588 



BOTANY 



VAKT II 



the projection inwards of the numerous placentas. Fruit ripens erect on the 

 peduncle. In Papaver the separation of the central portion of each carpel from 

 the placentas at dehiscence is limited to the tips of the carpels. These bend out- 

 wards just below the flat stig- 

 matic expansion, and the kidney- 

 shaped seeds are thrown out of 

 the small openings when the 

 capsule, borne on its long stalk, 

 is moved by the M-ind. 



Official. — Papaver somni- 

 femm, the Opium Poppy, yields 



PAPAVERIS CAPSULAE and OPIUM. 



Papaver Rhoeas yields rhoeados 



PETALA. 



Family 2. Fumariaceae. — 

 Glabrous herbs, without milky 

 juice, with bipinnate or tri- 

 pinnate leaves. Flowers bimer- 

 ous throughout ; the number of 

 whorls in the corolla is doubled. 

 Floral formula, K 2, G 2 + 2, A 2, 

 G (2). The outer petals, or one 

 of them, bear spurs. In the 

 latter case the flower is trans- 

 versely zygomorphic (Figs. 578, 

 579). The inner whorl of 

 stamens is suppressed. The 

 stamens of the outer whorl are 

 each tripartite, consisting of a 

 central anther with two thecae 

 and two lateral anthers each 

 with a single tlieca borne on a 

 common filament. In Hypccoum 

 the lateral branches join in 

 pairs, and apparently form the 



Fio. 570.— Floral rliagraiiiof G7ai(,,j»»i. 

 (After EicHLKit.) 



Fig. iJ77.—J'apaver llhoeas (\ iiat. size). Official. 



inner staminal whorl, the position of which they occupy. The transversely 

 zygomorpliic flowers of tlie Fumariaceae with only one spur afford the only example 

 of this type of symmetry. The fruits of Fumaria are nutlets, those of Corydalis 



