ROSE TRIBE. 189 



T. reptans (Trailing Tormentil). Fl. all the summer. 

 Perennial. 



SIBBALDIA PROCUMBENS (Procumbent Sibbaldw). 



7. SIBBALDIA. 



1. S. procumbens (Procumbent Sibbaldia). The only 

 British species. A small prostrate plant, with ternate, 

 hairy leaves, and yellowish flowers, growing abundantly 

 on the summits of the Highland mountains. The leaf- 

 lets are wedge-shaped, and end in 3 points. The num- 

 ber of stamens and pistils is very variable. Fl. June, 

 July. Perennial. 



8. COMARUM (Marsh Cinquefoil). 



1. C. palustre (Marsh Cinquefoil). The only species. 

 A herbaceous bog-plant, growing about a foot high, 



