NATIVE WOODY PLANTS OF THE UNITED STATES 
209 
Psorodendron arborescens, see Parosela arhorescens. 
Fsorotlendron caiifornicum, see Parosela fremontii. 
Psorodendron fremontii, see Parosela fremontii. 
Psorodendron johnsonii, see Parosela fremontii. 
Psorodendron puberuliim, see Parosela schottii. 
Psorodendron schottii, see Parosela scJiottii. 
Psorodendron spinosum, see Parosela spinosa. 
Psorothamnus emoryi, see Parosela emoryi. 
Psorothamnus pclyadenia, see Parosela polyadenia. 
Psorothamnus scoparius, see Parosela scoparia. 
Psorothamnus siibnndus, 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. trifoUata complex, 
it is offered here as one species. None is eaten by livestock. 
Ptelea angnstifolia, see Ptelea haldtoinii. 
Ptelea baldwinii Torr. and Gray. California hoptree. 
P. laldwinii 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 haldivinii. 
Ptelea microcarpa, see Ptelea trifoUata. 
Ptelea parvifolia, see HeUetta parvifolia. 
Ptelea rhombifolia, see Ptelea trifoUata. 
Ptelea serrata, see Ptelea trifoUata. 
Ptelea tomentosa, see Ptelea trifoUata. 
Ptelea trifoliata L. Hoptree. 
P. microcarpa Small, P. tomentosa Raf., P. serrata Small, P. rhomMfolia 
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; flov*^ers 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. 
PursMa glandnlosa Ciirran. Antelope brnsh. 
Kunzia glandulosa Greene, P. tridentata glandulosa J'ones. 
Range: 10. 
Site: Dry, sun. 
Fruit : Achene, available August-September. 
A small to large evergreen shrub ; flowers April-July. 
Odservatiorts: 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. 
