2S4 



ROSACEAE 



Vol. II. 



4. Rosa pratincola Greene. Arkansas Rose. 

 Fig. 2310. 



Rosa praliiicola Greene, Piltonia 4: 13. 1899. 



Erect, low, i-2 high. Stems densely prickly with 

 very slender bristles; infrastipular spines none; stipules 

 rather narrow, sometimes toothed above; leaflets 7-1 1, 

 oval or obovate, sessile or nearly so, obtuse at the apex, 

 narrowed or often cuneate at the base, seldom over l' 

 long, simply and sharply serrate, glabrous on both 

 sides ; flowers corj-mbose or rarely solitarj', about 2' 

 broad ; sepals lanceolate, acuminate, sparingly glandular- 

 hispid or glabrous, or sometimes lobed, persistent and 

 spreading or reflexed ; styles distinct; fruit globose or 

 nearly so, 4"-6" in diameter, glabrous or bristly. 



Prairies, Manitoba to Minnesota, Iowa, Missouri, Ne- 

 braska, Colorado, Texas and New Mexico. June-July. 

 Confused in our first edition with Rosa arkansana Porter. 



Rosa spinosissima L.. scotch rose, with densely prickly 

 stems, small roundish leaflets glabrous or nearly so, small 

 pinkish or white flowers and globose black fruit, is locally 

 escaped from cultivation. It is native of Europe and Asia. 



5. Rosa Woodsii I.indl. Woods' Rose. 

 Fig. 231 1. 



Rosa Woodsii Lindl. Mon. Ros. 21. 1820. 



Rosa Fendleri Crepin, Bulk Soc. Bot. Belg. 15 : 91. 1876. 



Low, bushy, i-3 high, armed with slender 

 mostly straight spines, or naked above. Infrastip- 

 ular spines commonly present; stipules rather broad, 

 entire; leaflets 5-9, oval or obovate,. short-stalked or 

 sessile, obtusish at the apex, narrowed or cuneate at 

 the base, s"-i8" long, simply and sharply serrate, 

 somewhat glaucous beneath; flowers i'-2' broad, 

 corymbose or solitary, short-pedicelled ; sepals lan- 

 ceolate, acuminate, laterally lobed or entire, erect 

 and persistent on the fruit ; styles distinct ; fruit glo- 

 bose or globose-ovoid, 4"-s" in diameter, glabrous, 

 sometimes glaucous. 



Pra'ries, Minnesota to Missouri, the Northwest Terri- 

 tory, New Mexico and Colorado. June-July. 



6. Rosa canina L. Dog Rose. Canker Rose. 

 Wild Brier. Flip-tree or -rose. Fig. 2312. 



Rosa canina L. Sp. PI. 491. 1753. 



Branches erect or straggling, sometimes 10 long, 

 armed with stout short hooked spines, not bristly but 

 sometimes glandular. Stipules broad, glandular; leaf- 

 lets 5-7, ovate or oval, rather thick, generally obtuse 

 at each end, usually simply and sharply serrate, some- 

 times pubescent beneath, glabrous or nearly so above, 

 I'-ii' long; flowers solitary or few, pink varying to 

 white ; calyx-lobes much lobed, lanceolate, reflexed ; 

 styles distinct ; fruit long-ovoid, 6"-g" long, usually 

 glabrous. 



In waste places, especially along roadsides. Nova Scotia 

 to western New Jersey and eastern Pennsylvania, Virginia 

 and Tennessee. Naturalized or adventive from Europe ; 

 native also in northern Asia. Cat-whin. Canker-blooms 

 (Shakspere). Bramble-brier or brere-rose. Lawyers (i. e. 

 an old thorny stem). Soldiers. Hedge-peak. Dog-thorn. 

 Horse-bramble. Bird-brier. Bedeguar. June-July. 



