CBRTAISr QBNTIANACEAE. 91 



which he proposes as a new generic type De Oandolle's Scilla 

 pomeridiana, which I knew to be a familiar Oalifornian plant, 

 commoaly called Chlorogalum pomeridianum. This last generic 

 name I recalled as certainly not published until a later date 

 han this Laothoe of Eafinesqae; and a subsequent comparison 

 of the dates results in a showing of seven years of priority for 

 Laothoe ; and I find that Mr. Jackson both gave this name a 

 place in the Index Kewensis as a synonym, and also i-emarked 

 its right of priority over the name assigned by Kunth in 1843. 



At Rafinesque's date of 1836, only one species was known • 

 bat nosv there are a half-dozen, all having been published under 

 the name of Chlorogalum, which can have no other status by right 

 than that of a synonym of laothoe, the recognized species of 

 which are 



L. AuausTiFOLiA. (Kell. Oalif. Acad. ii. 104). 



L. DIVARIOATA. (Kunth. Enum. iv. 683). 



L. Lbiohtlinii. (Baker, Gard. Chron. for 1874, p. 689). 



L. PARVIFLORA. (Wats. Proc. Am. Acad. xiv. 343). 



L. POMERIDIANA. (Ker.) Eaf. Fl. Tell. iii. 53. 



L. PURPUREA. (Brandg. Zoe, iv. 159). 



On Cert.iia Geiitianaceae. 



Regarding my interpretation of the habitat of Pursh's Swer- 

 tia fasiigiata, gi yen on page 73 preceding, I have been persuaded 

 by Mr. 0. V. Piper that Pursh must be understood as meaning 

 not on this side, but the other side of the Rocky Mountains ; 

 and I have little reason to controvert such an opinion in the 

 presence of one who, like Mr. Piper, has lived and travel- 

 led along the route of the Lewis and Clarke expedition, and 

 has particularly studied that route. Admitting, then, the 

 correctaess of Mr. Piper as to where the gentianaceous herb in 

 question must have been gathered, it may have to be conceded 

 that Pursh's Swertia probably is what high authorities have 

 maintained that it is, namely, Frasera thyrsiflora, Hook. 

 Against this view it may be objected that, inasmuch as Pursh 



