102 NORTH AMERICAN FLORA LVolume 25 



by abortion, 1- or 2-seeded. Seed flattish, oval or oblong, the coriaceous coat produced 

 below into a membranaceous wing ; embryo straight, surrounded by a thin layer of endosperm . 

 Type species, Canotia holacantha Torr. 



1. Canotia holacantha Torr. Pacif. R. R. Rep. 4 : 68. 1857. 



Usually a shrub about 3 meters high, but sometimes a tree up to 10 meters high ; sepals 

 about 1 mm. long; petals and stamens about 5 mm. long; capsules, including the beak, 

 about 2.5 cm. long, 1 cm. thick. 



Type locality: Hills bordering Bill Williams Fork, Arizona. 



Distribution : Southern Arizona and adjacent California. 



Illustrations: Rothr. Bot. Wheeler's Surv. pi. 1 ; Sargent, Silva N. Am. pi. 37 ; Sargent, 

 Man. /. 50S ; Britton, N. Am. Trees /. 5S6 ; E. & P. Nat. Pfl. Nachtr. /. 128a. 



