392 TREES OF NORTH AMERICA 



rity glabrous, dark bluish green on the upper surface and pale on the lower surface; petioles 

 stout, usually red l'-2' in length. Flowers \' in diameter, in rather narrower clusters, ap- 

 pearing eight to ten days later than those of the type. Fruit subglobose, bright orange- 

 red, often \' in diameter. 



A tree, occasionally 30 high, with a trunk sometimes a foot in diameter, and spreading 

 branches forming a round-topped handsome head. 



Distribution. Coast of Labrador to the northern shores of Lake Superior and Minne- 

 sota, southward to the mountains of northern New Hampshire, Vermont, and New York. 

 Distinct in its extreme forms but connected with Sorbus americana by intermediate forms. 



This variety of Sorbus americana, perhaps the most beautiful of the genus when the 

 large and brilliant fruits cover the branches in autumn and early winter, occasionally 

 finds a place in the gardens of eastern Canada and the northern states. 



5. HETEROMELES Roem. 



A tree, with smooth pale aromatic bark, stout terete branchlets pubescent or puberu- 

 lous while young, acute winter-buds covered by loosely imbricated red scales, and fibrous 

 roots. Leaves oblong-lanceolate, acute at the ends, sharply and remotely serrate with 

 rigid glandular teeth, or rarely almost entire, dark green and lustrous above, paler below, 

 feather- veined, with a broad midrib and conspicuous reticulate veinlets; petiolate with 

 stout petioles often furnished near the apex with 1 or 2 slender glandular teeth ; stipules 

 free from the petioles, subulate, rigid, minute, early deciduous. Flowers on short stout 

 pedicels, in ample tomentose terminal corymbose leafy panicles, then- bracts and bract- 

 lets acute, minute, usually tipped with a small gland, caducous; calyx-tube turbinate, 

 tomentose below 7 , glabrate above, the lobes short, nearly triangular, spreading, persistent; 

 disk cup-shaped, obscurely sulcate; petals flabellate, erose-denticulate or emarginate at 

 apex, contracted below into a short broad claw, thick, glabrous, pure white; stamens 10, 

 inserted in 1 row r with the petals in pairs opposite the calyx-lobes; filaments subulate, 

 incurved, anthers oblong-ovoid, emarginate; carpels 2, adnate to the calyx-tube, and 

 slightly united into a subglobose tomentose nearly superior ovary; styles distinct, slightly 

 spreading, enlarged at apex into abroad truncate stigma; ovules 2 in each cell, ascending; 

 raphe dorsal; micropyle inferior. Fruit obovoid, fleshy, the thickened calyx-tube con- 

 nate to the middle only with the membranaceous carpels coated above with long white 

 hairs filling the cavity closed by the infolding of the thickened persistent calyx-lobes, 

 their tips erect and crowning the fruit. Seed usually solitary in each cell, ovoid, obtuse, 

 slightly ridged on the back; seed-coat membranaceous, slightly punctate, light brown; 

 hilum orbicular, conspicuous; embryo filling the cavity of the seed; cotyledons plano- 

 convex; radicle short, inferior. 



The genus is represented by a single species of western North America. 



The generic name, from erepos and w\ov, is in reference to its difference from related 

 genera. 



1. Heteromeles arbutifolia Roem. Tollon. Toyon. 



Leaves appearing with the flowers in early summer, 3'-4' long, I'-lf wide, usually 

 persistent during at least two winters; petioles \'-\' in length. Flowers opening from 

 June to August in clusters 4 '-6' across and often more or less hidden by young lateral 

 branchlets rising above them. Fruit ripening in November and December, mealy, as- 

 tringent and acid, scarlet or rarely yellow, ^' long, remaining on the branches until late in 

 the winter. 



A tree, sometimes 30 high, with a straight trunk 12'-18' in diameter, dividing a few 

 feet above the ground into many erect branches forming a handsome narrow round-topped 

 head, and slender branchlets covered at first with pale pubescence, in their first winter 

 dark red and slightly puberulous, ultimately becoming darker and glabrous. Winter-buds 

 j' long. Bark \'-\' thick, light gray, with a generally smooth surface roughened by ob- 



