ROSACE .E. 105 



tod. anequefly serrate, the terminal one, somewhat cordate, conspicuously stalked ; 

 flowers in elongated terminal racemes ; sepals acuminate, much shorter than the 

 obovate spreading petals. 



Vaar. frondosus, Torr.: smoother and much less glandular; flowers lower corym- 

 bose with leafy bracts. 



Fields and borders of thickets; common. May, Jane. Stem erect or declined, -t 

 to S feet high. Flowers white, numerous. Fruit ovoid-oblong, % to 1 inch long, 

 purple or nearly black when ripe, sweet and well flavored. Aug., Sept. 



7. R. Canadensis, L. Low Blackberry. Dewberry. 



Stem procumbent or trailing, somewhat prickly ; leaves ternatc or pedately 5 to 

 7-parted; leaflets oval or lance oral, mostly pointed, thin, nearly smooth, sharply 

 and unequally cut serrate, the terminal on petioles and suVcordatc; flowers in 

 racemes, with leaf Tike bracts. 



randy and gravelly fields: common. May, June. Stems ascending at ba?e, 

 trailing several yards on the ground. Flowers white, on slender pedicels. Petals 

 twice as long as the calyx, obovate. Fruit % to 1 inch in diameter, black, sweet 

 and juicy, ripe July and Aug. 



8. R. hispldus, L. Running Swamp Blackberry. 



Stems long, slender, somewhat shrubby, prostrate, beset with small prickles- 

 turned backwards; leaves ternate or pedate, 5-foliate; leaflets somewhat coriaceous,, 

 obovate, obtuse, coarsely serrate, entire towards the base, smoothish ; flowers in 

 corymbs or racemes, without bracts ; sepals spreading, half as long as the petals. 



Swamps and wet woods; common. May, June. Stem profusely trailing with 

 short erect branches. Leaflets 1 to 2 inches Pong, }4 as wide, nearly sessile, persis- 

 tent through the winter on the common petiole 1 to 3 inches long. Flowers white. 

 Fruit composed of a few large blackish giains, red or purple. 



9. R, cuneifolius, Pursh. Sand Blackberry. 



Low shrubby armed with stout recurved prickles ; leaves ternate and pedately 

 5-foliate; leaflets wedge-form, obovate, thickish, serrate towards the apex, pubes- 

 cent tomentose beneath; peduncles 2 to 4-flowered. 



Sandy fields and woods. May, June. Stem 1 to 3 feet high. Petioles often 

 prickly. Flowers white or roseate. Petals 3 times as long as the'tomentose oblong 

 rnucronatc sepaLs. Fruit black, juicy, well-flavored, ripe in Juty, Aug. 



10. R. trivialis, Mieh. Low Bush Blackberry. 



Procumbent with many leafy and nearly erect branches, armed with numerous 

 recurved prickles ; leaves mostly ternate ; leaflets ovate o» oval, unequally serrate, 

 more or less pilose; peduncles 1 to 3-flowered. 



Dry woods or rocky neglected fields. April, May. Stem i to 8 feet long, slender, 

 often several from the same root running in different directions, smoothish, purple, 

 and giving out numerous leafy flowering branches 2 to 6 inches long, nearly erect, 

 Flowers terminal, white, rather large. J\tals obovate, twice as long as the calyx. 

 Fruit oblong or roundish, ]4 to 1 inch in diameter, very succulent and sweet, black 

 wlien rije. July. 



14. ROSA. Tourn. Rose.- 



Celtic rhos, red ; Gr. rodon, ; Lat. rosa. 



Calyx-tube urn-shaped, fleshy, contracted at the orifice ; 

 limb "5-parted, the segments often with a leafy appendage. 

 Petals 5, inserted with the numerous stamens into the edgo 

 of the calyx-tube. Pistils numerous, nearly included, in- 

 serted over the whole inner surface of the disk. Oyabies 



