244 Plants collected during a journey 



EUPHORCIACEiE. 



397. Euphorbia marginata, Purshjl. ii. p. 607. Spreng. 

 syst. iii. p. 795. non Kunth. Sources of the Platte. Annual. 



Obs. A beautiful species, now cultivated in many of the 

 gardens about New-York, from seeds collected by Dr. James. 

 This appears to be a distinct plant from Kunth's, described 

 under the same name (Syn. i. p. 390.) ; that being perennial, 

 with the leaves narrowed at the base. 



398. E. hexagona, Nutt. Spreng. syst. iii. p. 791. 

 Sources of the Canadian. Found also on the Arkansa, by 

 Mr. Nuttall. A tall, slender, much branched species, with 

 linear leaves, and small flowers in axillary clusters. 



399. E. obtusata, Purshjl. i. p. G06. On the Missouri. 



400. E. portulacoides, Willd? Purshjl. i. p. 606. 

 On the Missouri, near Franklin. 



Obs. Probably distinct from the Peruvian plant. Stem 

 dichotomous ; leaves oblong, refuse ; flowers axillary, on 

 pedicels about half as long as the leaves. Whole plant very 

 smooth ; much resembling E. polygonifolia. Annual. Mr. 

 Nuttall found the same on the Arkansa. 



401. E. corollata, L. Willd. sp. ii. p. 916. On the 

 Canadian. 



402. E. hypericifolia, Willd. 1. c. ii. p. 895. On the 

 Missouri. 



403. Ditaxis ? On the Canadian. I have specimens 

 of the same plant from Mr. Nuttall, which he collected on the 

 Arkansa. They are labelled, " A new genus allied to Mer- 

 curialis," but at the time he named them there was no good 

 description of Ditaxis published. Our plant agrees minutely 

 with the detailed character of this genus, as given by Kunth, 

 (Synop. iv. p. 204.) but Ditaxis dioica, the only species re- 

 corded, is arborescent, whilst this is herbaceous. 



