20 MISSOURI BOTANICAL GARDEN BULLETIN 



ment of ancient warfare, on account of the resemblance of 

 the seed to that instrument. Other common names are water 

 chestnut and Jesuit's nut. In some parts of Europe the 

 seeds are ground into flour and used in bread making. Boasted 

 or boiled, they are used also as a dessert in much the same 

 manner as the Spanish chestnut. Another species of economic 

 value is Trapa hispinosa, a native of India, where, especially 

 in Kashmir, the seeds are said to furnish an article of food 

 for 30,000 people for five months of the year. 



HARDY EXOTIC PLANTS SUITABLE FOR THE GAR- 

 DENS OF MISSOURI AND ADJOINING STATES 



During the year 1920, there was published in the Bulletin 

 a .list of native plants suitable for the gardens of Missouri 

 and adjoining states. This list was arranged according to 

 the habitat of the plant, and in addition to certain informa- 

 tion as to the color of flower, approximate size, etc., some 

 indication was given as to the way in which the plants could 

 be most satisfactorily used. The practical value, to both the 

 amateur and commercial grower, of this arrangement of the 

 wild plants of our region, has been so great that there have 

 been numerous requests for a similar treatment of the cul- 

 tivated plants. There will accordingly be listed in the suc- 

 ceeding numbers of the Bulletin during 1921 the exotic 

 plants suitable for the gardens of Missouri and adjoining 

 states, classified in practically the same manner as were the 

 wild plants. It is hoped that by furnishing this information 

 those interested may be able to make a more intelligent selec- 

 tion of both wild and cultivated plants for use in gardens in 

 and about St. Louis. 



I. HARDY EXOTIC PLANTS FOR ROCK GARDENS 



Approx. 

 Common Approx. Color of time of 

 Botanical name name height flowers bloom Habitat 



PLANTS GROWING IN D RY, SUNNY SITUATIONS 



Alyssum argenteum. .Silvery 



golden-tuft . 8-12". .Yellow. .Summer Europe 



Alyssum saxatile Golden-tuft .. 1' . .Yellow. .Early spring. .Europe 



Aquilegia sibirica .... Siberian 



columbine . 1-2' ..Lilac 



blue. . . Summer Siberia 



Arabis albida Rock-cress ... 4-6" . .White. . .Early spring. .Europe 



Arabis alpina Rock-cress ... 6-8" . .White. . .Early spring. .Europe 



Arenaria grandiflora. Sandwort 4-6" . .White. . April- June ...Europe 



Arenaria verna Sandwort 1-3" . .White. . April- June ...Europe 



