APPENDIX G. BOTANY. 265 



0. Hirsutus, Sweet; Hook. Fl. Bor.-Amer. 2, p. 124; Choisy, 1. c. 

 Allionia hirsuta, Pursh, Fl. 2, p. *728. With the preceding. U. Stem 

 erect, 2-3 feet high, sparingly branched ; viscously pubescent ; leaves 

 2-3 inches long, and 1-1J inch wide, on very short petioles, nearly 

 entire. Flowers in a long, loose terminal and naked panicle ; involucre 

 3-flowered, rotate-companulate. Fruit fusiform, oblong, 5-angled. As 

 in most of the Nyctaginacece, this plant abounds in cells filled with 

 raphides. These are so abundant in the liber of the root, that they 

 form a layer of a silvery white color. 



Abronia mellifera, Dougl., in Hook. Bot. Mag., t. 28*79 ; Choisy, 

 1. c. Cache Creek; fl. and fr. May 18. The specimens in the collection 

 agree exactly with Douglas's plant collected in California, and named 

 by Sir William Hooker. 



CUPULIFER^E. 



Quercus undulata, Torr., in Ann. Lye, 2, p. 248, t. 4. Abundant 

 on the upper tributaries of the Red River. Stems 1-2 feet long, from 

 a thick woody base, sparingly branched above. Leaves oblong, two 

 inches or more in length, undulate, and furnished with 1-3 rather 

 obtuse and scarcely mucronate teeth on each side, densely and softly 

 pubescent underneath, nearly smooth above, thick and somewhat coria- 

 ceous. 



CONIFERS. 



Juniperus Virginiana, Linn.; Michx. f. Sylv. 2, p. 353, t. 155; 

 Torr., Fl. N. York, 2, p. 235. J. sabina, Hook., Fl. Bor.-Am. 2, p. 

 166. Middle Fork of Red River. 



H1P0XIDACEJE. 



Htpoxis erecta, Linn. ; Bart., Fl. N. Amer., 1, t. 35, f. 1 ; Torr., Fl. 

 N. York, 2, p. 289. Headwaters of the Trinity River; May. 



COMMELYNACE^E. 



Commelyna angustifolia, Linn. ; Kunth, Enum. 4, p. 53 ; Torr., Fl. 

 N. York, 2, p. 332. North Fork of Red River ; May^Tune. 



Tradescantia Virginica, Linn.; Bot. Mag., t. 105 ; Bart. 1. c, t. 41 ; 

 Kunth, Enum. 4, p. 81 ; Torr., Fl. N. York, 2, p. 333. Abundant on 



