134 
Journal of Agricultural Research 
Vol. V, No. 3 
their hosts. In this respect their development is similar to that of 
plants of species of Phoradendron. 
Both C. umbellata and C . pallida very commonly are associated with 
and parasitic upon species of Vaccinium, but are not at all dependent 
upon this genus for host plants. This has especially been noted in the 
case of C. pallida in the States of Colorado, Montana, Nebraska, South 
Dakota, and Wyoming, and in C. umbellata in the States of Con¬ 
necticut, Maryland, Michigan, Minnesota, New Jersey, New York, 
Pennsylvania, Vermont, Virginia, and Wisconsin, and the District of 
Columbia. Plants of both species are parasitic upon a great variety of 
plants belonging to widely different sections of the Spermatophyta. 
No attachment to plants of any member of the Pteridophyta has been 
noted. 
C. umbellata has been found by the writer as a parasite on the roots 
of the following species of plants in the Eastern States: 
Acer rubrum L. 
Achillea millefolium L. 
Andropogon virginicus L. 
Angelica villosa (Walt.) B. S. P. 
Antennaria plantaginifolia (L.) Richards. 
Aster ericoides L. 
Aster macrophyllus L,. 
Aster patens Ait. 
Aster undulatus L. 
Baptisia tinctoria (b.) Br. 
Betula nigra L. 
Betula populifolia Marsh. 
Car ex sp. 
Castanea dentata (Marsh.) Borkh. 
Chimaphila umbellata (L.) Nutt. 
Chrysopsis mariana (L.) Nutt. 
Comptonia peregrina (L.) Coulter. 
Danthonia compressa Austin. 
Fragaria americana (Porter) Britton. 
Fragaria virginiana Duchesne. 
Gaylussacia frondosa (L.) T. and G. 
Hieracium venosum L. 
Ionactis linariifolius (L.) Greene. 
Lespedeza violacea (L.) Pers. 
Lysimachia quadrifolia L. 
Meibomia paniculata (L.) Kuntze. 
Panicum sp. 
Poa compressa L- 
Poa pratensis L. 
Populus tremuloides Michx. 
Potentilla monspeliensis b- 
Quercus coccinea Muenchh. 
Quercus digitata (Marsh.) Sudw. 
Quercus marilandica Muenchh. 
Quercus nana (Wood) Britton. 
Rhus copallina h. 
Rosa blanda Ait. 
Rosa canina L. 
Rubus canadensis L. 
Rubus procumbens Muhl. 
Rubus mllosus Ait. 
Solidago bicolor I*. 
Solidago caesia L. 
Solidago juncea Ait. 
Solidago nemoralis Ait. 
Solidago speciosa Nutt. 
Spiraea salicifolia L. 
Vaccinium atrococcum (A. Gray) Heller. 
Vaccinium nigrum (Wood) Britton. 
Vaccinium vacillans Kahn. 
In addition to the foregoing and incomplete list there must be added 
at least three unidentified species of grasses. 
During the last three years a number of attempts, with varying suc¬ 
cess, have been made at Washington, D. C., to grow plants of C. um¬ 
bellata and C. pallida , both by germinating the seed and by transplanting 
rootstocks to beds and pots in greenhouses. In every case where living 
rootstocks unattached to host plants have been transplanted to pots or 
