IV CONTENTS. 



Two Californian Columbines 141 



Accessions to Antennaria 143 



The Genus Saviniona 159 



Accessions to Apocynum 164 



New Species of Trautvetteria 190 



Some Erigeron Segregates 193 



Certain Cruciferous Types 219 



New Species of Chaenactis 221 



Certain Asclepiads 229 



Some New Lupines 233 



New Species of Cicuta 236 



Early History of Our Dogbanes. — I 241 



Some Californian Maples 248 



Certain Western Roses 254 



Three New Rhamni 266 



A Handful of Vetches 267 



