HEXANDBIA-TRIGYNIA. 



4. R. obtusifolius, stem roughish ; radical leaves heart-shaped, 

 obtuse ; permanent petals toothed, one principally tuberculated. 

 Common Dock. 



Hob. Waste ground and pastures. July, Aug. 11 



* * Flowers separated. 



3. R. acetosa, leaves oblong, arrow-shaped; flowers dioecious ; 

 permanent petals tuberculated. Common Sorrel. 

 Hob. Meadows and pastures. June. If. 



The leaves are an agreeable acid ; and in France the plant 

 is commonly cultivated for use at the table. The Lap- 

 landers mix a strong decoction of the leaves with their 

 rein-deer milk, which is then capable of being preserved 

 for use from autumn till the ensuing summer, and es- 

 teemed as an agreeable and wholesome food. 



6. R. acetosella, leaves lanceolate, hastate; flowers dioecious; 

 permanent petals without tubercles. Sheep's Sorrel. 



Hob. Barren pastures and on heaths. June, July. If. 



TOFIELDIA palustris was found by BAY " juxta rivulum non 

 procul Bervwo in Scotia." Syn. 375. We have sought for it 

 in vain, and, perhaps, by the " Bervico in Scotia," North- 

 Berwick may be intended. 



121. TBIGLOCHIN, 



1. T. palustre, capsule nearly linear, of 3 cells, tapering at the 

 base ; root fibrous. Marsh Arrow-grass. 



Hob. Bogs and marshy places. July, Aug. If. 



2. T. maritimum, capsule ovate, of 6 cells. Sea Arrow-grass. 



Hab. Abundant on marshy spots on all our coasts, and at 

 the sides of the river within the influence of the tide. 

 May, August. If. 



Cattle and sheep are fond of the herbage of these plants, 

 which are probably very salutary to them from the salt 

 they contain. 



