330 ORDER 47. ROSACE^fi. 



acuminate or cuspidate or nvucronate, sharply serrate, smooth ; rac. loose, elon- 

 gated ; segm. of the caL triangular-lanceolate, nearly as long as the tube ; petals 

 linear-oblong or oblanceolate ; fr. purplish, globous. A small tree or f-hrub, 

 found in woods, U. S. and Brit. Am., rarely exceeding 35f in height. Lvs. 

 2 to 3' long, downy-tomentous when young, at length very smooth on both 

 sides, very acute and finely serrate. Fls. large, white, in terminal racemes, ap- 

 pearing in early spring, rendering the tree quite conspicuous in the yet naked 

 forest. Fruit pleasant to the taste, ripening in June. (Pyrus Botryapium L. f.) 

 /3. OBLONGiFoLiA T. &. G. Shrubby; Ivs. oblong-oval, mucronate, and with 

 small, sharp serratures; rac. and flowers smaller; pet. oblcng-obovate, 

 thrice longer than the calyx. (A. ovalis Hook.) 

 y. ROTUNDIFOLIA T. &. G. Lvs. broad-oval; petals linear-oblong. Shrub 10 



to20fhigh. (Pyrus ovalis Willd.) 



6. ALXIFOLIA T. & G. Shrubby or arborescent ; Ivs. orbicular-oval, rounded or 

 retusa at each end, serrate only near the apex ; pet. linear-oblong ; stam. 

 very short. (Aronia alnifolia Nutt.) 



t. OLiGOC-iRPA T. & G. Shrubby; Ivs. mostly glabrous from the first, elliptic- 

 oblong, cuspidate; rac. 2 to 4-flowered, pet. obovate-oblong. Mountain 

 swamps, N. II., N. Y. and northward. 



12. CRAT/E'GUS, L. THORN. HAWTHORN. (Gr. updro^ strength ; 

 on account of the firmness of the wood.) Calyx nrccolatc, limb 5-cfeft ; 

 petals 5; stamens oo; ovaries 1 to 5, with, as many styles; pome 

 fleshy, containing 1 to 5 bony, 1-secdcd carpels, and crowned at the 

 summit by the persistent calyx and disk. Trees or shrubs, armed with 

 thorns. Lvs. simple, often- lobed. Bracts subulate, deciduous, mostly 

 glandular. Fls. corymbous. 



Corymbs 6 to 3:l-fl jwcrcd, appearing with the leaves, (a) 



a. Yillous or pubescent. Lvs. pli 



_ . cate or sulcate alone the veins Nos. 1, 2 



a Pubescent. Lvs. plain, not at all plicate, cleft or hot Nos. 8, 4 



a Glabrous throughout. Lvs. abrupt at base, lobed, petioled Nos. 57 



Lvs. attenuate at base, seldom lobed Nos. 8, 9 



Corymbs 1 to C-flowered, appearing before tlie downy leaves No. 10 



appearing with the leaves, pubescent No. 11 



glabrous .N os. 12, 13 



1 C. tomentosa L. BLACK THORN*. Lvs. broad-ovate or oval, alnpt at lose, the 

 margin doubly aud sharply serrate or cut into many small lobe*, villous cr j ubescent 

 when young as well as the petioles and compound corymbs of large Us., veins 

 prominent beneath, sulcate above; fruit rather large (8 to 9" diam.) oval or 

 globular, 5-carpeled, 2 to 5-seeded, crimson, tinged j-ellowish. Can. to Ky. and 

 Car. Mts. A large shrub or tree 15 to 25f high. Lvs. half grown with the hand- 

 some white fls., finally 2 to 3' by 1 to 2'. Fl. Apr., May. Fr. Jl. Aug. 



(3. PLICATA. Lvs. smaller, nearly glabrous and strongly plicate. Vt. (T. & G.), 



N. H. and N. Y. 

 }'. PYRIFOLI A Ait. Lvs. ovate-elliptic or oval, acute at base, nnd with the 



slender petioles and corymbs thinly pubescent, plicate, sharply tccihcd ai.d 



slightly cut-lobed. Styles mostly 3. Mich, to Iowa. 

 5. FLABEI.LATA Bosc. " Lvs. roundish-cuneiform or scmcwl.at fr.nshaped, 



glabrous, dentate and cut-lobed above ; corymbs and bracts pubescent, glan- 

 dular. 111., Iowa. 

 f. MOLLIS Gray. Lvs. largo, softly villous, subcordate, with the margin quite 



conspicuously, many (9 to 13)-lobcd; corymbs tanescentJy villous; fruit 



downy when young. Ohio to Iowa. 



2 C. ptmctata Jacq. Lvs. cuneiform-olm-ate, etoubly and often ipeifely serrate, 

 entire at base, and narrowed to a short, winged petiole, veins straight and pi eminent, 

 pubescent beneath; corymbs and cal. villous-pubescent ; sty. 3 (1 or 2); fr. 

 globous, punctate. Borders of woods, U. S. and Can. Tree 12 to ^5f high. 

 Branches wide-spreading, crooked, covered with cinerous bark. Thorns stout, 

 sharp, 1 to 2' long, sometimes wanting. Lvs. H to 2V long, \ as wide, acute or 

 short acuminate; petioles I to 1' long. Fls. white, in somewhat leafy, compound 

 corymbs of 8 to 15. Fr.~5 to 8 ' dlnm., red or yellowish, eatable in Sept. Fls. 

 Apr. Jn 



