82 HEXANDRIA TRIGYNIA. 



Hal. Hedges occasionally. Between Bichardson's-stead 

 and Scrammerston. Near Gainslaw. June, fy 



The leaves are in general more or less covered with a small 

 orange-coloured fungus, whence seems to have originated 

 an opinion, entertained by many practical farmers, that 

 the barberry is injurious to corn, by infecting it with the 

 mildew. To determine the accuracy of this opinion, it 

 should first be proved that the mildew of the barberry 

 and of corn is owing to the same species of fungus. 



The flowers are worthy the attention of the student. 

 The inner part of each filament, near the bottom, is so ir- 

 ritable, that, when touched by any extraneous body, it im- 

 mediately contracts, and strikes its anther, full of pollen, 

 against the stigma. A fuller account of this curious cir- 

 cumstance the student will find in SMITH'S Introduction, 

 p. 248 ; and the reflections which it is calculated to raise 

 would be misplaced here. 



II. TRIGYNIA. 

 120. RUMEX. 



* Flowers all perfect. 



1. R. sangwneW) leaves lanceolate, acute, (veined with red), 

 the radical ones heart-shaped at the base ; permanent petals en- 

 tire, oblong, one of them at least tuberculated. Bloody-veined 

 Dock. 



Hob. Woods at Netherbyres, Berwickshire, plentiful, 

 Rev. A. Baird. July. I/. 



2. R. crispus, leaves lanceolate, acute, undulated and crisped 

 at the edges ; permanent petals ovate, entire, all tuberculated. 

 Curled Dock. 



Hob. Waste ground and road sides. July. I/. 



3. R. acutus, leaves oblong -heart -shaped, pointed; clusters 

 leafy ; permanent petals oblong, obscurely toothed, all tubercu- 

 lated. Sharp Dock. 



Hab. Watery places. Sides of the pond below Calf-hill ; 

 and of the footpath above the Old Castle. July. If 



