158 Papaveraceae 



1. U. Californica (H. & A.) Nutt. Tree 4-15 m. high, grow- 

 ing parts and inflorescence somewhat puberulent; leaves shining, 

 <dark green, lanceolate-oblong, 5-10 cm. long; peduncles in 4 ter- 

 minal panicles or solitary in the upper axils, 6-10-flowered ; 

 sepals 3-5 mm. long, oblong-ovate; stamens included; drupes 

 solitary or 2-3 in a cluster, 2 cm. long, becoming dark purple 

 with thin pulp and stone. 



Throughout our range in canyons, or on mountain slopes where it is 

 often reduced to an arborescent shrub. January-April. Fruit in November. 



Family 34. PAPAVERACEAE. POPPY FAMILY. 



Herbs or rarely shrubs with white, yellow or color- 

 less sap and alternate exstipulate leaves or the upper 

 rarely opposite. Flowers solitary or in clusters, perfect, 

 regular or irregular. Sepals distinct or united into a 

 calyptra, caducous, 2, rarely 3 or 4. Petals 4-6 or rarely 

 none, imbricated, deciduous. Stamens numerous or few, 

 hypogynous, distinct, filaments filiform ; anthers open- 

 ing by a longitudinal slit. Ovary 1, many-ovuled, 

 mostly 1-celled, the carpels rarely becoming distinct in 

 fruit ; style short, stigma simple or divided ; ovules an- 

 atropous. Fruit a capsule, generally dehiscent by pores 

 or valves. 



.Flowers regular. 



Uppermost leaves opposite. 



Filaments very broad; carpels distinct in fruit. 1. PLATYSTEMON. 

 Filaments filiform or nearly so; capsule 1-celled. 



2. PLATYSTIGMA. 

 Reaves all alternate. 

 Flowers large, white. 



Perennial; capsule many-celled. 3. ROMNEYA. 



Annual; capsule 1-celled. 7. ARGEMONE. 



Flowers yellow or orange. 



Shrub; flowers yellow. 4. DENDROMECON. 



Herbs; flowers usually orange. 5. ESCHSCHOLTZIA. 



Flowers reddish. 



Stigmas tufted at the end of the short style. 



6. MECONOPSIS. 



Stigmas sessile, radiate. 8. PAPAVER. 



Flowers irregular. 9. BICUCULLA. 



