425 
When growing in very dry places, bulbs are frequently formed on the roots 
of Timothy grass, as a sort of store-house of moisture, &c., from which to 
draw supplies of nutriment for the future growth of the plant. 
Plate I, Fig. 3. —a , the flower fully expanded; b , the same closed (magni¬ 
fied). Plate XI, Fig. 3, is a cross-section of the culm of this species, showing 
the minute structure of endogenous plants. 
The following analysis of the ash of this important species of grass, is by 
Prof.'E. Emmons, and published in his Agriculture of the State of N. York; 
vol. 2, p. Vl. 
Silica. 41.650 
Phosphates. 16.925 
Carbonate of lime.*. 0.200 
Magnesia... 0.500 
Potash. 30.760 
Soda.■.C. 1.020 
Soluble silica. 0.200 
Chloride of sodium. 2.490 
Sulphuric acid. 4.130 
Organic matter and loss. 2.125 
100.000 
The proportion of water lost in drying is. 70.69 
In dry hay the proportion of nutritive matter is. 93.58 
In dry hay the proportion of ash is.!. *. . 6.42 
11. Phleum Alpinum. Linnaeus. 
Spike ovate-oblong; glumes strongly ciliate-fringed on the back, truncate, 
tipped with a rough or barbed awnlike bristle, about their own length. Pe_ 
rennial; culms one foot high. Native of the mountains of Europe. Abou 
Lake Superior.— Mr. W. D. Whitney. « 
TRIBE III. AGROSTIDEJ5. 
Infloresence panicled, or rarely spiked; spikelets solitary, one-flowered; 
glumes and paleae of nearly similar texture, usually carinate; scales two. 
GENUS 6. VILFA. Adanson. 
Spikelets in a contracted or spike-like panicle; glumes carinate, one- 
nerved, not awned or pointed, the lower smaller, flowers nearly sessile in 
the glumes; paleae two, much alike, naked, neither awned nor mucronate, 
■usually longer than the glumes; the upper palea bi-carinate stigmas sim~ 
i 
