptic or suborbicular, acute or rounded and 

 abruptly short-pointed at apex, narrowed and cuneate or rounded at base, 

 sharply often doubly glandular-serrate usually only above the middle, 

 and often slightly divided usually toward the apex into short acute lobes; 

 covered above when they unfold with short white hairs and densely 

 tomentose below, fully grown when the flowers open and then glabrous 

 with the exception of a few hairs along the upper side of the midrib, and 

 of small axillary tufts below, and at maturity thin, yellow-green, glabrous, 

 and 2.5-3 cm. long and 2-2.5 cm. wide, often appearing 3-nerved by the 

 greater prominence of the lowest pair of primary veins; petioles slender, 

 slightly villose-pubescent early in the season, soon becoming glabrous; 

 leaves on vigorous shoots broad-ovate to semiorbicular or elliptic, rounded 

 or acuminate at apex, rounded or cuneate at base, often laterally lobed, 

 4-5 cm. long and broad. Flowers opening early in April, 1.8-2 cm. in 

 diameter, in slightly villose compact usually 10-15-flowered corymbs 

 crowded on the branches; calyx-tube broad-obconic, slightly villose, the 

 lobes short, entire, often slightly villose or glabrous on the outer surface, 

 villose on the inner surface, mostly deciduous from the ripe fruit; stamens 

 20; anthers yellow; styles 4 or 5. Fruit ripening early in October, on 

 slightly villose pedicels, in lax drooping clusters, subglobose, dark red, 

 6-8 mm. in diameter, with thin succulent flesh, the calyx little enlarged, 

 with a deep cavity broad in the bottom; nutlets 4 or 5, rounded at the ends, 

 broader at the apex than at the base, slightly grooved on the back, 3-4 

 mm. long, the narrow hypostyle extending to the middle. 



A tree 5-5.5 m. high, with a small stem and slender nearly straight 

 branchlets slightly villose when they first appear, dark orange-brown and 

 glabrous or nearly glabrous when the flowers open, and gray-brown in 

 their second year, and unarmed or furnished with occasional slender 

 straight spines 3-4 cm. in length. 



Texas. Brazos County, low woods on the Brazos River, near Brazoria, 

 E. J. Palmer, Nos. 5131 (4) and 6734 (4, type), April 7, and October 5, 1914. 



Although there is little in the flowers and fruit or in the habit of this 

 plant to distinguish it from some of the other Virides species which grow 

 in the valley of the lower Brazos River, where this Group is represented 

 perhaps by its greatest diversity of forms, the short small leaves are so 

 distinct in shape that until the Texas species are better known it appears 

 necessary to treat it as a species, 



Crataegus desertorum (§ Virides), n. sp. 



Leaves ovate to slightly obovate or suborbicular, acute, acuminate or 

 rounded at apex, gradually or abruptly narrowed and cuneate at base, 

 finely doubly serrate usually only above the middle with blunt glandular 

 teeth, and often slightly divided into short acute lobes; covered when they 

 unfold with short lustrous white hairs, and villose below along the midrib 



