546 
J. C. ARTHUR 
Baccharis serraefolia 195 
thesioides 193 
Bauhinia inermis 81 
Benthamantha cinerea 45 
Berberidaceae 46 
Betulaceae 17 
Bidens heterophylla 100 
Holwayi 100 
leucantha 100 
pilosa 100 
squarrosa 100 
tereticaulis 100 
Bignoniaceae 53, 54, 171 
Blechum Brownei 172 
Bomaria acutifolia 122 
Bouteloua filiformis 115 
Bouvardia leiantha 93 
Brachypodium mexicanum 118 
Brickellia adenocarpa 63 
adenocarpa glandulipes 63 
Cavanillesii 63 
Brongniartia sp. 39 
Buettneria lateralis 43, 138 
Byrsonima crassifolia 229 
Cacalia calotricha 218 
Caesalpinia exostemma 37 
Caesalpiniaceae 36, 37, 38 
Galea insignis 199 
integrifolia 199 
zacatechichi 198 
zacatechichi macrophylla 198 
Calliandra gracilis 31 
Houstoni 30 
Canna sp. 123 
Cannaceae 123 
Capriola dactylon 1 1 1 
Caprifoliaceae 3 
Cardiospermum coluteoides 132 
grandifolium 132 
Carduaceae 4, 5, 6, 7, 8, 21, 60, 62, 65, 66, 
95, 96, 97, 98, 99, 100, loi, 178, 179, 
180, 181, 182, 183, 184, 185, 186, 
187, 188, 189, 190, 191, 192, 193, 
194, 195, 196, 197, 198, 199, 200, 
201, 202, 203, 204, 205, 206, 207, 
208, 209, 210, 211, 212, 213, 214, 
215, 216, 217, 218, 226 
Carex cladostachya 121 
polystachya 121 
Caryophyllaceae 126, 127 
Castilleja communis 170 
tenuiflora 20, 170 
Cassia biflora 36 
Cayaponia racemosa scaberrima 
Cenchrus echinatus 112 
viridis 112 
Cestrum aurantiacum 90 
lanatum 91 
nocturnum 91 
Chamaesyce adenoptera 85 
braziliensis 85 
cordata 131 
hirta 85 
lasiocarpa 85 
Cichoriaceae 177 
Cissus sicyoides 64 
Clibadium Donnell-Smithii 65 
Cologania glabrior 80 
Commelinaceae 71 
Convolvulaceae 2, 149, 150 
Conyza asperifolia 196 
Cordia alliodora 155 
Gerascanthus 155 
riparia 22 
Goreopsis mexicana 216 
Gornutia grandifolia 156 
Grotalaria maypurensis 47 
Grucea calocephala 175 
Gucurbitaceae 94 
Gunila leucantha 169 
polyantha 169 
Guphea Hookeriana 142 
Gynodon dactylon 1 1 1 
Gyperaceae 119, 120, 121 
Gyperus hermaphroditus 119 
Dalea domingensis 48 
Dichondra sericea 151 
Dichondraceae 151 
Dilleniaceae 139, 140 
Diphysa robinioides 49 
Dorstenia Gontrajerva 222 
Houstoni 222 
Ehretiaceae 22, 155 
Eleocharis geniculata 120 
