MISSOURI BOTANICAL GARDEN BULLETIN 31 
7. Distilled water (no salts or other nutrients present), 
which will permit growth to continue slowly for a few weeks. 
8. Full nutrient solution (weak) containing all necessary 
mineral constituents, which will permit continuous growth. 
9. Full nutrient solution lacking calcium, showing slight 
growth, and emphasizing the special need of this as a nutrient 
and antagonistic agent for the best growth of peas. 
10. Full nutrient solution lacking nitrogen; considerable 
stale however, being still supplied through the cotyle- 
ons. . 
FLORAL DISPLAY 
On account of contemplated improvements in the north 
wing of the new conservatories the flowering plants were 
removed to the south wing, which, with the additional flower- 
ing material and foliage plants, presents a most attractive 
appearance. Although the bright colored Christmas flowers 
have largely passed, and it is yet too early for the typical 
Easter plants, a pleasing floral display has been arranged to 
follow the poinsettias, primulas, azaleas, solanums, cycla- 
men, begonias, etc., of the January exhibit. Some of the 
January plants are still showy and have been distributed in 
_ other houses of the new range, notably in the economic house, 
where at the present time several hundred plants of begonia 
“Erfordii,” with their clear pink flowers, are providing a 
pleasing bit of color. 
In the first wing of the display house a dozen standard 
genistas (Genista canariensis) are the most striking plants. 
The flowers of bright yellow show up strikingly against the 
silvery green background of their avi uch standard 
forms are produced only after much patient effort on the part 
of the grower, and require considerable time and skill for 
their production. At the International Flower Show in New 
York last year, standard genistas were among the most at- 
tractive specimens shown. The plant belongs to the pea 
family, and the close observer will note the similarity in their 
flowers to those of peas, beans, etc. The dozen plants in the 
Garden collection are arranged on either side of the central 
walk, and the spaces between them and extending back to the 
foliage plants are filled with bright colored cinerarias. These 
plants, with their large green leaves and immense heads of 
showy flowers, are always a source of interest and pleasure. 
In color the flowers show an almost endless variation from 
the more delicate shades to the most intense colors imagin- 
