The water rat or vole sometimes attacks water-lilies in natural lakes, destroying the roots or eating the hearts of the flowers. Trapping and shooting are the only remedies. Water Gardening (1938)
’’M. didyma’’ (Bee-Balm; Oswego Tea). Robust plants with brilliant flowers, often grown on the banks of streams and lakes for the colour they impart to the surroundings. In masses they form striking effects … Water Gardening (1938)
C. Quamash (C. esculenta of Lindley). A robust species, growing about 2 ft. high, with large dark blue flowers, the irregularly spaces segments of which are twisted and wither independently. Western North America. Water Gardening (1938)
Nymphaea elegans ( Señorita Water-lily] is a of a delicate lavender-blue shade with golden stamens tipped with blue. It is very free, but the flowers are small, rarely more than 3 or 4 in. across. It hails from Mexico and Texas. Water Gardening (1938)