WILD AND CULTIVATED LILIES IN LATVIA
The Daugava is the largest river in Latvia and the heart of Latvia - Riga lies on its banks. Several habitats of the Daugava lilies are on both banks of the Daugava near Koknese. Koknese is one of the most picturesque spots on the river. The climate there is warmer and dryer than in the rest of Latvia. Many kinds of endangered plants are growing in this territory. The L. martagon var. daugava is also to be taken under particular protection, is is included in the Latvian Red Data Book. Some smaller habitats occur also in other parts of Latvia, e.g. in western Latvia on the banks of the Rojupe, in shrubs of the river valley, and at the Baltic coast in the banks of the river Riva in elm and maple forests.
Last summer I became acquainted with the natural growth conditions of L. martagon var. daugava on the left bank of the Daugava. It was on a slope among bushes, in the shade of hazel, alder and caulescent plants. The soil around the bulbs was calciferous and rich in dolomites. The steep slope was not favorable for bulbs, as no moisture accumulated around them. The surface humus is formed of litter, caulescent plants and others. The data of soil analysis done in the bloom period in July showed that pH/KCl was 7.2,