468 



TREES OF NORTH AMERICA 



and often 2f '-3' long and wide, their petioles f '-!' long. Flowers about f ' in diameter, on 

 short hoary-tomentose pedicels, in narrow crowded many-flowered hoary-tomentose cor- 

 ymbs; calyx-tube broadly obconic, covered with matted pale hairs, the lobes gradually 

 narrowed, acuminate, glandular-serrate, villose; stamens 20; anthers dark rose; styles 5. 

 Fruit ripening in August and September, on elongated tomentose pedicels, in few-fruited 

 drooping clusters, depressed-globose, red; calyx enlarged, the lobes conspicuously serrate, 

 puberulous on the upper surface, reflexed and closely appressed, sometimes deciduous from 

 the ripe fruit; flesh thin, yellow, dry and mealy; nutlets 5, thin, narrow and rounded at 

 base, acute at apex, rounded and obscurely grooved on the back, about T V long. 



A tree, sometimes 20 high, with a trunk 8'-10' in diameter, heavy wide-spreading 

 branches forming a broad round-topped head, and stout branchlets covered at first with a 

 thick coat of matted pale hairs, orange-red and puberulous at the end of their first season, 

 glabrous and reddish brown the following year, and armed with slender nearly straight 

 spines about 1|' long. 



Distribution. Limestone hills in the neighborhood of Nashville, Davidson County, 

 Tennessee. 



72. Cratsegus invisa Sarg. 



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

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

 above the middle into 3 or 4 pairs of small acuminate lobes, densely tomentose below and 



Fig. 424 



villose above when they unfold, 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 

 hairs and coated below with long matted white hairs, and at maturity thin, yellow-green, 

 scabrate and lustrous above, hairy below especially on the midrib and veins, 2|'-3' long, 

 and 2'-2|' wide; petioles slender, slightly wing-margined at apex, covered with pale hairs 

 early in the season, becoming nearly glabrous, and l|'-2' in length; leaves at the end of 

 vigorous shoots broad-ovate, acuminate, abruptly cuneate at the wide base, more coarsely 

 serrate, deeply divided into acute lateral lobes, and often 3|'-4' long and 3'-3?' wide; 

 petioles slender, villose, l|'-2' in length. Flowers opening at the end of March, about f ' in 

 diameter, on slender pedicels thickly coated like the wide calyx-tube with long matted 

 white hairs, in broad mostly 7-12-flowered corymbs; 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; stamens 20; 

 anthers white; styles 3-5, surrounded at base by a ring of long white hairs. Fruit ripening 



