KEY TO THE SPECIES 27 



XXII. BERBERIDACEiE (Baebekrt Family) 



Low shrubs with alternate compound leaves without stip- 

 ules ; sepals 6, petals 6, and the 6 sensitive stamens opposite 

 them ;■ the anthers open at the top by uplifted valves ; the 

 single pistil becomes a 1-3-seeded berry. 



1. BERBERIS (Barbebkt) 



Shrubs with yellow wood and yellow flowers in dense racemes ; the style short 

 and the stigma peltate. 



1. Berberis Aqulfolium Pursh (Trail;ng Baeberry. Oregon Grapb). 

 Low, mostly creeping among rocks or on stony slopes ; the leaves evergreen ; 

 leaflets 3-7, ovate, acute, spiny-toothed ; racemes terminal ; the berries blue or 

 purple. 



XXIII. PAPAVERACEiE (Poppy Family) 



Herbs with alternate leaves, 3 ephemeral or scale-like sepals, 

 4-6 petals, 6 to many stamens (opening lengthwise), and a 

 single pistil ; the fruit a 1-celled pod or capsule. 



1. Argemone. Stem spiny ; sap yellow ; leaves glaucous. 

 a. l^nomegra. Stem spiny and densely hispid ; sap milky ; leaf not glaucous. 

 3. Capnoides. Stems smooth ; sap watery ; leaves decompound and glau- 

 cescent. 



1. ARGEMONE 



Spiny branching herbs, with sessile, lobed, spiny-toothed leaves, which are 

 glaucous and more or less blotched with white ; flowers large and showy, with 2-3 

 sepals bearing a horn-like spine near the tip ; capsule spiny, opening by several 

 valves at summit. 



1. Argemone intermedia Sweet. (Spiny Poppy). Tall, often 1 m. high, 

 freely branching ; flowers white, 6-9 cm. broad ; the petals broadly obovate. 

 Common on sandy plains. 



3. ENOMEGRA 



Characters much like those of Argemone, but the stem and leaves densely 

 bristly and less spiny ; the leaves a dull green with some puberulenoe and slightly 

 if at all glaucous ; sap thick, milky-white. 



1. Enomegra liispida (Gray) Aven Nelson (Htspid Poppy). Erect, branch- 

 ing, 4-8 dm. high ; sepals hispid on the horn-like tip ; petals white, obovate, 

 about 3 era. long ; capsule armed with stout, hispid spines. Frequent on sandy 

 slopes and valleys. 



3. CAPNOIDES 



Pale leafy-stemmed herbs, with compound dissected leaves and racemes of 

 yellow flowers ; 8 small sepals and 4 connivent petals (1 of the outer is spurred 



