GENEEAL REPORT. xliii 
orders, 134 genera and 305 species. By far the largest order is tlie Com- 
posite^ to which belong 28 per cent, of the genera and one-fifth of the 
species, somewhat more than half, both of genera and species, being senecioid 
and one-fourth ligulate. The CrudfercE, Graminea^ and Scrophulariacem 
follow in the number of their genera, making more than half of the \\ h()le, 
but the numerous Astragali and EriogonecB place the LegwninoscB and 
Pohjgonacem in advance in respect of species, which orders with the Cruci- 
ferce and ScrophulariacecB form one-half The PolemoniacecB^ HydrophyJfdccce, 
Onagracece, ChenopodiacecB and BorraginacecB are also large orders with iVoiu 
three to six per cent, of species. This group is decidedly western and 
southern, less than five per cent, appearing on the Atlantic slope, while 55 
per cent, are on the Pacific side and nearly one-third extend to Arizona 
or beyond. 
In the mountain flora of the Basin there arc 51 orders, 191 genera and 
393 species. The composites, though less predominent than in the last group, 
have yet more than 18 per cent, of the species and over 17 per cent, of the 
genera, half of which genera and nearly half the species are senecioid, 27 per 
cent, of the genera and 35 per cent, of the species being asteroid. The 
proportion of the other orders has changed largely, the relative increase 
being greatest in the Pcosacece^ GaryophyllacecE, and SaxifragacecB, and some- 
what less in the LiliacecE, EricacetE, Coniferce, and UjnhelliferfE, with but little 
increase or even a diminution of numbers in the other more prominent orders. 
Seven orders have now to be joined with the CompositcE to form half of the 
genera and species, viz : Leguminosa, Cruciferce, Rosaceoi^ GraminetB^ Scrophu- 
lariacecB, PolemoniacecE and RanuncuIacecE—ihe last equaled in species by the 
Cartjophyllacece, Sagcifragacece and Polygonacece. 
The tendency of the range is, as wms io cxprclcd, toward the north 
and northwest. The number of Pacific species is nearly 70 per cent., to 22 
per cent, upon tlic Atlantic side; only 9 per cent, are known as southern, 
but nearly 30 per cent, are arctic or subarctic, and as large a proportion alpine 
or subalpine. 
If the species found in the AVahsatch and Uintas be included the 
results are somewhat changed ; the proportion of Composites is reduced to 
one-sixth of the species and one-seventh of the genera, and the Leguminosce 
are followed in nund)er of species by the CyperacecE, Ptosacece, Graininece, 
CaryophyllaceoB, Ranunailacece and Scrophulariacece. The proportion of 
