©r NORTH AlVIBUICA. 73 



an aHiga^or, and in fact they are covered above 

 with hard and rough warts whence my name. 



9 0. Baldiiina bicolor Raf. nearly smooth, 

 stem grooved n ked above uniflore, leaves scat- 

 tered sessile narrow cuneate obtuse entire,scales 

 of perianthe adpressed broadly ovate acute, 12 

 white rays cuneate unequaly trifid — another sp. 

 of the real G. Balduina, habit exactly similar, 

 but flowis larger with white rays and yellow 

 disk. B. uniflora which I have must now be 

 called B. luten. This was found by Leconte 

 in Florida or Georgia and deemed a N. G. in 

 Coll. herb, stem pedal, leaves uncial becoming 

 less upwards, rays larger than in B. luteUj 

 which has a leafy stem, the peduncle incrassate 

 leaves broader adpressed and not crowded. 



921. Stevia ovata Raf. herbaceous pubes- 

 cent, leaves opposite ovate acute serrate tri- 

 nerve, corymb fa^tigiate, perianthe 4flore with 

 4 segments linear oblong acute, pappus of 4 

 short obtuse scales. — Texas and Arkanzas, col- 

 lected by Walton, stem pedal, leaves small 

 hardly uncial opposite subsessile, flowers yellow, 

 florets tubular 4fid obtuse, stamens inclosed, 

 seeds linear smooth compressed, crown or pap- 

 pus or 4 very short obtuse scariose scales. 

 Probably a subgenus Efetra by the disposition 

 in 4 &c. All the N. Amer. sp. akin to Stevia 

 appear to deviate as the 2 next Genera evince, 

 even the Mexican sp. include 2, other G. the 

 Mustella of Sprengel with double pappus, and 

 my Tomista for St. pedata with perianthe 

 camp, pappus truncate. 



922. OTHAKE Raf. diflf. Stevia, perianthe 

 turbinate subSflore, segments about 8 nervose, 

 florets with slender tube, limb ns long 5parted, 

 anthers subsessile exerted, style elongate hispid, 



10 



