No, 39. 



id7 



lanceolate, acute: flowers in a pyramidal panicle, 



bracts opposite. 



DESCRIPTION— Root triennial, large, yellow, 



rugose, suberose> hard, horizontal, spindle shaped, 

 two feet long sometimes, with few fibres. The whole 

 plant perfectly smooth, stem from five to ten feet high 

 cylindrical, erect, solid, with few bi'anches, except at 

 the top, where they form a part of the pyramidal in- 

 florescence. Leaves, all verticillate, sessile and entire, 

 with a single nerve: the radical leaves form a star 

 spread upon the ground, they are elliptical and obtuse, 

 from five to twelve in number, from ten to eighteen 

 inches long and from three to five broad, constituting 

 the whole plant in the first years, or before the stem 

 grows. The stem leaves are in whorls of four to eight 

 seldom more or less, smaller and narrower than the 

 radical leaves, the'lawest are narrow oblong, the up- 

 per lanceolate, acute, and sometimes undulate^ 



Flowers yellowish v/hite, numerous, large, forming , 

 an elegant pyramidal panicle, the branches of which 

 are axillary to leaves or bracts, unequally verticillate 

 or trichotome: this pyramid Is from one to five feet 

 lono-: the bracts are ternate or opposite, shorter thaa 

 the leaves, broader at the base, acute ; pedicels lax, 

 longer than the flowers, cylindric. Calix deeply four 

 parted, spreading, segments lanceolate, acute, per- 

 sistent, nearly as long as the Corolla, which is one 

 inch in diameter, apen, flat, deeply four parted, with 

 four elliptic cruciate segments, margin somewhat in- 

 flexed, end cucullate obtuse, a large gland in the mid- 

 dle of each, convex on hoth side, ciliatc* The 



four 



r2 



