34 BULLETIN 201, U. S. DEPARTMENT OF AGRICULTURE. 



PANICULARIA PAUCIFLORA (Presl.) Kuntze. 



Panicularia pauciflora is a soft, water-loving species of smaller stature than P. grandis. 

 It also never becomes abundant, but commonly makes almost pure stands in the edges 

 of fresh-water ponds, streams, and marshes, especially in the high altitudes of the 

 Rocky Mountain regions. The areas are all small, however, being seldom over a few 

 rods in extent, and usually they are much smaller in area than this. What there is of it 

 is readily grazed by all classes of live stock. 



No. 8868 was collected at Summit, Mont., August 15, 1907. The sample was cut 

 close to the ground when the seed was in early maturity. Its percentage of moisture 

 was 6.34. Other constituents (on a water-free basis) were as follows: Ash, 10.01 ; ether 

 extract, 5.27; crude fiber, 25; nitrogen-free extract, 46.23; protein, 13.49; pentosans 

 20.37. 



PANICUM FASCICULATUM Swartz. 



The main economic interest in Panicum fasticulatum is derived from the fact that it 

 often produces a heavy aftermath of good quality in grain fields or in waste places in 

 our irrigated Southwest. 



No. 8568 was collected near Phoenix, Ariz., September 24, 1906. The sample rep- 

 resents the plant when the seeds are fully mature. Its percentage of moisture was 

 4.68. Other constituents (on a water-free basis) were as follows: Ash, 15.19; ether 

 extract, 2.01; crude fiber, 25.91; nitrogen-free extract, 46.99; protein, 9.90; pento- 



S£LT1S X9 44 



PANICUM FILIPES Scribn. 



Panicum filipes resembles more closely than anything else a somewhat dwarf-leaved 

 form of switch-grass (P. virgatum). It grows abundantly in dry situations in southern 

 Texas and forms a valuable part of the pasturage, growing in scattered bunches. It 

 can not be considered of much consequence in native hays, but its delicate panicle, 

 abundant leafage, and rather small culms render it of considerable importance as a 

 pasture grass. 



No. 8403 was collected Dear Green, Tex., August 14, 1906. The sample represents the 

 plant with the seed fully mature and half of the leaves dead and dry. It was harvested 

 about 2 inches high. Its percentage of moisture was 5.44. Other constituents (on a 

 water-free basis) were as follows: Ash, 9.66; ether extract, 1.89; crude fiber, 32.57; 

 nitrogen-free extract, 50; protein, 5.88; pentosans, 26.09. 



PANICUM HALLII Vasey. 



Panicum hallii (panic-grass) is of a great deal of importance as a filler on the open 

 mesas and rocky hills, as well as in poorly cultivated fields from Texas to Arizona. 

 It is a species of secondary quality. 



No. 7087 (E. O. W.) was collected on the mesas near Las Cruces, N. Mex., October 4, 

 1912. Its percentage of moisture was 3.42. Other constituents (on a water-free 

 basis) were as follows: Ash, 10.77; ether extract, 1.56; crude fiber, 31.93; nitrogen-free 

 extract, 50.29; protein, 5.45; pentosans, 25.05. 



PANICUM OBTUSUM H. B. K. 



Panicum obtusum is a common and familiar grass, sometimes known as vine mes- 

 quite, extending from Colorado to the Gulf of Mexico and westward through Arizona. 

 It usually inhabits waste places, alluvial bottoms, and other moist situations, com- 

 monly to the exclusion of everything else wherever it gains a good foothold . Its ability 

 to develop by long overground stems, which root at every joint, gives it a great advan- 

 tage in soils which are comparatively loose. It seldom is in condition to be cut for 

 hay, but in a few situations it has been seen making a growth which would yield, if 

 cut with the mower, fully 1 ton to the acre. Near Seligman, Ariz., during the autumn 

 of 1908 there were considerable areas of it, in one place 5 or 6 acres which would make 

 1 to 1J tons to the acre. This situation, however, was an exceptional one. A large 

 quantity of earth had been washed down from a dam which broke in the early summer, 

 depositing from 1 to 6 inches of loose earth over the entire area. It is in situations 

 where the soil is of this nature that the plant shows to best advantage. It makes but 



