Pomona College Journal of Economic Botany 



313 



Malvastrum fasciculatum — Tall shrub, or somewhat arborescent, 2.4 m. high, 

 Common in the lower portions of the chaparral belt. 



Mimulus brevipes — 3-6 dm. high, corolla yellow. Flowering on our dry foothills 

 from March to June. 



Mirabilis calif ornica (Four-o'clock) — 3-6 dm. long. March- June. 



Penstemon spectabilis — 6-12 dm. high. Frequent on the dry hill sides. May-July. 



Pinus torreyana (Del Mar or Torrey Pine) — Small tree, 6-10 m. high. 



Pinus coulteri (Coulter's Pine) — Middle sized trees. 



Pinus monophylla (Nut Pine) — -Small tree, ,'5-8 m. high, with irregularly spread- 

 ing branches and pale flaky bark. Frequent on the dry desert slopes of the 

 San Gabriel and San Bernardino mountains. 



Pinus attenuataSm&W tree less than 10 m. high. Found on the southern slope 

 of the San Bernardino mountains at 2.500-4000 feet elevation. 



Prunus demissa — Shrub, 1-4 m. high. Found in the chaparral and pine belt. 



Cerasus ilicifolia (Evergreen Cherry) — Sometimes called Prunus ilicifolia. 

 Shrubby or arborescent, 3-6 m. high. Flowering from May to June. 



Prosopis juliflora (Mesquit)— Shrub or small tree, common on the Colorado 

 Desert and along the river bottoms near San Bernardino. 



Prosopis pubescens (Tornilla or Screw Bean) — Shrub or small tree. River bot- 

 toms about San Bernardino, with the last. 



Quercus engelmanni— Middle sized tree. Altadena to Monrovia. 



Quercus agrifolia (Common Life Oak) — Medium sized tree of spreading habit. 



Quercus dumosa (Scrub Oak) — Shrub or small tree. Common in all the chaparral 

 belt. 



Quercus rvislizeni — Spreading shrub or small tree. Common in the chaparral 

 belt of all our mountains except the Santa Monica range. 



Ramona nivea — Shrubby, below 9-12 dm. high. Occasional in the foothills of 

 the Santa Monica and San Bernardino mountains. April-May. 



Ramona stachyoides (Black Sage) — Common on the low hills throughout our 

 range. April-June. 



Ramona polystachya (White Sage) — Shrubby, below 1 m. high. Very common 

 on the dry plains towards the foothills, and ascending these to about 3000 

 feet. April-July. 



Rhamnus crocea — Low, much branched; flowers reddish. Occasional on the dry 

 plains and in the chaparral belt of our interior regions. 



Rhamnus crocea ilicifolia — Shrub, sometimes arborescent, foliage closely resem- 

 bling Cerasus ilicifolia. Common throughout the chaparral belt. 



