50 



BULLETIN 1405, TJ. S. DEPARTMENT OF AGRICULTURE 



Table 20. — Vegetative record of grazed plot No. 15 on Philadelphia Flat, 1921 



Species recorded : 



American vetch (Vicia americana). 

 Androsace (Androsace puberulenta). 

 Aster (Aster frondeus) . 

 Beardtongue (Pentstemon rydbergii) . 

 Buttercup (Ranunculus inamoenus). 

 Chickweed (Alsine jamesiana). 

 Dandelion (Leontodon taraxacum) . 

 Draba (Draba crassifolia) . 

 Knotweed (Polygonum aviculare) . 

 Lamb's-quarters {Chenopodium album). 

 Letterman needle grass (Stipa letter- 

 man i) . 

 Ligusticum (Ligusticum ftlicinum) . 

 Meadow rue (Thalictrum fendleri) . 



Species recorded — Continued. 



Mountain dandelion (Agoseris pumila). 

 Pacbylopbus (Pachylophus caespitosus] 

 Peppergrass (Lepidium ramosissimum). 

 Plantain (Plantago ticeedyi). 

 Potentilla (Potentilla filipes). 

 Tansy mustard (Sophia incisa) . 

 Tongue-leaf violet (Viola linguaefolia). 

 Trout lily (Erythronium parviflorum) . 

 Violet wheat grass (Agropyron viola- 



cemn ) . 

 Wild geranium (Geranium viscosissi- 



mum). 

 Yarrow (Achillea lanulosa). 



SUMMARY OF PLANT COYER RECORD AND ITS FORAGE VALUE 



Number of species 24 



Density . 287 



Palatability percentage : 



Cattle 50. 61 



Sheep 76. 53 



Forage factor : 



Cattle . 145 



Sheep . 220 



Table 21. — Vegetative record of protected plot No. 3 on Seeley Creek 1915 



and 1921 (PI. VI) 



Species recorded, 1915 : 



Bedstraw (Galium boreale). 



Douglas knotweed (Polygonum, 

 lasii). 



Sweet sagebrush (Artemisia sp.). 



Tansy mustard (Sophia incisa). 



Yarrow (Achillea lanulosa). 

 Species recorded. 1921 : 



Androsace (Androsace pubei~ulenta) . 



American vetch (Vicia americana). 



Bladder pod (Lesquerella kingii). 



Buttercup (Ranunculus inamoenus). 



Chickweed (Alsine jamesiana). 



Collomia (Collomia linearis). 



Dandelion (Leontodon taraxacum). 



Draba (Draba crassifolia). 



Douglas knotweed (Polygonum doug- 

 lasii). 



Lamb's-quarters (Chenopodium album). 



Species recorded, 1921 — Continued. 



Ligusticum (Ligusticum filicinum). 

 Low larkspur (Delphinium menziesii) . 

 Mountain dandelion (Agoseris pumila). 

 Nodding blue grass (Poa reflexa). 

 Pachylophus (Pachylophus caespitosus). 

 Peppergrass (Lepidium ramosissimum). 

 Plantain (Plantago ticeedyi). 

 Potentilla (Potentilla nuttallii). 

 Spiked trisetum (Trisetum spicatum). 

 Sweet sagebrush (Artemisia sp.). 

 Tansy mustard (SopMa incisa). 

 Tongue-leaf violet (Viola linguaefolia). 

 Trout lily (Erythronium parviflorum) . 

 Violet wheat grass (Agropyron viola- 



ceum). 

 Wild geranium (Geranium viscosissi- 



mum). 

 Yarrow (Achillea lanulosa). 



SUMMARY OF CHANGES IN VEGETATION AND IN FORAGE VALUE OF COVER 





1915 



1921 



Per cent 

 increase 



or 



decrease 



(— ) from 



1915 to 



1921 



Number of species . .. . . . _____ . 



5 

 .133 



31.67 

 66.86 



.042 

 .089 



26 

 .286 



25.83 

 60.36 



.074 

 .173 



420 



Density 



Palatability percentage: 



Cattle 



115 



-18.4 



Sheep ______ _ ________ 



-9.7 



Forage factor: 



Cattle 



76.2 



Sheep 



94.4 







SUMMARY 



To maintain the forage productivity of the range it is necessary 

 to be able to determine (1) when the range is ready for grazing, 



(2) the intensity and frequency of grazing that may be allowed, 



(3) how to handle the stock, and (4) the natural revegetation of 

 the range that may be relied on. Observations at the Great Basin 



