TREES AND SHRUBS. 



CEAT^GUS LNTISA, Sarg. 



(MoUes.) 

 Crataegus invisa, n. sp. 



Leaves ovate to oval, acute or acuminate at the apex, cuneate or rounded at the base, coarsely 

 often doubly serrate, with broad straight glandular teeth, and slightly divided usually only above 

 the middle into three or four pairs of small acuminate lobes ; when they unfold densely tomentose 

 below and villose above, about one third grown when the flowers open at the end of March and 

 then thin, dark yellow-green and roughened on the upper surface by short white hairs and coated 

 on the lower surface with long matted white hairs, and at maturity thin, yellow-green, scabrate and 

 lustrous above, hairy below on the midribs and veins, from 6 to 7 centimetres long and from 5 to 6 

 centimetres wide ; petioles slender, slightly wing-margined at the apex, covered with pale hairs early 

 in the season, becoming nearly glabrous, from 1.5 to 2.5 centimetres in length ; leaves on vigorous 

 shoots broadly ovate, acuminate, abruptly cuneate at the wide base, more coarsely serrate, deeply 

 divided into acute lateral lobes, often from 9 to 10 centimetres long and from 8 to 9 centimetres wide, 

 with slender villose petioles from 4 to 4.5 centimetres in length, and lunate coarsely serrate persistent 

 stipules. Flowers from 1.6 to 1.8 centimetres in diameter, on slender pedicels thickly coated like the 

 wide calyx-tube with long matted white hairs, in broad mostly seven- to twelve-flowered corymbs, 

 with small oblong-ob ovate acute bracts and bractlets fading brown and persistent until after the flow- 

 ers open ; calyx-lobes gradually narrowed from the base, short, broad, acuminate, laciniately 

 glandular-serrate, thickly covered with long white hairs on the outer surface, villose above the 

 middle on the inner surface, reflexed after anthesis ; stamens twenty ; anthers white ; styles three to 

 five, surrounded at the base by a wide ring of long white hairs. Fruit ripening in October, on long 

 slender slightly hairy pedicels, in erect or spreading few-fruited clusters, short-oblong, full and 

 rounded at the ends, orange-red, marked by large pale dots, slightly hairy at the ends, from 1 to 

 1.2 centimetres in diameter ; calyx little enlarged, with a broad shallow cavity pointed in the bot- 

 tom, and spreading lobes dark red on the upper side below the middle and villose toward the 

 apex ; flesh thin, yellow, dry and mealy ; nutlets three to five, rounded at the ends, broader at the 

 apex than at the base, rounded and only slightly grooved on the back, from 5 to 5.5 millimetres long 

 and about 3 millimetres wide, the prominent hypostyle extending below the middle of the nutlet. 



A tree, sometimes 10 metres high, with a tall trunk covered with dark brown bark broken into 

 small closely appressed plate-like scales, large spreading branches forming a wide irregular head, 

 and stout slightly zigzag branchlets clot^ when they first appear with hoary tomentum, dull 

 gray-brown marked by small pale lenticels and slightly pubescent, or villose on the vigorous 

 shoots, at the end of their first season and dark gray the following year, and unarmed or armed 

 with occasional slender straight chestnut-brown spines from 2.5 to 3 centimetres long. 



In dense woods on the rich bottom-lands of the Red River at Fulton, Hempstead County, Ar- 

 kansas, B. F. Bush, March 26 and October 4, 1909 (Nos. 5418, 5927 [4 A] type), B. F. Bush 

 and C. S. Sargent, March 26, 1909 (Nos. 4, 4 B), B. F. Bush, April 11, 1905, March 25, 1909 

 (Nos. 4 C, 4 D), April 11, 1905, March 25, 1909 (Nos. 4 E, 4 F) ; Texarkana, Arkansas, B. F. 

 Bush, April 6, 1905 (No. 4), April 8, 1905 (No. 4 A) ; (all in herb. Arnold Arboretum). 



c. s. s. 



