218 ROSACE.E. Rosa. 



Tribe III. ROSEjE. Juss. 



CahiT b-partcd, spirally imbricated ; the tube urceolate, contracted at the mouth, at length 

 fleshy or baccate, including the numerous distinct ovaries. Stamens numerous. Achenia 

 bony, hairy, inserted on the whole inner surface of the disk that lines the tube of the 

 calyx : styles terminal, distinct, or cohering into a column above. — Shrubby and prickly 

 plants, with pinnate leaves {in Hcltheimia or Lowea, which is hardly a distinct genus, 

 reduced to a single leaflet), and mostly adnate stipules. Flowers large, showy and 

 odorous. 



15. ROSA. Tourn.; Linn.; Lindl. monogr. Ros. {1820). rose. 



[ Derived from the Celtic word rhos, signifying red; the prevailing color of the flowers.] 

 Character same as of that of the tribe. Stipules present. 



1. Rosa Carolina, Linn. Swamp Rose. 



Stem smooth, armed with stout recurved mostly stipular prickles, not bristly ; leaflets 

 5-9 (rarely 9), elliptical, often acuminate, finely serrate, not shining above , the lower 

 surface (as well as the petiole) puberulent and pale ; stipules long and narrow, the margins 

 involute ; flowers corymbose ; calyx and peduncles glandular-hispid ; sepals mostly entire, 

 with foliaceous terminations ; fruit depressed-globose, mostly somewhat glandular-hispid. — 

 Linn. spec. (ed. 2.) 1. p. 703 ; Pursh, fl. 1. p. 341 ; Ell. sk. 1. p. 565 ; Lindl. Ros. p. 23. 

 t. 4 ; Torr. fl.l. p. 486 ; DC. prodr. 2. p. 605 ; Hook. fl. Bor.-Am. 1. p. 199 ; Darlingt. 

 fl. Cest. p.ZU; Torr. ^ Gr. fl. N. Am. 1. p. 458. R. corymbosa, Ehrh. heitr. 4. p. 21. 

 R. Pennsylvanica, Michx. fl. 1. p. 296 (partly). R. Caroliniana, Bigel. fl. Bost. p. 197. 



Stem 3-6 feet high, armed with short but strong broad slightly recurved prickles. Leaf- 

 lets 1-2 inches long, acute at the base, and furnished with short partial footstalks ; the 

 petiole commonly a little prickly, as well as bristly and glandular. Flowers terminal, 4-7 

 in each corymb, crowded. Sepals ovate-lanceolate, tapering into a long slender point which 

 is somewhat leafy at the extremity. Petals purple, nearly an inch long. Fruit dark red and 

 shining when mature, usually hispid, seldom quite smooth. 



Swamps and wet thickets ; common. June - July. Sometimes the fruit is a little elongated, 

 and acute at the base ; but in such cases I have generally found that the change was produced 

 by insects stinging the young calyx-tube, and lodging their eggs inside. 



2. Rosa lucida, Ehrh. Dwarf Wild Rose. 



Stem armed with numerous scattered and stipular, unequal, mostly deciduous prickles ; 

 those of the flowering branches stipular, slender, straight or slightly recurved, or sometimes 

 wanting ; leaflets mostly 7 (sometimes 5 or 9), elliptical, sharply serrate, smooth and shining 

 above ; petioles somewhat glandular or hispid ; stipules dilated ; flowers 1 - 3 ; the calyx- 



