606 PROCEEDINGS OF THE ACADEMY OF [Sept,, 



and very lustrous during their first season and dull gray-brown the 

 following year, and armed with numerous stout slightly curved bright 

 chestnut-brown ultimately gray spines 4-6 cm. in length. 



Bucks county: Durham, C. D. Fretz (No. 170, type), May and Sep- 

 tember, 1903; Fretz and Sargent (No. 160), September, 1902. 

 23. Crataegus delicata n- sp. 



Leaves ovate, acute or acuminate, rounded, truncate or occasionally 

 cuneate at the broad entire glandular base, sharply doubly serrate 

 above, with straight slender teeth tipped with large dark glands, and 

 deeply divided into 3 or 4 pairs of narrow acuminate lateral lobes, 

 when they unfold deeply tinged with red, glabrous below and covered 

 above with short lustrous white hairs, nearly fully grown when the 

 flowers open the middle of May and then membranaceous, pale yellow- 

 green, and hairy on the upper surface, and at maturity thin but firm 

 in texture, blue-green and scabrate above, pale blue-green below, 

 3.5-4 cm. long and 2.5-4 cm. wide, with slender midribs and thin remote 

 primary veins; petioles very slender, slightly wing-margined at the 

 apex, at first sparingly pilose, soon glabrous, 1.2-1.5 cm. in length; 

 leaves on vigorous shoots mostly truncate or occasionally subcordate 

 at the base, more deeply lobed, and 5-6 cm. long and broad. Flowers 

 about 1.5 cm. in diameter, on long hairy pedicels, in 4-7-flowered com- 

 pact corymbs; calyx-tube narrowly obconic, glabrous, the lobes broad, 

 acuminate, coarsely glandular-serrate toward the bright red apex, 

 reflexed after anthesis; stamens 5 or 6; anthers dark rose color; styles 

 3, surrounded at the base by a ring of long snow-white hairs. Fruit 

 ripening the middle of September, ovate to oblong, dull red, covered 

 with a thick glaucous bloom, 1.4-1.5 cm. long, 1-1.2 cm. wide; catyx 

 little enlarged, without a tube, and wdth a wide shallow cavity, and 

 spreading appressed lobes dark red on the upper side below the middle, 

 their tips mostly deciduous from the ripe fruit; flesh thick and pulpy; 

 nutlets 3, gradually narrowed to the obtuse rounded ends, very promi- 

 nently ridged on the broad rounded back, with a high broad deeply 

 grooved ridge, about 8 mm. long and 5 mm. wide. 



A shrub with numerous erect stems 2-3 m. high and 5-8 cm. in 

 diameter, covered with silvery-gray slightly fissured scaly bark, and 

 slender slightly zigzag branchlets dark orange-green when they first 

 appear, dark red-brown and very lustrous during their first winter, 

 becoming ashy-gray or gray tinged with brown in their second or third 

 year, and armed with numerous stout slightly curved red-brown 

 shining spines 3-3^ cm. in length. 



Bucks county: Hillsides near Sellersville, C. D. Fretz (No. 177, 

 type), May and September, 1903. 



