ROSACEAE. 



123 



ROSA. 

 (Family Rosaceae). 



Shrubs, mostly armed with 

 prickles, occasionally trailing or 

 scrambling: deciduous or excep- 

 tionally evergreen. Shoots moder- 

 ate, terete: pith relatively large, 

 brownish, rounded. Buds rather 

 small, solitary, sessile, ovoid, with 

 3 or 4 exposed scales, sometimes 

 a little above the axil. Leaf-scars 

 alternate, low, narrowly and 

 shallowly U-shaped or almost lin- 

 ear: bundle-traces 3: stipule- 

 scars lacking. Suckers are usually 

 more prickly than the ordinary 

 branches, from which characters 

 are taken here. 



Winter-character references: 

 Rosa alpina. Bosemann, 44. R. 

 arvensis. Bosemann, 44. R. bal- 

 tica. Bosemann, 44. R. canina. 

 Bosemann, 45; Fant, 23, f. 21; 



Ward, 1:201, f. 102; Willkomm, 36, f. 55. R. carelica. Fant, 

 24. R. centifolia. Bosemann, 45. R. centifolia muscosa. 

 Bosemann, 45. R. cinnamomea. Bosemann, 45; Fant, 24. R. 

 collina. Fant, 24. R. coriifolia. Fant, 24. R. gallica. Bose- 

 mann, 44. R. inodora. Fant, 23. R. lucida. Bosemann, 44. R. 

 lutea. Bosemann, 45. R. mollissima. Fant, 24. R. multiflora. 

 Shirasawa, 250. R. pimpinellae folia. Bosemann, 44. R. pomi- 

 fera. Bosemann, 45; Fant, 24. R. pratincola. Hitchcock (3), 

 14, (4), 136, f. 69-70. R. pumila. Bosemann, 45. R. ruMginosa. 

 Bosemann, 46; Fant, 23; Schneider, f. 147. R. spinosissima. 

 Schneider, f. 147. R. tomentosa. Fant, 24. R. turbinata. Bose- 

 mann, 44. 



