▁Columbia ▁University ▁▁ 1 9 3 2 : ▁Flora ▁of ▁the ▁Pra i ries ▁and ▁Pla ins ▁of ▁Central ▁North ▁America ▁with ▁M . ▁A . ▁How e ▁ ▁Other ▁works ▁ 1 9 0 1 : ▁Cont ribution s ▁to ▁the ▁bot any ▁of ▁the ▁Y uk on ▁Territ ory , ▁( with ▁Nathan iel ▁Lord ▁Brit ton , ▁Marshall ▁A . ▁How e , ▁Luci en ▁Marcus ▁Under wood , ▁and ▁R . ▁S . ▁Williams ) ▁ 1 9 0 3 : ▁Flora ▁of ▁the ▁sout he astern ▁United ▁States ; be ing ▁descri ptions ▁of ▁the ▁seed - pl ants , ▁f ern s ▁and ▁f ern - al lies ▁growing ▁naturally ▁in ▁North ▁Carolina , ▁South ▁Carolina , ▁Georgia , ▁Florida , ▁Tennessee , ▁Alabama , ▁Mississippi , ▁Ark ansas , ▁Louisiana ▁and ▁the ▁Indian ▁territory ▁and ▁in ▁Oklahoma ▁and ▁Texas ▁east ▁of ▁the ▁one - h undred th ▁mer id ian ,( with ▁John ▁K unk el ▁Small ) ▁ 1 9 1 9 : ▁Key ▁to ▁the ▁Rock y ▁Mountain ▁fl ora ; ▁Colorado , ▁Ut ah , ▁Wy oming , ▁Id aho , ▁Mont ana , ▁S ask atch ew an , ▁Al berta , ▁and ▁parts ▁of ▁Neb r aska , ▁South ▁Dak ota , ▁North ▁Dak ota , ▁and ▁British ▁Columbia . ▁ 1 8 9 9 - 1 9 1 3 : ▁Studies ▁on ▁Rock y ▁Mountain ▁fl ora . ▁ ▁( Series : ▁Cont ribution s ▁from ▁the ▁New ▁York ▁Botan