NATIVE WOODY PLANTS OF THE UNITED STATES 209 



Psorodendron arborescens, see Parosela arborescens. 

 Psorodendron californicum, see Parosela fremontii. 

 Psorodendron fremontii, see Parosela fremontii. 

 Psorodendron johnsonii, see Parosela fremontii. 

 Psorodendron puberulum, see Parosela schottii. 

 Psorodendron schottii, see Parosela schottii. 

 Psorodendron spinosum, see Parosela spinosa. 

 Psorothamnus emoryi, see Parosela emoryi. 

 Psorothamnus polyadenia, see Parosela polyadenia. 

 Psorothamnus scoparius, see Parosela scoparia. 

 Psorothamnus subnudus, see Parosela polyadenia. 



Ptelea spp. 



The species of this genus are apparently not well understood at present. The 

 reduction of all to two species is without doubt open to question but since 

 authorities do not agree on what is to be done with the P. trifoliata complex, 

 it is offered here as one species. None is eaten by livestock. 



Ptelea angustifolia, see Ptelea baldioinii. 



Ptelea baldwinii Torr. and Gray. California hoptree. 



P. baldwinii crenulata Jeps., P. crenulata Greene, P. angustifolia Benth. 

 Range : 3, 5, 9, 17. 

 Site : Dry, well-drained, sun. 

 Fruit : Samara. 

 A large shrub to small tree ; flowers April-May ; about 7,000 seeds per pound. 



Ptelea crenulata, see Ptelea 

 Ptelea microcarpa, see Ptelea trifoliata. 

 Ptelea parvifolia, see Helietta, parvifolia. 

 Ptelea rhombifolia, see Ptelea trifoliata. 

 Ptelea serrata, see Ptelea trifoliata. 

 Ptelea tomentosa, see Ptelea trifoliata. 



Ptelea trifoliata L. Hoptree. 



P. microcarpa Small, P. tomentoSa Eaf., P. serrata Small, P. rhombifolia 

 Heller. 



Range : 11, 16, 17, 20, 22, 23, 24, 25, 27, 28, 29. 

 Site : Dry, well-drained, sun. 



Fruit : Samara ; available in September, persistent until spring. 

 A large shrub to small or very rarely a large tree ; flowers in June ; 18,350 

 seeds per pound. 



Ptilocalyx greggii Torr. 

 Coldenia greggii Gray. 

 Range : 11. 

 Site : Dry, sun. 

 Fruit: Nutlet. 

 A small, much-branched shrub. 



Purshia glandulosa Curran. Antelope brush. 



Kunzia glandulosa Greene, P. tridentata glandulosa Jbnes. 

 Range: 10. 

 Site : Dry, sun. 



Fruit : Achene, available August-September. 

 A small to large evergreen shrub ; flowers April-July. 

 Observations: Eagerly eaten by California mule deer. 



Purshia tridentata (Pursh) DC. Antelope brush. 



Kunzia tridentata Spreng. 



Range : 4, 6, 7, 8, 9, 11, 12, 13, 14, 16. 

 Site: Dry, well-drained, sun. 

 Fruit : Achene, available in August. 



