ORDER 44. ROSACES. 105 



at top, angular ; Ifts. 3 5, ovate, acuminate, serrate; petioles prickly; calyx acumi- 

 nate ; raceme leafless, GO-flowered ; fruit ovoid, small-grained, sweet. Thickets. 3 6f. 

 Fruit black, in August. 



. frondo*ua Laioton B. Smoothish ; rao. leafy at base, short ; fr. subglobous, 

 large-grained, very acid. Fields and gardens. 



y. humlfftstis. Trailing ; leaves smaller ; peduncles few-flowered. 



2 R. cuneifollus Ph. Sand B. Pubescent; Ivs. 3-foliate ; Ifts. wedge-obovatc. en- 



tiro at base, dentate above ; racemes few-flowered, loose. Sandy woods, L. I. to Fla. 

 2 3f. Pet. white, thrice longer than calyx. May, June. 



3 R. liispidus L. Hispid with retrorse bristles; Ivs. C-foliate, smooth, green both 



sides; Ifts. obovate, thickish, persistent; fls. and fr. small, corymbed, on filiform 

 pedicels. Damp woods. 3 7f long. Fruit sour. May, June. 

 /3. *etbsu*. Lvs. oblanceolate ; fruit red. (R. setosus Bvv.) 



4 . Canadensis L. Northern Dewberry. Slightly prickly ; Ivs. 3 (rarely 5)-foliate ; 



Ifts. elliptic or rhomb-oval, acuminate, thin ; ped. long, hardly in clusters ; fruit large, 

 black, very sweet in August. Stony fields, North. 



5 R. trivialls MX. Southern Dewberry. Prickly and bristly ; Ivs. 3-5-foliate, thick. 



ovate-oblong or oval ; ped. 1-3-flowered ; sep. obtuse, reflexed. South. 



6 R. odoratus L. Mulberry. St. erect or reclining, unarmed, glandular-pilous ; Ivs. 



palmately 3-5-lobed, middle lobe longest, unequally serrate ; fls. large, in terminal 

 corymbs ; pet. orbicular, purple. Woods : common. 3 5f. Fr. red, sweet, in Aug. 



7 R. Nutkanus Mocino. Somewhat pilous ; Ivs. broad, 5-lobed, lobes nearly equal, 



coarsely serrate ; ped. few-flowered ; sep. long-acuminate, shorter than the very large, 

 round-oval, white petals. Mich., Wis. to Oreg. 5 If. 



8 R. Chamsemorns L. Cloudberry. Herbaceous, dioecious; st. decumbent at base, 



erect, unarmed, 1-flwd. ; Ivs. mostly but 2, cordate reniform, rugous, with 5-rounded 

 lobes, serrate ; sep. obtuse ; pet. obovate, white. White Mts. If. June. 



9 R. trlflorus Rich. Branches herbaceous, green ; Ivs. 3- or 5-foliate ; Ifts. nearly 



smooth, thin, rhombic-ovate, acute, odd one petiolulate ; stip. ovate, entire ; pet. erect, 

 oblong-obovate. Hilly woods, N. Fruit few-grained, dark red. 



1 R. strigosus MX. Wild Bed Raspberry. St. strongly hispid ; Ivs. pinnately 3- or 

 5-foliate> Ifts. oblong-ovate or oval, obtuse at base, canescent tomentous beneath, odd 

 one stalked ; cor. cup-shaped, white. Old fields, N. Common. Fruit red. 



11 R. occidentalls L. Black Raspberry. Thimble-berry. St. glaucous with bloom, 

 long, recurved, prickly ; Ivs. pinnately 3-foliate ; Ifts. ovate, acuminate, hoary-tomcn- 

 tous beneath, lateral ones sessile ; pet. shorter than sep. ; fr. blk. Rky. fields and gard. 



12 R. ID^EUS. Garden R. Hispid or prickly; Ivs. pinnately 3-5-foliate ; Ifts. rhomb- 

 ovate, acuminate, hoary-tomentous beneath ; sep. hoary-tomentous, pointed, longer 

 than the white petals ; fruit red, white, or yellow. ? $ 



1 3 R. ROS^EFOLIUS. Bridal Rose. Prickles straight ; Ivs. pinnately 3-7-foliate ; Ifts. 

 lance-ovate, doubly serrate, velvety ; flowers large, white. Mauritius. 



8. DALIBARDA, L. FALSE VIOLET. Calyx inferior, deeply 5-6- 

 parted, spreading, 3 of the segm. larger. Pet. 5. Sta. GO. Sty. 5 8, long, 

 deciduous. Acli. nearly dry. Lo ^vs. undivided. Scapes 1-2-flowered. 



D. repens L. Low, pubescent, bearing creeping shoots ; Ivs. simple, roundish-cordate, 

 crenate ; stipule linear-setaceous ; calyx spreading in flower, erect in fruit, if. Damp 

 woods, Penn. to Can. 2 12'. Scapes with 1 small white flower. June. 



9. DRYAS integrifolia, Valil. On the White Hills of N. H. Prof. 

 Peck (Pursh). On Pike's Peak, Colorado. (A. H. Thompson.) 



10. GEUM, L. AVENS. Calyx 5-cleft, with 5 alternate segments or 

 bractlets smaller and exterior. Pet. 5. Sta. GO. Ach. GO, 



