100 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



flowers with 10, not 20 stamens, and smaller fruit which is the smallest 

 of all the described species in the Crus-galli group. I take pleasure in 

 joining with this species the name of Mr. G. W., Stevens who first collected 

 it is 1913 during his explorations of the flora of Oklahoma 



Crataegus franklinensis (§ Pruinosae), n. sp. 



Leaves ovate and rounded or elliptic and cuneate at base, acuminate 

 at apex, slightly lobed above the middle with broad acuminate lobes, 

 sharply doubly serrate often nearly to the base, thin, glabrous, dark yellow 

 green on the upper surface, slightly paler on the lower surface, 4-4.5 cm, 

 long, 2.5-3.5 cm. wide, with a prominent midrib and slender primary 

 veins; petioles slender, occasionally glandular with small scattered glands, 

 glabrous, 2-2.5 cm. in length; leaves on vigorous leading shoots broad- 

 ovate, broad-cuneate to rounded at base, slightly decurrent on the stout 

 petiole, up to 5 cm. long and wide. Flowers opening from the 15th to 

 the 20th of May, about 1.4 cm. in diameter, on slender pedicels, in small 

 compact mostly 5-flowered glabrous corymbs; calyx-tube narrow-obconic, 

 glabrous, the lobes gradually narrowed from a wide base, short, acuminate, 

 entire or furnished with an occasional tooth, glabrous; stamens 5 or 6; 

 anthers pale pink; styles 3-5. Fruit ripening the end of September, 

 slightly obovoid to subglobose, dark red, 8-10 mm. in diameter, the calyx 

 little enlarged, nearly sessile, with a wide deep cavity narrowed and rounded 

 in the bottom; flesh thin and hard; nutlets 3-5, rounded at the ends, rather 

 broader at apex, than at base, prominently ridged on the back, 6-7 mm. 

 long and 4-5 mm. wide, the narrow hypostyle extending to below the 

 middle. 



A shrub with several stems, erect gray-green branches, slender nearly 

 straight glabrous branch lets, orange-brown early in their first season, 

 becoming dark chestnut-brown and armed with slender nearly straight 

 spines 2-3 cm. in length. 



Ohio. Franklin County, north of Columbus between Flint and Glenmary, 

 R. E. Horsey, No. 236 (type), May 18, 1914, September 22, 1914, October 23, 1912. 



This plant in general appearance resembles Crataegus ovatifolia Sarg. 

 from Coopers Plain, New York, but is distinguished from that species by 

 the absence of the short white hairs on the upper surface of the young 

 leaves. These hairs are not common on the species of the Pruinosae 

 but when they do occur furnish one of the best characters for distinguishing 

 the species in early spring. They are found on the young leaves of all the 

 species of the Silvicolae (Medioximae) which have been examined and 

 furnish w T ith the sessile calyx of the fruit the characters by which the plants 

 of this group can be distinguished from those of the Pruinosae. The 

 entire absence of these hairs from the leaves of Crataegus franklinensis 

 would place it with the Pruinosae, although the fruit with its almost 

 sessile calyx suggests that it might also be placed in the Silvicolae. 



