ENGELMANN—CUSCUTA. 459 
that can furnish them nourishment, even on their own branch- 
es and flowers. This is even the case with the most exclu- 
sive species, C. Epilinum, which attaches itself to all the 
weeds growing in flax fields, and may be cultivated on Vicia, 
Impatiens, and many other plants. Rich nourishment on suc- 
eulent plants expands the organs, enlarges the flowers, in- 
rehensed the whole plant, and thus gives rise to age are which 
times have been distinguished as species; 
in clover fields becomes what has been called 0, Trifotit i 
C. Europea, on vetches, C. Vicie ; C. Gronovii in shaded 
miry soil, on Saururus, C. age yk y the overgrown form of 
C. Africana is C. Capensis 
The haustoria (suckers) ie ade — 8 sepia into 
the tissue of the nurse, and they, with parts 
bedded in this tissue, are able ‘3 ‘reproduce the ogee after al all 
external vestiges vd the stem have been rubbed off. ‘This the 
gardeners often have occasion to deplore in regard ws a varie- 
houses in Europe; I have observed the same fact in different 
— which I have had under cultivation, especially in C. 
The species of Cuscuta naturally arrange themselves in 
three large groups, distinguished by their styles and stig- 
1. Those with two equal styles and elongated stigmata. 
They ane matives re the old eb , exclusively, and have rare- 
ly and only 2099, Soe been introduced with cultivated plants 
into America. (C. Epi East- 
inum with flax into some of our 
ern States, and C. ropea with vetches in Hayti. 
ed Cuscuta proper. ( 
Pfeiffer, Bot. Zeitg. UL 673; Cuscuta, J 
at. pp. 1.) 
2. Those with two unequal tes, and. abirectated, rea 
rapitate, stigmata, They Scene America and Oceanica, and 
Sti 
in the illite and ant eastern parts of Asia; a few species even 
Penetrate into western ae southern Europe, and a sin- 
gle Species is found in —— Africa. emigre has tem- 
Y Introduced one species into Europe (C. racemosa 
me Gt under the name of C. suaveolens). This group 
be comprised ns Grammica, a genus” 
