828 



TREES OF NORTH AMERICA 



pubescent below; petioles hoary-tomentose when they first appear, becoming glabrous, 

 '-' in length. Flowers opening the end of March or early in April, \'-\' long, on pedicels 

 more or less densely villose-pubescent with white hairs, becoming nearly glabrous, f ' f ' in 

 length; calyx densely hoary-tomentose or rarely villose-pubescent; corolla f'-|' in diame- 

 ter; stamens 10-16, filaments slightly villose. Fruit ripening in August and September, 

 clavate, gradually narrowed into the long stipitate base, f'-l^' long, 4-winged, the wings 

 narrow, of equal width or occasionally with the alternate wings narrower than the others; 

 stone ovoid, abruptly narrowed below into a short stipe, gradually narrowed to the apex, 

 obscurely angled, f'-lj' long. 



A slender tree, 25-30 high, with a long trunk 8'-10' in diameter, small light brown 

 slightly ridged branches and slender branchlets hoary-tomentose when they first appear, 

 becoming pubescent or nearly glabrous by the end of their first season and light gray-brown 

 in their second year; or a shrub only a few feet tall. Winter-buds ovoid, acute, slightly 

 compressed, villose, about f ' long. Bark of the trunk thick, dark brown or nearly black, 

 and divided by deep longitudinal furrows into narrow rounded rough ridges. 



Distribution. Northern Florida, in sandy uplands (St. John, Clay, Jackson, Gadsden 

 and Lafayette Counties) ; not common; Alabama (Lee County) ; eastern Mississippi (Laurel, 

 Jones County), and eastern Oklahoma (near Page, Le Flore County). 



4. Halesia diptera Ellis. 

 Mohrodendron dipterum Britt. 



Leaves ovate to obovate, oval or elliptic, abruptly long-pointed or rarely rounded at 

 apex, gradually narrowed and cuneate or rounded at base, undulate-serrate with remote 

 minute callous teeth, coated below with pale tomentum and pubescent above when they 

 unfold, and at maturity thin, light green and glabrous or pubescent on the slender midrib 

 on the upper surface and paler and soft-pubescent on the lower surface, 3'-4' long and 

 2'-2' wide, and at the end of vigorous branches up to 8' long and 3' wide, with pale con- 



spicuous arcuate veins and reticulate veinlets; petioles slender, pubescent, f'-f ' in length. 

 Flowers opening from the middle of March to the end of April, usually nearly 1 ' long, on 

 slender tomentose pedicels H'-2' in length, from the axils of obovate puberulous bracts 

 rounded or acute at apex and '-f ' long, in few-flowered fascicles or in 4-6-flowered ra- 

 cemes; calyx thickly covered with hoary tomentum, the short lobes nearly glabrous on the 

 inner surface; corolla puberulous on the outer surface, divided nearly to the base into 

 slightly obovate or oval spreading lobes; stamens 8-16, usually 8, nearly as long as the 

 corolla; filaments covered with pale hairs, and sometimes free from the corolla; ovary usu- 

 ally 2, rarely 4-celled and covered, like the style, with pale pubescence. Fruit oblong to 



