294 ICOSANDRIA DI-PENTAGYNIA 



qomcry and Bucks. The young branches arc of tin subject to disease 9 also, from 

 the puncture of insects. Il^ave used this Thorn to a considerable extent,— andhati 

 succeeded in obtaining some pretty fair hedges ; but I am rune strongly inclined to 

 the opinion that the C. cms galli, or Cock spur Thorn, is entitled to theprtfi rence, 

 for that object. One import ant fact, however \ applies to every sort qf Thorn,— and 

 should be remembered by all persons tcho may undertake hedging,— irhich is, that 

 if they are not carefully attended to, and skillfully managed, the hedges trill be- 

 come a nuisance, and a source of vexation, rather than a benefit, —und had better 

 never be attempted. With due care and skill, they ?nake a valuable and ornamental 

 enclosure. 



7. C oxyacaxteia, L. Leaves obovatc-euneatc, laciniatc-lobed, often 

 trifid, smoothish, shining; petioles and calyx destitute of glands ; styles 

 1 to 3. Becky Hot. p. 112. 



SnAitr-TiioiiNKD On at.iwus. Vulgo — Hawthorn. English Thorn. 

 Gullice — L'Aubcpine. Germ. — Dcr Hagedorn. ffisp. — Espina blanca. 

 Stem 8 to 12 feet high, much branched; branches rugged, armed with sharp 

 tapering thorns about half an inch long. Leaves an inch to an inch and half lomr, 

 and about as wide as long, cuneate, or sometimes ovate, and variously lobed, 

 often 3 or 5-lobed, with the middle or terminal lobe trifid, somewhat pilose, deep 

 shining green on the upper surface, paler beneath ; petioles half an inch to an inch 

 long, slender, smooth, or sparingly pilose; stipules of the young plant foliaccous, 

 obliquely falcate-reniform, acuminate and mucronate on one side, coarsely serrate. 

 Corymbs terminal on the short spurs. Calyx smoolhish, or sometimes v II low ; 

 segments lance-ovate, acute. Petals white. Style mostly solitary. Fruit ovoid, 

 small (about 1 fourth of an inch in diameter), purple when mature. 



Hab. Roadsides ; fence»rows, fee. not common. Fl. May. «FV. October. 



Obs» This species (of which there are several varieties, in Europe,) was intro- 

 duced many years ago, and is apparently naturalized in a few localities ; but docs 

 not seem to extend itself much. It is said to be the favorite Thorn for hedging, in 

 England; hut is rarely applied to that use, here. Some ten or twelve additional 

 species have been enumerated in the U. States; but the genus stands greatly in 

 need of a careful revision. 



232. AMELANCHIER. Medik. DC. Prodr. 2. p. 632. 

 [An uncouth French name ; which seems to be sanctioned by the best authorities] 



Calyx with the tube adnatc to the ovary ; limb 5-cleft. Petals 5, 

 lance-oblong. Ovary 10-celled, or rather with 5 bipartite cells. Styles 

 5, subconnate at base. Pome, when mature, 3 to 5-cellcd ; cells car- 

 tilaginous. Seeds 3 to 5. 



Small trees, or shrubs : unarmed ; leaves simple, alternate, serrate ; flowers 

 racemose, terminal ; bracts lance-linear, caducous. Xat. Ord. W. Lindl. Po< 

 mace,*:. 



1. A. Botiitapium, Lindl. Leaves obovatc-oblong, or elliptic-obovate, 



acuminate, subcordate at base, silky-villose when young, finally smooth ; 



racemes loose, elongated; petals linear-lanceolate. Beck, Bot. p. 112. 



Mespilus nivca. Marsh. Arbust. p. 90. 



M. canadensis, var. cordata. JUx. Am. 1. p. 291. 



M. arborea, Mx.f. Sylva. 2. p. 70, Icon~, tab. 66. 



Pyrus Botryapium. Wittd. Sp. 2. p. 1013. Ait. Kcw. 3. /;. 207. 



Muhl CataL p. 49. Pursh, Am. 1. p. 339. Bigel. Bost. p. 196. 



