1905.] NATURAL SCIENCES OF PHILADELPHIA. 627 



A tree sometimes 4 m. high, with a short trunk 25 to 30 cm. in diam- 

 eter covered with dark red bark separating into large thin scales, 

 numerous stout ascending gray branches forming a round-topped head, 

 and slender nearly straight branchlets marked by many small circular 

 pale lenticels, light reddish-brown when they first appear, reddish- 

 brown or purplish and often covered with a glaucous bloom during their 

 first year, and gray-brown the following season, and armed with num- 

 erous slender straight or slightly curved light chestnut-brown shining 

 spines 3-5 cm. in length, becoming on the upper part of the trunk and 

 on the base of the large branches compound and many-branched. 



Berks county: Low moist soil, in the neighborhood of swamps, on 

 Sacony creek, near Kutztown, C. L. Gruher (No. 25), 1901, September, 

 1902, May, 1903 (No. 108 with 5-8 stamens). 



v.— MOLLES. 



Stamens 10; anthers white \. C. tatnalliana. 



Stamens 5 or 6 ; anthers pink, 2. C. digna. 



1. Crataegus tatnalliana Sargent. 



Bot. Gazette, XXXV, 106 (The Genus Crataegus in New Castle County, 

 Delaware) (1903). 



Leaves ovate to oval, acute, broadly cuneate, or on leading shoots 

 rounded or rarely cordate at the entire base, divided above into short 

 acute lobes, and coarsely and usually doubly glandular-serrate; as they 

 unfold light green and covered above with short lustrous white hairs, 

 rather paler below and villose along the midribs and primary veins, and 

 at maturity membranaceous, dark yellow-green and scabrate on the 

 upper and paler and glabrous on the lower surface with the exception 

 of a few scattered hairs on the slender yellow midribs and 5 or 6 pairs 

 of thin primary veins extending to the points of the lobes, 8-10 cm. 

 long and 5.5-6 cm. wide; petioles slender, at first villose-pubescent, soon 

 glabrous or rarely puberulous at maturity, 2.5-3 cm. long; stipules 

 spatulate, acute, conspicuously glandular-serrate, caducous, or on 

 vigorous shoots foliaceous, full and rounded below, and acuminate at the 

 apex. Flowers opening during the first week in May, 2 cm. in diam- 

 eter, in compact ultimately lax slender-branched many-flowered com- 

 pound corymbs, with foliaceous, oblong-obovate bracts and bractlets, 

 acute or short-pointed at the apex, and coarsely serrate, with glandular 

 teeth ; calyx-tube broadly obconic, thickly coated like the short slender 

 pedicels with long white hairs, the lobes acuminate, serrate, with elon- 

 gated teeth tipped with red glands, dark green, slightly puberulous par- 

 ticularly along the lower side of the prominent mid vein; stamens 10; 

 anthers large, white, styles 3 or 4, surrounded at the base by a broad 



