248 Plants collected during a journey 



41S. Q. undulata, fruticosa, ramosissima; foliis brevipe- 

 tiolatis, oblongis, obtusiusculis, coriaceis, repando-dentatis, 

 undulatis, basi sequalibus, subtus pulverulento-tomentosis, su- 

 pra nitidis: fructibus solitariis vel geminis, sessilibus, de- 

 presso-bemispbericis ; squamis appressis. 



Tab. IV. 



Desc. A small straggling shrub ; smaller branches, and under surface 

 of the leaves covered with a dense yellowish-brown tomentum. Leaves 

 rather crowded, an inch and a half or two inches long, obtuse and equal at 

 the base; margin much undulated and repandly dentate ; teeth very short 

 and mucronate ; under surface reliculately veined ; upper shining, but very 

 minutely pubescent ; petioles about three lines long. Fruit rather large, 

 closely sessile, solitary, or in pairs ; cup depressed hemispherical ; nut ob- 

 long-ovate, mucronate. 



Hab. Sources of the Canadian, and the Rocky Mountains. 



Obs. Allied to Q. ilicifolia, and apparently also to Q. re- 

 panda of Humboldt and Bonpland. 



f f Betulincs. 



419. Castanea pumila, Willd. Michx. arb. ii. p. 166. 

 t. 7. On the Canadian. 



420. Ostrya virginica, L. Michx. 1. c. iii. t. 7. Near 

 the Rocky Mountains.. 



421. Platanus occidentalis, L. Michx. 1. c. t. 3. On 

 the Missouri and Canadian. 



f f f Juglandece. 



422. Juglans nigra, L. Willd. sp. pi. iv. p. 456. On 

 the Canadian. 



f f "f f Salicince. 



423. Salix longifolia, Muhl? S. angustata, Pursh, 

 fl. ii. p. 613? S. foliis angusto-linearibus, utrinque attenu- 

 ates, glabris, concoloribus, remote denticulatis; stipulis ex- 

 iguis; amentis serotinis, linearibus, erectis ; fertilibus tomen- 



