110 DICOTYLEDONOUS PLANTS. 



corymbs, rarely solitary ; lobes of the calyx very long, appendaged, 

 spreading; fruit depressed-globose, hispid, rarely smooth. R. corym- 

 bosa Ehrh. R. pennsylvanica Mich. R. Jiorida Don. 



HAB. Swamps, Can. to Car. W. to Miss. June, July. >> . 

 Shrub 38 feet high. Flowers 5 7 in terminal corymbs. Pe- 

 tals large, red, obovate, emarginate. Petioles tomentose. A 

 very variable species, including the above and some others which 

 have been described as distinct species. A variety ? of this 

 species occurs on an Island near Troy, N. Y. with the stems uni- 

 formly and constantly smooth, except very near the root, where 

 there are sometimes a few slender prickles. This, and a slight 

 difference in the shape of the fruit, which is depressed-globose, 

 led me to believe it a distinct species. 



*** Styles free. Fruit ovate, rardy globose. Prickles fao, not stipular. 



6. R. gemeUa Willd. : stipular prickles uncinate, in pairs ; leafets 

 5 7, oblong, acute, opaque, pubescent beneath ; flowers mostly in 

 pairs ; fruit depressed-globose, and with the peduncles glabrous. 



HAB. Dry hills. N. Eng. to Car. Pursh. July. *>. Shrub 

 low, with large red flowers. This species is considered by De 

 Candolle a variety of the R. cinnamomea, differing from it only in 

 being more slender and nearly unarmed, and in having the sti- 

 pules narrower. But this, as well as several other points con- 

 nected with our roses, must remain doubtful until they have been 

 more attentively studied. 



7. R. stricta Muhl. : very branching; branches with numerous slender 

 prickles below, naked at the apex ; leafets 7 9, ovate, obtuse, some- 

 what rigid; peduncles hispid ; fruit small, elongated. 



HAB. N. Eng. and Penn. De Candolle, from whom the above 

 description and locality are quoted, thinks it may be a variety of 

 R. alpma. 



8. R. rubiginosa Lmn. : prickles strong, compressed, uncinate, rarely 

 straight ; leafets 57, ovate or somewhat rounded, serrate, more or 

 less, especially beneath glandular and ferriginous ; fruit elliptical, 

 short, and with the peduncles hispid. R. } suaveolens Pursh. Ett. 



a. pubera DC Cand. : flowers subsolitary ; fruit ovate, smooth ; 

 peduncles glandular-hispid ; leafets roundish, glandular beneath, 

 and with the petioles somewhat pubescent. R. micrantJia 

 Smith. Big. 



HAB. Hedges and hill sides. Can. to Car. July. T?.Mrut> 

 tall and slender. Floicers solitary, or 2 or 3 together, pale red. 

 Fruit orange red. A very variable species. Var. a. is found 

 near Boston. Siceet-briar. 



ORDER XXXVIII. POMACES. Lind. 



Calyx 5-toothed, the odd segment superior. Petals 5, un- 

 guiculate. Stamens indefinite. Disk thin, lining the tube of 

 the calyx, bearing the petals and stamens on its margin. Ova- 



