APPENDIX. 311 



with minute sharp points (asperous) above ; stolonife- 

 rous. 



T. laxum, Fries Summa, 249. Bah. Mam,, ed. 1, 411. 



T. acutum, Be Cand. Bot. Gall. 529, not Fries. 



Stem prostrate or ascending. Ribs of the leaves, on each of 

 which there is usually a deciduous row of hairs, not so completely- 

 hiding the furrows between them as in T. pungens. Glumes 

 keeled, keel reaching the tip or forming a slight mucro there, often 

 bearing bristles pointing forwards. Lower pale rarely slightly 

 awned. Producing decumbent and ascending barren leafy clus- 

 tered shoots as well as the flowering stems. 



Sandy sea-shores, probably common. 



5. T.jUnceum (Linn) ; spike rather loose; glumes with 9 — 11 

 slender, scarcely elevated ribs, blunt, equalling at least two- 

 thirds of the 4 — 8-flowered spikelet, smooth on the keel ; 

 lower pale blunt, rarely mucronate ; axis smooth or slightly 

 downy; rachis smooth, brittle; leaves involute, with many 

 thick ribs with much spreading hair above; stoloni- 

 ferous. 

 T. junceum, Eng. Bot. t. 814. Parn. t. 63. 



Stem prostrate. The short hairs on the ribs of the leaves 

 spread so as to cover the intermediate spaces. Rachis easily 

 separating above each spikelet. Glumes rounded or truncate at 

 the tip; ribs not extending to the tip. Producing decumbent, 

 barren leafy shoots as well as the flowering stem. 



Sandy sea-shores, common. 



The following table will be useful : 



1. Root fibrous, no stoles T. caninum. 



Stoles long 2. 



2. Lower pale acute or acuminate — 3. 



Lower pale wholly blunt or mucronate 4. 



3. Leaves with slender distant ribs T. repens. 



Leaves with many thick closely placed ribs T. pungens. 



4. Leaves rough above T. acutum. 



Leaves closely downy above T. junceum. 



