182 Trans. Acad. Sci. of St. Louis. 



be referred to any of the described species. I therefore began 

 an examination of all the specimens of this genus collected in 

 Texas which I had in hand, together with the mounted mate- 

 rial of the herbarium of the Missouri Botanical Garden, and 

 that of the United States National Museum,* which through 

 the kindness of Dr. Win. Trelease and Mr. Richard Kathbun, 

 was placed in my hands for study. To these gentlemeu, and 

 especially to Dr. J. N. Rose, of the United States National 

 Museum, who has long studied this genus and has kindly given 

 me assistance, I am under man} r obligations.! 



It may perhaps be considered b} 7 some that I have increased 

 unnecessarily the number of species, but I have endeavored 

 to be as consistent as possible in my treatment, and I am 

 unable to refer the type specimens, upon which are based the 

 following new species, to any of those already described. 



Of the 18 species herein treated from Texas, such diverse 

 species as T. scopulorum ,1 T. Texana,§ T. occidenfalis, T. 

 rejfexa, T. hirsuticaulis || and T. humilisyi have been referred 

 to T. Virginiana, which in its typical form has not been 

 detected in the State. 



As understood by me, the plant upon which Linneus 

 founded his T. Virginiana is well exemplified in such collec- 

 tions as Lloyd, Cincinnati, O., May 26, 1890, and H. S. 

 Hilburn, New Jersey, June 2, 1888, and ranges from Mas- 

 sachusetts and Connecticut to North Carolina, Georgia and 

 Mississippi, west to Wisconsin, Missouri and northern 

 Arkansas, and is quite constant in having smooth stems, large 

 flowers, and very wide, long leaves. 



After a careful study of a large number of specimens, I 

 offer for the Texas species the following: — 



* For the sake of convenience, I have used the letters M and N to sig- 

 nify specimens from the Herbarium of the Missouri Botanical Garden, and 

 the United States National Herbarium, respectively. 



t Since the above was written, I am under still further obligations to Dr. 

 Rose, who has read the manuscript and has kindly made a number of cor- 

 rections and changes in the paper. 



X Rose, Contr. U. S. Nat. Herb. 5: 205. (1899). 



§ See below. 



|| Small, Bull. Torr. Bot. Club. 24: 233. (1897). 



If Rose, Contr. U. S. Nat. Herb. 5: 204. (1899). 



