Crataegus Key. 



APPLE FAMILY. 



297 



fruit small, red. Shrubs or 



Group XI I L MlCKOCAKI'AE. 



Leaves membranous, lobed ; flowers small ; stamens about 

 trees of the South, with grayish-brown scaly and warty bark. 



Leaves deeply lobed or cut ; styles and nutlets 2, by. C. Marshallii. 



Leaves of the vegetative shoots only, lobed. the other leaves spatulate ; styles and nutlets 5. 



70. C spalhiilaia. 



Group XIV. P.\KVIFOLIAE. 



Leaves small, subcoriaceous ; corymbs 1-3-flowered. Shrubs. 



71. C. uni flora. 



Group XV. DOUGLASIANAE. 



Leaves subcoriaceous; petioles Ji'-M' long; corymbs many-flowered; nutlets roughly pitted on 

 the ventral faces. 72. C. Duuglasii. 



Group XVI. CORDATAE. 



Leaves often conspicuously 3-5-lobed ; petioles /4'-2' long; corymbs many-flowered ; fruit small, 

 scarlet ; nutlets bare at the apex. 7j. C. Phacnof^yrum. 



I. Crataegus Cnis-Galli L. Cock-spur Thorn. Newcastle Thorn. Fig. 2335. 



Crataegus Crus-galH L. Sp. PL 476. 1753. 

 Crataegus lucida Mill. Diet. Ed. 8, no. 6. 1768. 



A small tree, sometimes 30 high, with 

 spreading branches ; spines very numerous, 

 straight, I'-y' long. Leaves obovate to 

 elliptic, i'-4' long, i'-ii' wide (sometimes 

 2F wide), sharply serrate, except toward 

 the base, acute or rounded at the apex, 

 cuneate, dark green and shining above, 

 coriaceous, glabrous, or occasionally 

 slightly pubescent, glandless; corymbs gla- 

 brous, or occasionally pubescent ; flowers 

 about 8" broad ; stamens 10-20 ; anthers 

 usually pink ; calyx-lobes lanceolate ; acumi- 

 nate, entire; styles and nutlets usually 2; 

 fruit ellipsoid-ovoid to subglobose, about 

 5" thick, greenish to red ; flesh hard and 

 dry. 



Sandy soil ; northern New York to On- 

 tario,, eastern Kansas, south through western Connecticut to Georgia. Introduced near Montreal, 

 about Lake Champlain and on Nantucket Island. An extremely variable species for which many 

 names have been proposed. May-June : fruit ripe October. Red haw. Thorn-apple, -bush or -plum. 

 Pin-thorn. Hawthorn. 



2. Crataegus berberifolia T. & G. Barberry-leaved Haw. Fig. 2336. 



Crataegus berberifolia T. & G. Fl. N. Am. i : 460. 1840. 

 Crataegus Etigelinannii Sarg. Bot. Gaz. 31 : 2. 1901. 



A small tree, sometimes 30 high, with spreading 

 branches and a broad crown, the spines occasional ; 

 twigs pubescent, becoming glabrous. Leaves oblong- 

 cuneiform, spatulate or obovate, rounded or acute at 

 the apex, cuneate, serrate towards the apex, 5'-2j' long, 

 i'-ii' wide, rough-pubescent above, white-pubescent or 

 tomentose beneath (in northern forms less pi)bescent 

 than in southern); corymbs densely villous; flowers 

 about 8" broad; stamens 10-20; anthers yellow or pink; 

 styles and nutlets 2 or 3 ; calyx-lobes entire, slightly 

 pubescent, fruit subglobose to short-ellipsoid, about 5" 

 thick; yellow, orange or red, slightly pubescent. 



Western Kentucky to Missouri and the Gulf states. 

 May ; fruit ripe October. 



