APPENDIX. 309 



2. Panicle drooping. Sheaths of the leaves 



nearly glabrous. Florets loosely imbri- 

 cate, becoming distinct and cylindrical 

 with fruit S. secalinus. 



Panicle erect. Sheaths of the leaves hairy 

 (except sometimes the upper ones). Flo- 

 rets imbricate both with flower and fruit, 

 not cylindrical S. racemosus. , 



3. Glumes and pales downy S. mollis. 



Glumes and pales nearly or quite glabrous 4. 



4. Pales unequal in length ; lower equally 



ribbed. Branches of panicle bearing one 



or two spikelets S. commutatus. 



Pales equal in length ; lower with two pro- 

 minent ribs near each margin. Branches 

 of panicle usually with more than two 

 spikelets, very long S. arvensis. 



No. VII. On Tbiticum. 



The account of the species of Triticum in my Manual is in- 

 correct. I am indebted to the description in Boreau's valuable 

 Flore du centre de la France, edition 3, for a clear view of them. 

 The following seem correct definitions of our British species. 



1. T. caninum (Huds.); spike rather close; spikelets 2 — 5- 

 flowered ; 3 — 5-ribbed glumes and lower pales awned ; axis 

 and edges of the rachis hispid ; leaves flat, rough on both 

 sides ; root fibrous. 

 T. caninum, Eng. Bot. t. 1372. Parn. Grasses, t. 62. 



Stem erect. Ribs on the upper side of the leaves very slender. 

 Glumes rounded on the back; ribs reaching to the tip and joining 

 to form the short awn. Lower pale shorter than its awn ; or in an 

 alpine few-flowered form longer than it. 



Hedge-banks and thickets. 



