ob' MORPHOLOGY OF THK I:OOT. 



resemble butterflies or other insects; as, for example, Oneidium 

 1'apilio. Fig. 1'2. Epiphytic orchids arc indigenous to the United 

 States only from < ieorgia to Texas, and only in humble forms, 

 in company with species of Tillandsia, representing liromeliace- 

 ous epiphytes. The commonest of the latter tribe, and of most 

 northern range, is the T. usneoides, the so-called Long Moss, 

 which, pendent in long and tangled gra}" clusters or festoons from 

 the branches of the Live-Oak or Long-leaved Pine, gives such a 

 peculiar and sombre aspect to the forests of the warmer portions 

 of our Southern States. 



61. Parasitic Plants have the peculiarity that their roots, or 

 what answer to roots, not only lix themselves to other plants, 

 luit draw therefrom their nourishment, at least in part. Among 

 crvptoii'anious plants very many Fungi art' parasitic upon or 

 within living plants or animals. But only ph;cnogamous para- 

 sites arc here under consideration. These may be divided into 

 two classes: those with and those without green foliage. 



62. (.iTni Parasites may be cither wholly or partially parasitic ; 

 that is. they may draw all their support from a foster plant, or 



i'ic,. 7i'. Oncidium Papillo, and, 73, Comparettla roeea ; two showy epiphytes of the 



Orchis family; showing tin- moilc in which I lirsu Air-plants grow. 



