68, 69.] THE EOOT. 81 



shaped) root thick, succulent, tapering downward, 

 and also for a short space upward. Beet, Radish, and 

 Ginseng are examples. The Conical root tapers all 

 the way from the collum downward (Carrot). The 

 Napiform (turnip-shaped) swells out in its upper part 

 so that its breadth equals or exceeds its length, as in 

 Erigenia (233) and Turnip (239). 



237, Maple an axial, ramous root. 238, Parsnip a fusiform root. 239, Turnip a napiform root. 240, 

 Corallorhiza a coralline root. 



204. The forms of diffuse roots are fibrous, fibro- 

 tuberous, tubercular, coralline, nodulous, and monili- 

 form. The fibrous root consists of numerous thread- 

 like divisions, sent off directly from the base of the 

 stem, with no main or tap-root. Such are the roots of 

 most Grasses, which multiply their fibers excessively 

 in light sandy soils. Fibro-tuberous roots (or fascicu- 

 late) are so called when some of the fibers are thick 

 and fleshy, as in the Asphodel, Crowfoot, Paeony, 

 Orchis, and Dahlia. When the fiber is enlarged in 

 certain parts only, it is nodulous; and when the en- 

 largements occur at regular intervals, it is moniliform 



