PAPAVERACE&. 137 



GENERA. 



I. PLATYSTEMONE.E. 



1. Platystemon Benth. — Flowers 3-merous; receptacle conoi- 

 dal with summit depressed. Sepals free, imbricate or contorted, 

 deciduous. Corolla double ; petals of each of same shape, imbricate 

 or contorted, deciduous. Stamens oo, hypogynous ; filaments 

 compressed ; anthers basifixed, extrorse 2-rimose. Carpels oo, 

 united at first into sulcate germen, projecting a little inwards into 

 oo-ovulate parietal placentas ; styles distinct, stigmatose within ; 

 mature carpels distinct linear closed torulose, transversely septate 

 within between seeds, separating into indehiscent, 1 -seeded joints. 

 Seeds albuminous. — An annual herb ; leaves alternate simple j flowers 

 usually opposite or 3-nate ; flowers long pedunculate, terminal or leaf 

 opposed {California). See p. 104. 



2? Platystigma Benth. — Flowers almost of Platystemon; stamens 

 indefinite or subdefinite ; filaments not dilated. Germen 3-quetrous ; 

 placentas 3, nerviform and scarcely projecting ; styles 3, distinct, 

 alternating with placentas, ovate or lanceolate, spreading, stigmatose 

 within. Capsule opening from apex into 3 valves, placentiferous on 

 edges. — Annual herbs, appearance and inflorescence almost of 

 Platystemon {Western North America). See p. 105. 



3. Romneya Harv. — Flowers almost of Platystemon; sepals 

 sometimes expanded into wings. Germen divided into oo complete 

 or incomplete cells ; placentas intruded, 8 -ovulate ; carpels united 

 into a ring, at apex diverging into as many styles, stigmatose within. 

 Carpels ovoid, densely setose . . . ? — A branched glabrous glaucous 

 herb ; leaves pinnatifid ; flowers terminal {California). See p. 106. 



II. PAPAVEKE.E. 

 4. Papaver T. — Flowers 2- or rarely 3-merous; receptacle a 



