58 



MISSOURI BOTANICAL GARDEN. 



dull gray-brown the following year, and armed with stout 

 straight or slightly curved purplish shining ultimately ashy 

 gray spines 2.5-4 cm. long. 



Rocky hills and glades. Swan, Taney County, B. F. Bush 

 (No. 13 type), May 21 and Sept. 22, 1905, May IG, 1907, 

 (No. 13 A) May IG, and October 7, 1907. 



This species is remarkable in the shape of the leaves which 

 are generally broad and frequently truncate or obcordate at 

 the apex. 



18. Crataegus tennispiua, n. sp. 



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

 ribs of the young leaves. Leaves oval to slightly obovate, acute or 

 acuminate at the ends, and coarsely serrate above the middle, with incurved 

 glandular teeth; faintly tinged with red when they unfold, almost fully 

 grown when the flowers open about the 1st of May and then thin, yellow- 

 green and very lustrous above and paler below, and at maturity subco- 

 riaceous, dark green and lustrous on the upper surface, light yellow-green 

 on the lower surface, 4-6 cm. long and 1.5-2.5 cm. wide, with stout yellow 

 midribs, and thin prominent primary veins deeply impressed on the upper 

 side of the leaf; petioles slender, narrowly wing-margined to below the 

 middle, often rose color in the autumn, 7-8 mm. in length; leaves on vigor- 

 ous shoots thicker, broadly ovate or obovate, more coarsely serrate, some- 

 times 6-6.5 cm. long and 4-4.5 cm. wide. Flowers L2-L3 cm. in diameter, 

 on slender pedicels, in wide lax mostly 10-15-flowered corymbs, the long 

 thin lower peduncles from the axils of upper leaves; calyx-tube narrowly 

 obconic, the lobes slender, acuminate and glandular at the apex, entire or 

 slightly dentate near the middle, reflexcd after anthesis; stamens 10; 

 anthers small, pale yellow; styles 2 or 3, surrounded at the base by a 

 narrow ring of pale hairs. Fruit ripening early in October, on slender 

 spreading and drooping pedicelS; in few-fruited clusters, subglobose to 

 short-oblong, crimson, lustrous, marked by large pale dots, 9-10 mm. in 

 diameter; calyx little enlarged, with a deep narrow cavity, and small 

 spreading lobes often deciduous from the ripe fruit; flesh thin, yellow- 

 green, dry and mealy; nutlets 2 or 3, full and rounded at the ends, 

 ridged on the back, with a broad grooved ridge, 6-7 mm. long, and 3.5-4 

 mm. wide. 



A tree 7-10 m. high, with a trunk often 1.2 dm. in diameter, 

 covered with dark scaly bark, small spreading and ascending 

 branches forming a broad head, and slender nearly straight 

 branchlets dark purple and marked by large pale lenticels 

 when they first appear, becoming light chestnut-brown and 

 lustrous in their first season and pale reddish brown the fol- 



