203 



J9K).] NATURAL SCIENCES OF PHILADELPHIA. 



flowers open in the last week of May and then slightly tinged with red 

 very thin yellow-green and roughened above by short white hairs and 

 pale below, and at maturity thin but firm in texture, dark yellow- 

 green and scabrate on the upper surface, pale bluish green on the lower 

 surface 3.5-4.5 cm. long and 2.5-3.5 cm. wide, with thin prominent 

 yellow midribs and veins; petioles slender, slightly wing-margined 

 at the apex, 2.5-3 cm. in length; leaves on vigorous shoots thicker, 

 usually rounded at the broad base, frequently abruptly pointed at the 

 apex more coarsely serrate and more deeply lobed, and often 5-6 cm. 

 loner and wide. Floivers 1.5 cm. in diameter, on long slender pedicels, 

 in crowded 5-15-flowered corymbs, with oblong-obovate to linear 

 olandular bracts and bractlets fading brown and often persistent until 

 after the flowers open, the elongated lower peduncles from the axils 

 of upper leaves; calyx-tube narrowly obconic, the lobes separated by 

 wide sinuses, gradually narrowed from the base, long, slender, acumin- 

 ate finely glandular-serrate near the middle, reflexed after anthesis; 

 stamens 5-10; anthers rose color; styles 3 or 4, surrounded at the 

 base by a narrow ring of pale tomentum. Fruit ripening about 

 the 20th of September, on slender drooping red pedicels, in few-fruited 

 clusters, obovate, rounded at the apex, gradually narrowed from above 

 the middle to the base, scarlet, lustrous, marked by large pale dots 

 9-10 mm long and 7-9 mm. in diameter; calyx little enlarged, with 

 a broad shallow cavity, and small spreading and appressed lobes dark 

 red on the upper side below the middle; flesh thin, yellow, soft and 

 juicy nutlets 3 or 4, gradually narrowed and rounded at the ends, 

 sometimes broader at the base than at the apex, ridged on the back, 

 with a broad low grooved ridge, 6-6.5 mm. long and 4-4.5 mm. wide 

 A shrub 3-4 m high, with small erect stems and branches covered 

 with yellow-green bark, and slender slightly zigzag branchlets dark 

 orange-green when they first appear, becoming bright chestnut 

 brown lustrous and marked by small pale lenticels in their first season 

 and dull red-brown the following year, and armed with numerous 

 slender slightly curved chestnut brown shining ultimately dark gray 

 spines 3.5-4.5 cm. long, persistent and becoming branched on old 



stems 



Border of woods, Maloney Home, near Scranton, Lackawanna 

 County, A. Twining, (No. 31 type) May 28 and September 23, 190.. 



17. Crataegus radina n. »p. 



Glabrous with the exception of the hairs on the upper surface 

 of the youno- leaves. Leaves ovate to broad-obovate, acuminate and 

 long-pointed at the apex, gradually or abruptly cuneate at the entire 



