INDEX. 



The numerals of the first column indicate each order and genus in 

 the Conspectus, preceding this Index ; those of the second one the%%of 

 the Key. In the first colurhn 23. 6 means Order XXIII., genus 6. 



Abies, Spruce, Fir, , 



Abutilon, Velvet-leaf, . 



Acalypha, three-seeded Mercury, 



Acer, Maple, 



Acerates, Green Milkweed, 



Achillea, Milfoil, Yarrow, 



Acnida, Water-Hemp, 



Aconitum, Aconite, Monk's-hood, 



Acorus, Sweet Flag, Calamus, . 



Actasa, Baneberry, Cohosh, 



Actinomeris, .... 



Adam and Eve, Aplectrum, . 



Adam^s Needle, sp. of Yucca, . 



Adder's Mouth, Microstylis, . 



Adder's Tongue, sp. of Erythronium 



Adenocaulon, .... 



Adlumia, Climbing Fumitory, . 



^schyomene, Sensitive Joint Vetch, 



^sculus. Buckeye, 



.^thusa, Fool's Parsley, 



Agrimonia, Agrimony, 



Agave, False Aloe, 



Agrostemma, Corn-Cockle, 



Agrostis, Bent-Grass, . 



Aira, Hair-Grass, . 



Airopsis, 



Alchemilla, Lady's Mantle, 



Alder, Alnus, 



Alder-Buckthorn, Subgenus of Bhamnus, 



