TREES AND SHRUBS. 



CRATAEGUS PADIFOLIA, Sabg. 



Crataegus padifolia, n. sp. 



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

 leaves. Leaves oval to ovate or rarely obovate, acuminate, gradually or abruptly narrowed to the 

 cuneate entire or glandular base, sharply doubly serrate, with broad straight or incurved gland- 

 ular teeth, and rarely slightly three-lobed toward the apex ; deeply tinged with red when they 

 unfold, still more or less red, very smooth above and about half grown when the flowers open, 

 and at maturity thin, light yellow-green on the upper surface, pale on the lower surface, from 

 5.5 to 7 centimetres long and from 4 to 5 centimetres wide, with stout yellow midribs, and four 

 or five pairs of slender primary veins. Flowers 1.8 centimetres in diameter, on short erect pedi- 

 cels, in compact mostly five-flowered corymbs, with conspicuous obovate to lanceolate glandular 

 bracts and bractlets fading rose color ; calyx-tube broadly obconic, the lobes gradually narrowed 

 from wide bases, short, acuminate, glandular, with minute dark red scattered glands, reflexed 

 after anthesis; stamens ten; anthers yellowish white, faintly tinged with rose color; styles two or 

 three, surrounded at the base by a broad ring of white hairs. Fruit on stout erect or spreading 

 pedicels, in one to three-fruited clusters, short-oblong or sometimes slightly broader than high, 

 often slightly angled, full and rounded at the ends, dull orange-red marked by small dark dots, 

 from 1.2 to 1.5 centimetres in diameter ; calyx little enlarged, with a wide deep cavity, and 

 small spreading lobes mostly deciduous from the ripe fruit; flesh thin, yellow, hard, and dry; 

 nutlets two or three, broad and rounded at the apex, gradually narrowed at the base or obtuse at 

 the ends, ridged on the back, with a broad high slightly grooved ridge, from 5.5 to 6 millimetres 

 long and from 3 to 3.5 millimetres wide. 



An arborescent shrub, from 4 to 6 metres high, with small stems covered with dark scaly bark, 

 small erect and slightly spreading branches forming an open head, and slender nearly straight 

 branchlets, green tinged with red when they first appear, becoming light chestnut-red, lustrous, 

 and marked by large pale lenticels in their first season, and dull gray-brown the following year, 

 and armed with slender straight or slightly curved purple shining ultimately ashy gray spines 

 from 2.5 to 3 centimetres long. Flowers appear from the 20th to the end of April. Fruit ripens 

 from the middle to the end of September and often remains on the branches after the leaves have 

 fallen. 



Upland woods near Swan, Taney County, Missouri, B. F. Bush (No. 5), May 19 and Septem- 

 ber 23, 1905, (5 A) September 23, 1905, (5 B type) September 27, 1905, April 23, 1907, (5 C, 

 5 D, 5 F, 5 I, 5 J, and 5 K) April 21-25, 1907, also Nos. 149 and 152, June 2, 1899. 



This species is doubtfully referred to the Intricate because, although it differs from the described species in that 

 group in some important respects, it seems more nearly related to them than it does to the species of the other estab- 

 lished groups. Crataegus ■padifolia is unlike all the other species of Crataegus I have seen in the form of the leaves, 

 which, although more finely serrate, resemble in a remarkable degree those of a Padus. 



c. s. s. 



