630 PROCEEDINGS OF THE ACADEMY OF [Sept., 



1. Crataegus holmesiana Ashe. 



Jour. Elisha Mitchell Sci. Soc, XVI, pt. II, 78 (1900). Sargent, Bot. 



Gazette, XXXI, 10; Silva N. Am., XIII, 111, t. 676; Man. 449, f. 366. 



Bucks county: Banks of Perkiomen creek, Sellersville, C. D. Fretz 

 (No. 2), May 12, 1896, (No. IS), May, 1899, (No. 32), July, 1899, (Nos. 

 34 and 35), August, 1899 ; Fretz and Sargent, September, 1899 ; A. Mac- 

 Elwee (Nos. 414 and 811, Herb. Philadelphia Museums), June, 1899, 

 (No. 1,507), October, 1899, (No. 1,655), May, 1900. Berks county: 

 Near Kutztown, C. L. Griiber (No. 4), 1901, May and September, 1903. 



The Pennsylvania tree differs from Cratcegus holmesiana as it usually 

 occurs in New England and Canada in its puberulous or villose corymbs, 

 pedicels and young branchlets, and in the hairs found on the under 

 surface of the leaves particularly on the midribs and veins, and is the 

 variety villipes Ashe {Jour. Elisha Mitchell Sci. Soc, XVII, pt. II, 11, 

 1901) (Cratcegus villipes Gruber, Proc. Berks Co. Nat. Sci. Club, I, 7) 

 {Cratcegus in Berks County, II) (1903). 



2. Crataegus arcuata Ashe. 



Ann. Carnegie Mus., I, pt. 3, 387 (1902). Sargent, Bot. Gazette, XXXV, 



108 (The Genus Crataegus in New Castle County, Delaware). Gruber, 



Proc. Berks County Nat. Sci. Club, 7 (Crata?gus in Berks County, II). 



Leaves ovate to oval, acute, rounded or concave-cuneate at the entire 

 base, coarsely doubly serrate above, with straight or recurved glandular 

 teeth, and divided into short acute lateral lobes, about half-grown when 

 the flowers open toward the first week of May and then light yellow- 

 green and roughened above by short white hairs and sparingly villose 

 below along the thin midribs and primary veins, and at maturity dark 

 yellow and scabrate on the upper and paler and still slightly villose 

 on the lower surface especially in the axils of the veins, 6-9 cm. long and 

 5-6 cm. wide; petioles slender, slightly grooved on the upper side, wing- 

 margined toward the apex, at first villose-pubescent, becoming 

 puberulous or nearly glabrous before autumn, sparingly glandular, 

 3-3.5 cm. in length; stipules linear, glandular, fading red, caducous; 

 leaves on vigorous shoots sometimes subcordate at the base, more 

 coarsely serrate, often deeply laciniately lobed, with slender acuminate 

 lobes, 9-10 cm. long and 8-9 cm. wide, with stout winged petioles and 

 foliaceous lunate coarsely serrate persistent stipules. Flowers 2-2.5 

 cm. in diameter, on slender villose pedicels, in wide many-flowered com- 

 pound hairy corymbs, with linear acuminate glandular bracts and 

 bractlets, fading red, and mostly deciduous before the flowers open; 

 calyx narrowly obconic, glal^rous, the lobes slender, elongated, coarsely 

 glandular, with long-stalked glands, red toward the apex, glabrous on 

 the outer, villose on the inner surface, reflexed after anthesis; stamens 



