246 Plants collected during a journey 



409. Ricinis communis, L. On the Arkansa, near the 

 junction of the Canadian, apparently indigenous, but more 

 probably introduced. 



URTICEiE. 



410. Humulus Lupulus, L. Willd. sp. pi. iv. p. 769. 

 Purshfl. i. p. 199. On the Missouri, and about the base of 

 the Rocky Mountains ; indigenous. 



411. Pakietaria pennsylvanica, JFilld. 1. c. p. 955. 

 Purshfl. i. p. 114. 



412. Moitus rubra, L. Pursh fl. ii. p. 639. On the 

 lower part of the Canadian. 



413. Broussonetia TiNCTORtA, Kuntli syn. i. p. 370. 

 Sprcng. syst. iii. p. 901. Morns tinctoria, Jacq. Amer. 247. 

 Willd. sp. pi. iv. p. 371. Madura aurantiaca, Nutt. gen. 

 ii. p. 234. James in Long's Exped. ii. p. 158. In deep and 

 fertile soils along the Arkansa and Canadian. 



Obs. " This tree rises to the height of twenty-five or thirty 

 feet, dividing near the ground into a number of long, slender, 

 and flexuous branches. The wood is of a yellowish colour, 

 uncommonly fine and elastic, affording the material most used 

 for bows by ail the savages from the Mississippi to the Rocky 

 Mountains. The bark, fruit, &ic. when wounded, discharge 

 a copious milky sap which soon dries in the air, and is after- 

 wards insoluble in water ; containing probably a large quan- 

 tity of caoutchouc. The leaves are oval and entire, five or 

 six inches long, and from two to three inches broad; smooth 

 and shining on the upper surface. The fruit, in size and ex- 

 ternal appearance, resembles the largest oranges. It consists 

 of radiating and woody fibres, terminating in a tuberculated 

 and slightly papillose surface. In this fibrous mass, the seeds, 

 which are nearly as large as those of a quince, are dissemi- 

 nated." James, 1. c. 



