UOSACE^E. 97 



half as long as the petals. R. procumbent Muhl. JR. trivialis Pursh. not 

 of Mich. R. flagcllaris Willd. 



Rocky woods. Can. toVirg. May, June. T2- Stem trailing or procumbent, 

 ascending at base. Flowers white, smaller than in the preceding. Fruit round- 

 ish or oblong, half an inch to an inch in diameter, black, sweet and juicy. 



Low Blackberry. Dewberry. 



8. R. hispidus Linn. : stem slender, prostrate, and with the petioles and 

 peduncles armed with retrose bristles or weak prickles ; leaves ternate or 

 pedate-quinate ; leafets somewhat coriaceous, obovate, coarsely and un- 

 equally serrate, entire towards the base, smoothish ; flowers in corymbs or 

 racemes, without bracts ; sepals spreading, half the length of the obovate 

 or oblong-obovate petals. R. obo'valis Mich. R. sempervirens Big. 



Wet woods and swamps. Can. to Car. May, June, \i. Stem profusely 

 trailing, with short erect branches. Flowers white, small. Fruit composed of 

 a few Targe grains, blackish, sour. Trailing Swamp Blackberry. 



9. R. setosus Big. : stem reclining, armed with weak prickles ; branches 

 setose at the apex ; leaves ternate or quinate, on long petioles ; leafets obo- 

 vate-wedgeform, simply serrate, smooth ; flowers in racemes, with bristly 

 pedicels ; petals obovate-wedgeform, longer than the sepals. R. hispidus 

 var. setosus Torr. <$ Gr. 



Swamps. Can. and Mass. Big. June. ?<>. Flowers white. Fruit red, 

 small. Bristly Raspberry. 



10. R. trivialis Mich. : sarmentose procumbent, bristly, at length prickly ; 

 leaves ternate or pedate-quinate ; leafets ovate-oblong or lanceolate, mostly 

 acute, sharply serrate, nearly smooth; peduncles 1 3-flowered; petals 

 broad-obovate, more than twice as long as the reflexed sepals. R. hispidus 

 Willd. 



Dry woods. Penn. to Flor. W. to Texas. March May. T2 . The leaves 

 are more coriaceous and often smaller than in any other N. American species, 

 the young stems very hispid as well as prickly, the jlowers large in proportion, 

 on long-hispid or prickly peduncles. Torr. <y Gr. Stem sometimes with erect 

 branches. Fruit large, black. Low Bush Blackberry. 



11. R. cuneifolius Pursh.: low, armed with stout recurved prickles; 

 leaves ternate and pedate-quinate ; leafets wedgeform-obovate, somewhat 

 coriaceous, entire at base, subplicate, pubescent-tomentose beneath, ter- 

 minal one petiolate ; peduncles few-flowered ; petals obovate, much longer 

 than the tomentose oblong mucronate sepals. R. parviflorus Walt. 



Sandy fields. N. Y. to Flor. May, June, f? . Stem 1 3 feet high. Leaves 

 rarely quinate. Flowers white. Fruit ovoid, black, juicy, eatable. 



Sand Blackberry. 



7. DALIBARDA. Linn. Dalibarda. 

 (In honor ofDalibard, a French botanist of the last century.) 



Calyx with the tube short, concave ; limb 5 6 -cleft, naked 

 without ; lobes dentate. Petals 5, sessile, deciduous. Sta- 

 mens many. Ovaries 5 10, with short terminal styles. Ache- 

 ma few, dry, adhering to the calyx. 



D. repens Linn. : stem creeping ; leaves simple, cordate, crenate-dentate ; 



5 



