ROSACES 



501 



short stout pedicels, in drooping or erect many-fruited slightly villose clusters, sub- 

 globose, bright scarlet, lustrous, marked by large pale dots, '-^' in diameter; calyx 

 enlarged, prominent, with elongated entire lobes, dark red on the upper side at the 



base, much reflexed and persistent; flesh thin, yellow, sweet and pulpy; nutlets 2 or 

 3, about \' long, thick and broad, rounded at the narrowed ends, the ventral cavities 

 broad and deep. 



A tree, occasionally 18-20 high, with a straight erect trunk 6'-8' in diameter, 

 wide-spreading or erect branches forming an open irregular head, and stout nearly 

 straight or occasionally slightly zigzag glabrous brauchlets, lustrous and red-brown 

 or orange-brown during their first summer and ultimately dull ashy gray, and armed 

 with stout nearly straight bright chestnut-brown shining spines l^'-2' long and often 

 pointed toward the base of the branch. 



Distribution. Low limestone ridges, Province of Quebec, south of the St. Law- 

 rence River near the Lachine Rapids, and at Caughnawaga, Rockfield, and Adiron- 

 dack Junction. 



130. Crataegus macracantha, Koehne. 



Leaves broadly obovate to elliptical or oval, acute or rounded and sometimes 

 short-pointed at the apex, gradually or abruptly narrowed and cuneate at the entire 

 base, coarsely and often doubly serrate above, with straight or incurved gland-tipped 

 teeth, and usually divided above the middle into numerous short acute or acuminate 

 lobes, when they unfold often bright red and coated on the upper surface with soft 

 pale hairs, more than half grown when the flowers open late in May and then dull 

 yellow-green, nearly glabrous on the upper surface and pale and puberulous on the 

 lower surface, and at maturity coriaceous, dark green and glabrous above, frequently 

 puberulous below along the stout midribs and 4-6 pairs of slender primary veins 

 extending obliquely to the points of the lobes and deeply impressed on the upper 

 side, usually 2'-2-^' long, l^'-2' wide; their petioles stout, more or less winged above, 

 generally about \' long, and frequently bright red after midsummer; on vigorous 

 shoots often full and rounded at the base, coarsely dentate, 3'-4' long and 2^'-3' 

 wide. Flowers about ^' in diameter, on long slender hairy pedicels, in broad more 

 or less villose many-flowered compound corymbs; calyx-tube narrowly obconic, more 

 or less villose or nearly glabrous, the lobes narrow, elongated, acuminate, glandular, 



