434 TKEES OP NORTH AMERICA 



with a tall trunk 6'-8' in diameter, covered with light gray scaly bark, becoming 

 near the base of old trees deeply furrowed and nearly black, ascending branches 

 forming a broad symmetrical head, and branchlets coated when they first appear 

 with hoary tomentum, becoming light red-brown and more or less villose during 

 their first season, glabrous and rather darker in their second year, and armed with 

 numerous straight or slightly curved chestnut-brown shining spines usually I'-l^' 

 long. 



Distribution. Sandy bottom-lands in open Live Oak forests on the Brazos River, 

 Columbia, Texas. 



67. Crateegus pyriformis, Britt. 



Leaves oval or broadly ovate, acute and often short-pointed at the apex, grad- 

 ually narrowed and concave-cuneate at the entire base, sharply and sometimes 

 doubly serrate above, with straight glandular teeth, and often slightly and irreg- 

 ularly lobed above the middle, fully grown when the flowers open about the 10th 

 of May and then membranaceous, light yellow-green, roughened above by short rigid 

 pale hairs and pubescent on the lower surface, particularly along the slender mid- 

 ribs and 5 or 6 pairs of remote primary veins, and at maturity thin and firm, lus- 

 trous and scabrous above, pale and pubescent below, generally about 3' long and 2' 

 wide ; their petioles slender, winged at the apex, tomentose, ultimately pubescent, 

 l'-l' long; on vigorous shoots usually ovate, coarsely serrate, more deeply lobed and 



frequently 4'-5' long and 3'-4' wide, with foliaceous lunate acuminate villose coarsely 

 serrate stipules sometimes \' in length. Flowers 1' in diameter, on elongated slen- 

 der tomentose pedicels, in broad compound many-flowered lax corymbs; calyx-tube 

 narrowly obconic, villose, the lobes narrow, acuminate, glandular-serrate, and covered 

 more or less thickly with pale hairs; stamens 20; anthers pale rose color; styles 4, or 

 usually 5, surrounded at the base by a broad ring of pale tomentum. Fruit ripening 

 in October, on long slender pubescent pedicels, in drooping few-fruited clusters, ob- 

 ovate, full and rounded at the ends, bright cherry-red, lustrous, marked by occasional 

 large pale dots, about | ' long, \' wide, the calyx prominent, with linear glandular- 

 serrate closely appressed lobes often deciduous before the fruit ripens; flesh thin, 

 light yellow, juicy; nutlets 4, usually 5, deeply divided along the back into 2 rounded 

 ridges, dark brown, -|' long. 



