298 riparia Engelm. 



299 saccharata Engelm. 



300 Tuckermani A. Br. 



CYCADACEAE 



Zaiiiia 7 



301 integrifolia Jacq. 



302 pumila L. 



TAXACEAE 



Tumion 1 7 



( Torreyd] 



303 Californicum (Torr.) Greene 



304 taxifolium (Arn.) Greene 



Taxvis 18 



305 brevifolia Nntt. 



306 Floridana Nntt. 



307 minor (Michx.) Britton 

 (T. Canadensis Willd.) 



PINACEAE 



Pinus 22 



308 albicanlis Rngelm. 



309 Apaclieca Lemmon 



310 aristata Engelm. 



311 Arizonica Engelm. 



312 attennata Lemmon 

 (P. tuberculata Gord.) 



313 Balfonriana Murray 



314 cembroides Zncc. 



315 Chihnahuana Engelm. 



316 clansa (Engelm.) Sarg. 



317 contorta Dongl. 



318 Coulteri Lamb. 



319 divaricata (Ait.) Dn Mont. 

 (P. Banksiana Lamb.) 



320 echinata Mill. 

 (P. mitis Michx.) 



321 edulis Engelm. 



322 flexilis James 



323 megalocarpa Sndw. 



324 glabra Walt. 



325 heterophylla (Ell.) Sndw. 

 (P. Cubensis Griseb.) 



326 Jeffreyi Oreg. Com. 



327 Lambertiana Dongl. 



328 Mayriana Sndw. 



329 monophylla Torr. & Frem. 



330 monticola Dongl. 



331 mnricata Don. 



332 Mnrrayana Oreg. Com. 



333 palnstris Mill. 



334 ponderosa Dongl. 



335 pnngens Michx. f. 



336 qnadrifolia Parl. 



{P. Parry ana Engelm.) 



337 radiata Don 



338 resinosa Ait. 



339 rigida Mill. 



340 Sabiniana Doi-gl. 



341 scopnlornm (Engelm.) Lemmon 



342 serotina Michx. 



343 strobiformis Engelm. 



344 Strobus L. 



345 Taeda L. 



346 tennis Lemmon 



347 Torreyana Parry 



348 Virginiana Mill. 

 (P. inops Soland.) 



Larix 24 



349 laracina (Dn Roi) Koch 



(L. Americana Michx.) 



350 Lyallii Parl. 



351 occidentalis Nntt. 



Picea 26 



352 brevifolia Peck 



353 semiprostrata Peck 



354 Breweriana Wats. 



355 Columbiana Lemmon 



356 Canadensis (L.) B. S. P. 



(P. alba Link.) 



357 Engelmanni (Parry) Engelm. 



358 Mariana (Mill.) B. S. P. 



(P. nigra Link) 



359 Parryana (Andre) Parry 



(P. pungens Engelm.) 



360 rubens Sargent 



(R rubra (Poir.) Dietr.) 



361 Sitchensis (Bong.) T. & M. 



Tsuga 27 



362 Canadensis (L.) Carr. 



363 Caroliniana Engelm. 



