69 



but afterwards becomes square, and splits into four valves or 

 pieces, letting out the seeds ; each of these is furnished with a 

 tuft of hairs at the top, and thus is blown away by the wind. 

 The stamens are upright ; the style cross-shaped. The leaves 

 deeply serrate and very hairy. The whole plant much branched. 

 The calyx five-cleft. The petals heart-shaped. 



SMALL FLOWERED HAIRY WILLOW-HERB. E. parviflorum. 



Plate 5,-fiy.l. 

 Leaves a little serrate. Stem not branched. 



This is the only species of the Willow-herb, except the last, 

 which has hairy leaves. It may be known from that by being 

 much smaller, paler in color, and the present plant being very 

 rarely branched ; but it grows in similar situations, and blos- 

 soms at the same time. Leaves in both have no stalks. 



BROAD SMOOTH-LEAVED WILLOW-HERB. E. montanum. 



Plate 5, fig. 2, 

 Leaves ovate, toothed, smooth, short-stalked. 



Grows on cottage roofs, walls, and shady banks, from six 

 inches to a foot in height, and flowers in July. It may be 

 known at once by the leaves, which are quite smooth, and the 

 stigma or top of the style being four- cleft or cross-shaped, 

 which is the case with the two former plants, but not with the 

 next. The flowers are rose-colored, and the stems reddish. 



SQUARE-STALKED WILLOW-HERB. E. tetragonum. 



Plate 5, fig. 3. 

 Leaves lanceolate, toothed, smooth, without stalks. 



Grows on the sides of ditches and such places frequently, is 

 about eighteen inches high, and light green in color. The stems 

 are nearly smooth, somewhat zigzag, and furnished with four 

 projections running along them, which make them appear 

 somewhat square. The leaves are lance- shaped on the lower 

 part of the plant, and oblong above ; all of them sharp -pointed. 

 The flowers are small, pink, and seldom open widely. It flowers 

 in July. The stigma is undivided, and the stamens upright. 



<). S. Rose-bay Willow-Herb, a handsome plant, often cultivated in 

 gardens ; Pale Smooth-Leaved Willow-Herb, rather rare ; Marsh Willow-. 

 Herb, more common; Chickweed-Leaved Willow-Herb, and Alpine Wil- 

 low-Herb, both plants of the Highlands, 



