580 PROCEEDINGS OF THE ACADEMY OF [Sept., 



becoming glabrous. Fruit oblong, often 2-5 centimeters in length, 

 rather brighter-colored than those of the type; nutlets usually 1 or 

 occasionally 2, acute at the ends, prominently or only slightly ridged 

 on the dorsal side, 1-1.2 cm. long. 



Bucks county: Durham, C. D. Fretz (No. 147A), September and 

 October, 1901, September, 1902. Berks county: North Heidelberg, 

 C. L. Gruber (No. 109) , 1902, May and September, 1903. Also near Wil- 

 mington, Delaware. 



Readily distinguished by the hairs on the upper side of the midribs 

 of the young leaves, and by the larger oblong fruits usually with a single 

 nutlet. Further investigation of this form may show that it should be 

 considered a^species. 



Crataegus crus-galli var. capellata Sargent. 



Bot. Gazette, XXXV, 100 (The Genus Crataegus in New Castle County, Dela- 

 ware) (1903); Man. 369. 



Leaves oblong-obovate, rounded or acute at the apex. Flowers 8-10 

 mm. in diameter, in many-flowered slightly villose corymbs; stamens 

 7-10; anthers pale rose color; styles usually 1, rarely 2. Fruit sub- 

 globose to short-oblong, green, slightly blotched with red, 8-9 mm. in 

 length. 



Philadelphia county: Meadow at the head of the Wissahickon Drive, 

 Germantown, W. M. Canhij, May 24, 1902. 



What appears an unusual form of Cratcegus crus-galli hsis been found 

 by Mr. Smith below Gray's Ferry in West Philadelphia (No. 248). It 

 is a tree about 5 m. high, nearly destitute of thorns, with wide-spreading 

 branches forming a round-topped head, oblong-obovate leaves acute, 

 acuminate or rarely rounded at the apex, their veins more prominent 

 than those of the leaves of ordinary forms of Cratcegus crus-galli. 

 Flowers 8-10 mm. in diameter in many-flowered glabrous corymbs; 

 stamens 6-10; anthers pink; styles 1 or 2. The fruit I have not seen. 

 The absence of thorns is remarkable in plants of this group. 

 2. Crataegus rivalis n. sp. 



Leaves obovate to oval, acute at the apex, gradually narrowed and 

 concave-cuneate at the base, and sharply usually simply serrate above 

 the middle, with glandular teeth; nearly fully grown when the flowers 

 open from the 20th to the 25th of May, and then villose, with long pale 

 hairs on the upper side of the midril^s and of the petioles, and at matiu*- 

 ity glabrous, dark green and very lustrous on the upper and dull and 

 paler on the lower surface, 4-5 centimeters long, 2-2.5 centimeters 

 wide, with prominent yellow midribs and slender conspicuous veins 

 without the parenchyma; their petioles slender, grooved, more or less 



