ICOSANDRIA DI-PENTAGYNIA 291 



Stem 8 to 12 or 15 feet high, much branched; branches virgate in the young 

 plant, and often horizontal,— flexuose and finally rugged in the old,— armed with 

 long sharp gradually-tapering thorns (2 to near 3 inches in length), which are 

 rather slender, and clothed with small glandular-serrate leaves, when young. 

 Leaves 1 to 2 and a half inches long, and half an inch to an inch or inch and half 

 wide,— in var. a. generally obovate-cuneate, and subsessile,— in var. b. often lance- 

 oblong, lance-oval, or obovatc, with petioles 1 fourth to 1 third of an inch long,— 

 mostly acute, or subacuminate, sometimes obtuse and rounded at apex, unequally 

 serrate, smooth on both sides, deep green and shining on the upper surface, paler 

 or glaucous and reticulately veined beneath, nearly entire and tapering cuneately 

 at base ; stipules linear-lanceolate, glandular-serrate. Corymbs compound, many- 

 flowered, terminal on the short spurs ; peduncles often trichotomous at summit. 

 Calyx-segments linear-lanceolate, glandular-serrate (especially in var. &.), often 

 nearly entire. Petals white. Styles sometimes 2, but more frequently solitary. 

 Fruit middle-sized (ovoid-oblong, and pyriform at base, in var. &.), reddish brown 

 when mature. 

 Flab. Fence rows; R. Strode ? s, kc. not very common. Fl. June. Fr. October. 



Obs. We have, I think, two pretty distinct varieties of this, as designated above. 

 Var. b. occurs near Wi star's bridge, on the Brandy wine, and also near Mechem's 

 Mill, on the Valley creek. Var. a. which is more common, is much employed for 

 hedging, in New Castle County, Delaware ; and I believe will ultimately be 

 found, with proper management, to make a more durable and effective hedge than 

 the C. cordata, or Washington Thorn,— which is now generally used in this 

 County. It is a more rugged plant, and seems to be less liable to disease, ox to be 

 injured by insects, than the Washington Thorn. 



2. C. parvifolia, Ait. Leaves obovate-cuneate, rounded at apex, 

 crenate-scrrate, subsessile, pubescent; flowers subsolitary; calyx vil- 

 lose, segments subfoliaceous, lance-oblong, incised-serrate; styles 5. 

 Beck, Bot, p. Ill (erroneously printed O."parvijlora"). 



C. tomentosa. Mx. Am. I. p. 289. 



C. spathulata! Bart. Phil. 1. p. 226. Not of Mx. &c. 



Mespilus axillaris. Pers. Syn. 2. p. 39. 



Small-leaved Crataegus. 



Stem 3 to 5 feet high, much branched ; branches armed with a few sharp thorns 

 half an inch to an inch long, pubescent when young* and somewhat scabrous, or 

 verrucose. Leaves 3 fourths of an inch to an inch and half long, and half an inch 

 to an inch wide, generally broad and rounded at apex, coarsely and rather obtuse. 

 ly dentate-serrate, thickish and coriaceous, pubescent on both sides, rough ish but 

 shining green on the upper surface, paler beneath. Flotcers mostly solitary and 

 terminal on the short lateral branches ; peduncles 1 fourth to 1 third of an inch 

 long. Calyx tomentose ; segments longer than the ovary, serrate. Petals white. 

 Fruit roundish-obovoid, or sub-turbinate, 1 third to near half an inch in diameter, 

 5-seeded, somewhat hairy, pale greenish yellow when mature, esculent. 



Hab. Great Valley, near Brooke's Mill : rare. Ft. May. Fr. September. 



Obs. This rugged little bush was detected in the above locality by Mr. Joshua 

 Hoopes, in 1835. It is abundant in New Jersey ; but very rare in Chester County. 



3. C. punctata, Jacq. Leaves cuneate-obovate, unequally or doubly 

 incised-serrate, sub-plicate, narrowed at base to a petiole, hairy on the 

 nerves beneath ; corymbs pubescent; calyx subvillose, segments linear- 

 subulate, mostly entire ; styles 2 or 3. Bech, Bot. p. 111. 



