TUBS IN WATER-GARDENS 131 



This is done by lighting a wisp of straw placed in each. 

 The wood is saturated with mineral oil which soon 

 catches fire. The whole inside is allowed to blaze for 

 three or four minutes, till it has a completely car- 

 bonised coating, which forms the best preservative 

 from decay. The fire is put out by turning the tubs 

 upside down. 



Any of the marsh plants already mentioned will do 

 in the moist area, but in addition other small plants 

 may be named. The yellow Mountain Saxifrage 

 (S. aizoides\ the Alpine Campanula barbata, the North 

 American Rhexia virginica, and the pretty native Bog 

 Asphodel ; and on the shady side Epigcea repens. 



The following groups will also come well : the deli- 

 cate Fern, Nephrodium Thelipteris, with Nierembergia 

 rivularis and the Water Forget-me-not ; Galax aphylla, 

 Shortia galacifolia, and Cornus canadensis ; the double 

 Cuckoo-flower^ and the neat Cardamine trifoliata ; the 

 lovely little Houstonia, with the dainty creeping foliage 

 of Sibthorpia ; the brilliant blue Gentiana bavarica by 

 itself ; the violet-like Butterwort also alone ; Primula 

 rosea and P. involucrata Monroi and the fairy-like 

 P. farinosa ; then severally, the American Helonias, 

 Gentiana Pneumonanthe, and in the more backward 

 places where rather larger plants will have space, 

 Cypripedium spectabile, Gentiana asclepiadea, and, if in 

 shade, the handsome American Fern, Onoclea sensibilis. 

 Any bare spaces, when the little garden is first planted, 

 can be filled with Mossy Saxifrages, and the wettest 

 places with Sphagnum moss, whose presence is a com- 

 fort to many of the plants of the peat bog. 



