XUTTALL A^'D PURS II. 81 



which Mr. Pursh named in honor of its discoverer, Lewisia 

 rediviva. 



Another of the plants whose head of small white flowers 

 greets ns early in the spring is the little nmbellifer, which 

 now is C ymopterus acaule (Pursh) Byd. It was first described 

 by Mr. Pnrsli as SeJimtm acaide. lie got it from Mr. Brad- 

 bury's collection from "Upper Louisiana." Mr. Xiittall, who 

 also collected it on the same expedition with Mr. Bradbury, 

 says of it: "On the plains of the Missouri, commencing forty 

 miles below tlie confluence of the White river. Flowerina; in 

 ]\Iay and June." 



One of the early flowering plants of the plains is a little 

 yellow Violet, (Tiola- NuitaUl Pursh). Mr. Pursh Indicates 

 that he had seen it in ]\Ir. jS^uttalFs herbarium and that it 

 came from the banks of the Missouri. Mr. K"uttall notes that 

 ''it is the only species of Viola on the plains of the Missouri 

 from the confluence of the river Platte to Fort Mandan." 



A little shrubby i>lant, quite rare in Colorado, Mr. Pursh 

 named Amorpha microphyUa, and remarks that he had seen it 

 in ''Herb. Lewis." It is therefore one of the plants first col- 

 lected by Meriwerther Lewis. But Mr. ISfuttall had already 

 named and described it in Fraser's Catalogue as Amorpha nana, 

 by which name it is still known. Mr. ^NTuttall says that it is 

 found "On the woodless and grassy hills of the Missouri, from 

 the Platte to the mountains, growing only from six inches to 

 a foot high. Flowers purplish blue and fragrant, coming out 

 in the month of May." 



Then there are Pentstemon angustifolius Pursh, one of the 

 many beautiful s^Decies of this genus; Gaura cocinea Null, 

 which belongs to the Evening Primrose family; Rumex venosiis 

 Pursh; Troximon glaunim and Troximon cuspidahnn Pursh, 

 plants which blossom w^ith the dandelions and resemble them ; 

 Erigeron pumilum Nntt and Asragalus Missouriends Nutt. 

 And so quite a list of jjlants which greet the eye in spring-time — 

 as well as many later ones — Avere first made known to science 

 in the publications of ]Sruttall and Pursh. 



