/ 



4 



/ 



) 



CRATAEGUS IN MISSOURI. ' 59 



lowing year, and unarmed or armed with occasional small 

 slender nearly straight chestnut-brown shining spines 1-1,5 

 or occasionally 2 cm. long. 



Gravelly banks of small streams near Grandin, Carter 

 County, B. F. Bush (Nos. 394, 404, 405, 406, 407), May 8, 

 1901, (No. 5 type) May 6 and Oct. 11, 1905, (No. 5 A) May 7 

 and Oct. 10, 1905. 



Crataegus tenuispina is well distinguished from the other 

 Crus-galli species by its narrow acuminate leaves and by its 

 small weak and infrequent spines. 



19. Crataegus Palmeri Sargent, Trees and Shrubs, i. 57, 



t. 29 (1903); Manual, 381, f. 300. 



Dry bark, and near streams in rich moist soil, Webb City 

 and Carthage, Jasper County. 



20. Crataegus rotunda, n. sp. 



Glabrous with the exception of a few caducous hairs on the upper surface 

 of the young leaves and on the inner surface of the calyx-lobes. Leaves 

 obovate-cuneate, acute or rounded at the apex, and coarsely serrate above 

 the middle, with straight or incurved glandular teeth; more than half- 

 grown when the flowers open the middle of May and then thin, yellow-green 

 and lustrous above and pale below, and at maturity subcoriaceous, dark 

 yellow-green, smooth and very lustrous on the upper surface, pale yellow- 

 green on the lower surface, 3.5-4 cm. long and 2-2.5 cm. wide, with thin 

 midribs, and slender prominent primary veins; turning in the autumn 

 bright clear yellow before falling; petioles stout, wing-margined to below 

 the middle, occasionally glandular, 1.2-1.4 cm. in length; leaves on 

 vigorous shoots coriaceous, broadly ovate to orbicular, short-pointed, very 

 coarsely serrate, occasionally slightly lobed, 6-7 cm. in diameter, with 

 broad-winged glandular petioles and foliaceous lunate coarsely serrate 

 persistent stipules. Flowers 1.2-1.3 cm. in diameter, on long slender 

 pedicels, in mostly 7-10-flowered corymbs, the elongated slender lower 

 peduncles from the axils of upper leaves; calyx-tube narrowly obconic, 

 the lobes slender, acuminate, entire, slightly villose on the inner surface, 

 reflexed after anthesis; stamens 20; anthers pink; styles 2-4, usually 3. 

 Fruit ripening from the first to the middle of November, on slender drooping 

 stems, in generally 1-5-fruited clusters, subglobosc or often rather broader 

 than high, light cherry-red, 1.3-1.5 cm. in diameter; calyx prominent, 

 with a short tube, a broad deep cavity, and nearly triangular spreading 

 lobes often deciduous from the ripe fruit; flesh tliick, pale yellow-green, 

 dry and mealy; nutlets 3-5, gradually narrowed and rounded at the ends, 

 rounded and grooved or slightly ridged on the back, 5.5-7 nam. long, and 

 4.5-5 mm. wide. 



