478 



TREES OF NORTH AMERICA 



yellow marked by occasional dark dots, about ^' in diameter; calyx prominent, with 

 an elongated tube, and spreading lobes usually deciduous before the fruit ripens; 



flesh thin, yellow, dry and mealy; nutlets 3, very broad, full and rounded at the 

 ends, rounded and sometimes obscurely grooved on the back, about f long. 



A tree, occasionally 20 but usually not more than 10 high, with a tall trunk 

 4'-6' in diameter, covered with thick deeply furrowed black bark broken on the sur- 

 face into thick plate-like closely appressed scales, long slender drooping branches 

 forming a handsome symmetrical round-topped head, and thin glabrous very zigzag 

 branchlets light orange-brown when they first appear, soon becoming reddish brown 

 and lustrous, and dark gray-brown in their second year, and armed with many small 

 nearly straight dark chestnut-brown spines |'-|' long. 



Distribution. Western Florida, Pensacola to De Funiak Springs; sometimes in 

 moist sand; more often in dry barrens; common and often a conspicuous feature of 

 vegetation. * 



108. Crataegus Ravenelii, Sarg. 



Leaves obovate, rounded and abruptly short-pointed or acute at the broad some- 

 times slightly lobed apex, gradually narrowed from above the middle to the elon- 

 gated cuneate base, more or less undulate on the margins, and coarsely and usually 

 doubly glandular-serrate above, with large bright red ultimately dark persistent 

 glands, nearly fully grown when the flowers open the middle of April, and then 

 coated with long pale caducous hairs, and at maturity thin but firm in texture, 

 yellow-green, scabrous on the upper surface, pale and pubescent on the lower sur- 

 face along the slender veins, l'-l|' long and about f ' wide ; their petioles slender, 

 glandular, winged above, tomentose at first, becoming pubescent, \'-^' long; stipules 

 linear to lunate, conspicuously glandular-serrate, tomentose, caducous; on vigorous 

 shoots often 2' long and 11' wide, and frequently divided above the middle into 2 or 

 3 pairs of broad lateral lobes. Flowers about f in diameter, on slender tomentose 

 pedicels, in few-flowered simple corymbs; calyx-tube narrowly obconic, thickly coated 

 with long white hairs, the lobes lanceolate, villose on the outer, glabrous on the inner 

 surface, glandular, with small red glands; stamens 20; anthers small, pale yellow; 

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



