EXPERIMENTS IN THE GROWTH OF PYRETHRUM. O71 
small insects, of which I send you specimens, and the bumblebee seem 
to use the blooms without hurt. 
[The insect mentioned is Cerotoma caminea, Fabr. | 
New York. Rochester, June 11, 1882.—M. ALDEN. 
The seeds of Pyrethrum roseum sent to me fifteen months ago were 
divided into two parts and planted: Ist, in a gravelly loam—these 
did not live: 2d, in a flower bed partially shaded in summer, having a 
southern exposure, and composed of leaf-mold, one-half; well-rotted cow 
manure, one-fourth; clay, one-tourth. Liberal additions of waste cof- 
fee-grounds have been thrown on this bed from time to time. ‘The py- 
rethrum planted there is in fine condition, and is now in bud; the 
plants are about 18 inches high. They did not flower last summer, and 
the roots were left out all winter, protected by three inches of leaves and 
manure. | 
PENNSYLVANIA. New Bloomfield, October 2, 1883.—K. W. CLAYPOLE. 
{n the spring of 1881 you sent me some seed of the Persian insect- 
plant, P. roseum. I sowed some of it and it came up well. It grew 
through the summer in a box and was left out through the winter. The 
roots being much exposed by the sides of the box were liable to be killed 
by frost. Yet it lived. I was away from home during the cold part of 
the winter, which came before Christmas, but at my return the plants 
were alive and continued so, at least some of them, until they began to 
grow in the spring, when, unfortunately, they were. forgotten and ex- 
posed to a cold rain and sudden hard frost in March, which killed them 
in the growing state. In the spring of 1882 I sowed again some of the 
same seed, which I had kept over, and also some of the Dalmatian species, 
P cinerariefolium. Both came up well. The seed leaves of the latter 
were less spatulate than those of the former, and the later leaves came 
more freely. Altogether, the latter is the. more freely growing plant. 
They flourish well through the summer, and though the winter was a 
very cold one (in Pennsylvania), yet with very little shelter (such as 
that of an open shed or an unwarmed room) they survived it, and in 
the spring began to grow very early. May add that the Dalmatian 
species was evergreen, retaining its leaves all the winter. The other 
was not. Inthe spring I planted them in an open border, where they 
grew well and flowered, especially the Persian plant, the flowers being 
-crimson, magenta, and white. The other species did not bloom as freely. 
-I do not know how they will bear the winter in the ground, but the 
probability is in their favor. Judging from appearances the seed of 
neither species was matured. 
8993—Bul. 4—7 
