p. 8

497
den region, through which, in reference to the lights of science,
and the labors of civilization, it may truly be said:

He bent his way where twilight reigns sublime
O'er forests silent since the birth of time!" *

The "Sylva Americana" of his son remains to this day the
only standard work on the Forest Trees of the United States.

*Dr. C. W. Short on the Progress of Western Botany, p. 7.

List of the Natural Orders of Illinois Plants, with the number of indigenous
and introduced species; and the whole number of species native
of the northern United States, (including Kentucky and Virginia) from
Dr. A. Gray's Manual, 2d Edition.

Orders Illinois Plants Indigenous in Northern U.S.
Indigenous Introduced Total
Ranunculaceae 30 . . . . . 30 49
Magnoliaceae 2 . . . . . 2 6
Anonaceae 1 . . . . . 1 1
Menispermaceae 2 . . . . . 2 3
Berberidaceae 2 . . . . . 2 5
Nelumbiaceae 1 . . . . . 1 1
Cabombaceae 1 . . . . . 1 1
Nymphaceae 2 . . . . . 2 2
Papaveraceae 2 . . . . . 2 2
Fumariaceae 2 1 3 6
Cruciferae 18 4 22 46
Caparidaceae 1 1 2 1
Violaceae 7 1 8 18
Cistaceae, ............ 3 ........... 3 7
Parnassiaceae, ....... 2 ........... 2 3
Hypericaceae,........ 9 ........... 9 18
Caryophyllaceae, .....10 2 12 30
Portulaccaceae,........ 1 1 2 4
Malvaceae, ............. 4 3 7 9
Tiliaceae, ............... 1 ........... 1 2
Linaceae, ............... 2 ........... 2 2
Oxalidaceae, ............2 ........... 2 3
Geraniaceae,............ 2 ........... 2 3
Balsaminaceae, ........ 2 ........... 2 2
Rutaceae, ................. 2 2 3
Anacardiaceae,.......... 5 ........... 5 6
Vitaceae,.................... 4 ........... 4 7
Rhamnaceae,............. 2 ........... 2 6
Celastraceae,...............4 ........... 4 4
Sapindaceae,..............8 ........... 8 10
Polygalaceae,...........6 ............. 6 13
Leguminoseae,........ 49 3 52 91
Rosaceae,............ 32 ........... 32 71
Melastomaceae,...... 1 ........... 1 3
Lythraceae,............ 5 ........... 5 7
Onagraceae,........... 13 ........... 13 36