AND OTHER FORAGE PLANTS. 91 



This grass is valuable on the soil mentioned above and is per- 

 ennial. 



3. P. FILIFORME, Slender Crab Grass. 



This plant grows well on dry sandy soil, is about two feet 

 high, very slender, has little foliage and is consequently of no 

 great agricultural value although very common. Still Mr. Col- 

 lier's analysis is appended : 



Oil, 1.29 Amylaceous cellulose, 29.96 



Wax, .25 Alkali extract, 23.19 



Sugars, 5.89 Albuminoids, 3.32 



Gum ahd dextrin, 4.67 Ash, 4.65 

 Cellulose, 26.78 . 



100.00 

 ASH. 



Potassium, 13.41 Phosphoric acid, 6.37 



Potassium oxide, 12.98 Silicic acid, 40.36 



Calcium oxide, 4.69 Chlorine, 12.17 



Magnesium oxide, 5.18 



Sulphuric acid, 4.84 100.00 



4. P. ANCEPS, Double-headed, Variable Panic Grass. 



This perennial is very common on tenacious, damp, sterile 

 soils, the flat stems rising from one to four feet high ; the radi- 

 cal leaves abundant, soon tough, eaten by cattle and horses, but 

 not when they can get better, tenderer forage. It forms strong- 

 ly rooted, spreading clumps, often completely carpeting the 

 ground with very pretty, glossy, light green, assurgent foliage. 



5. P. AMARUM, Bitter Panic Grass. 



This perennial is very common on sandy lands, and especially 

 about streams. It is too bitter and otherwise unpleasant to be 

 relished by cattle and is eaten by them only when they can do 

 no better. 



6. P. CAPILLARE, Hair-stalked panic, or Old Witch Grass. 

 This annual grows preferably on sandy lands, but is found in 



old fields and poor cultivated lands all over the United States. 

 The culms rise one or two feet high, bearing a few scattered 

 seed on capillary wide spreading branches. The stems are frag- 

 ile when dry, and the panicles are often seen floating high up 

 in the air, landing in trees, houses, streams, ponds etc. Often 

 the wind breaking them off where a field is covered with them, 

 rolls them along and piles up against fences and hedges to a 

 height of several feet ; and sometimes they fill up gullies and 

 cuts in roads. But the branches although so slender are rigid 

 and rough, so that they pack so loosely that one might pass 

 through a pile of them at night almost without being aware of 



