INDEX TO \'OLU.ME TWENTY 



(The names of species and varieties described as new and of new combina- 

 tions are in bold face type. Names of members of the Club, listed on pages 

 3 to 9, are not indexed.) 



Acalypha virginica, 99 



Acar, 91 ; Drummondii, 71 ; Xegundo, 



23, 71; pennsylvanicum, 119; ru- 



brum, 119; saccharinum, 119; sac- 



charum, 119 

 Achillea Millefolium, 100 

 Achlys triphylla, 21 

 Actinomeris squarrosa, 117 

 Aegopogon, 86 

 Aeschynomene virginica, 22 

 Agati, 131 



Agropyron junceum, 40 

 Agrostis alba. 87 ; alba vulgaris, 87 ; 



capillaris, 87 ; palustris, 87 

 Ailanthus, 55 

 Aira, 86; caryophyllea, 86, 98; prae- 



cox, 86 

 Allard, H. A., work of, 46 

 Allenrolfea utahensis, 20 

 Allium attenuifolium, 40 

 AInus rugosa, 119 

 Althea rosea, 43 

 Amaranthus retroflexus, 99 

 Ambrosia artemisiaefolia, 100; psilo- 



stachya, 44; trifida. 71 

 Ammophila arenaria, 40 

 Amorpha, 130 



Ampelopsis arborea. 71 ; cordata. 22, 

 Amygdalus persica. 99 

 Anaphalis margaritacea, 25, 100 

 Andrews, E. F., Habits and haunts of 



the North American Resurrection 



Fern, 91 

 Andropogon, 75 

 Apera, 87 



Apocynum androsaemifolium, iiS 

 Arabis alpina, 42 

 Arachis hypogaea, 22 

 Aragallus, 132 

 Aralia spinosa, 75 

 Arctium minus. 100 

 Arctostaphylos patula, 43 ; Uva-Ursi, 



24 

 Argynnis cybele, 118; diana, 118 

 Arisaema triphyllum, 118 

 Arnold, W. T.. 89 

 Arracacia xanthorrhiza, 16 



Artemisia annua. 44 ; ludoviciana, 



44 ; vulgaris. 44 

 Asarum, 20 



Asclepias syriaca, 43 ; tuberosa, ^4 

 Aspidium, 80 ; spinulosum, 82 

 Aspris, 86 ; capillaris, 40 

 Aster cordifolius, 97, 100 

 Astragalus, 131, 132 

 Atelephragma. 132 

 Atriplex hastata 99 ; patula hastata, 



41 

 Avena sativa, 98 

 Azalea nudiflora, 119 

 Azolla caroliniana, 40 



Baccharis halimifolia, 25, 73 

 Bacteria in industry, The uses of 



fungi and, 61 

 Bacterium Juglandis, 15 

 Bahama Flora, Britton and Mills- 



paugh (Review), 124 

 Banning. M. E., 60 

 Baptisia, -jz ; leucophaea, 73 ; tinc- 



toria, 118 

 Barbiera, 131 

 Barnhart, J. H., 9, 10, 12, 14, 59, 



62—64 ; Wooden flowers, 14 

 Benthamantha, 131, 132 

 Berry, E. W., New specific name, loi 

 Betula alleghanensis, 118; populifo- 



lia, 98, 99 

 Bidens bipinnata. 100; frondosa, 100 

 Bjerkendera adusta, 14 

 Boletus bicolor. 15 

 Bradshaw, R. V.,. A new Oregon Eu- 



cephalus, 122 

 Brassica incana. 41; nigra, 99; ole- 



racea, 99: Schreberi, 21 

 Bruan, H., Emile Duclaux's Pasteur: 



the history of a mind (Review), 



127 

 Britton, E. G., 13, 63. 65 ; Disappear- 

 ing wild flowers, 10 1 

 Britton, N. L., 12, 13, 63, 64; Recent 



explorations in southern Florida, 



64; Two new West Indian plants, 



83 



133 



