2Sl] FLORA OF BOULDER, COLORADO IO3 



Family 33. ULMACEAE Mirbel. Elm family. 



120. ULMTJS L. Elm. 



318. IT. Americana L. American elm. 



A tree of considerable size occurs in a wild place near the 

 entrance to Boulder Canon, doubtless self-sown from trees 

 planted for shade, 5500 ft. (Daniels). 



Newfoundland to Manitoba; Florida to Texas. 



121. CELTIS L. Hackberry. 



319. C. reticulata Torr. Veiny-leaved hackberry. 

 Rocky ridges on the mesas and foothills, scarce, 5700- 



6500 ft. (Daniels, 796). 

 Texas to Colorado and Arizona. 



Order 18. SANTALALES. 

 Family 34. LORANTHACEAE D. Don. Mistletoe family. 



122. KAZOUMOFSKYA Hoffm. Small mistletoe. 



320. E. Americana (Nutt.) Kuntze [Arceuthobium Ameri- 

 caniim Nutt.]. American small mistletoe. 



On Pinus contorta Murrayana (Oreg. Com.) Engelm. at 

 Sunset, 7700 ft. (Rydberg). 



British Columbia to Colorado and Oregon. 



321. R. cryptopoda (Engelm.) Coville [Arceuthobium cryp- 

 topoduni Engelm ; A. robustum Engelm] . Hidden-footed 



SMALL mistletoe. 



On Phms scopulorum (Engelm.) Lemmon upon high ridge 

 well toward eastern summit of Green Mt., 7500-8000 ft. 

 (Daniels, 770). Also between Sunshine and Ward (Rydberg). 



Texas and Colorado to Arizona and Mexico. 



Family 35. SANTALACEAE R. Br. Sandalwood family. 



123. COMANDRA Nutt. Bastard toad-flax. 



322. C. pallida A. DC. Pale bastard toad-flax. 

 Frequent on the plains, mesas, and foothills, 5100-8000 



ft. (Daniels, 49). St. Vrain Cafion (Coulter in Wabash Col- 

 lege Flerb.). 



Manitoba to British Columbia; Texas to California. 



