162 Onagrarieae, 



semina solitaria, supra medium affixa; radi- 

 cula infera.) Circaea. 



2. Stamina 4. (fructas 1-locularis, non dehiscens^ 



semen abortu solitarium, pendulum^ radicula 

 supera.) Trapa. 



3. Stamina 8. (fructus 4-locularis, 4-valvis, poly- 



spermus.) 



a. Semina comosa Epilobium. 



b. Semina nuda Oenothera. 



Oenothera Linn. 



Calyx superus, tubulosus, cum ovario articulatns, de- 

 ciduus; limbo quadi-ipartito, rcflexo, regulari. Petala 4, 

 summo tubo inserta. Stamina 8, ibidem inserta, erecta 

 Tel adscendentia. Antherae lineares, dorso affixae, in- 

 cumbentes. Ovarium inferum, quadriloculare; ovula cre- 

 berrima, adscendentia. Stjlus 1. Stig^ma quadripartitum, 

 rarissime capitato-gflobosum. Capsula tetragono-prisma- 

 tica vel clarata, nuda, quadrilocularis, quadrivalvis ; val- 

 vis medio septiferis. Semina creberrima, nuda, affixa pla- 

 centae centrali, serius liberae. Integumentum dnplex; 

 exterius crassiusculum, crustaceum vel spongiosum; in- 

 terius tenuissime membranaceum. Embryo exalbumino- 

 sus, rectns. Radicula hilum spectans. Herdae, rarissime 

 8Ujffrutices. Folia sparsa, saepius dentata, sinuata, laci' 

 niata vel pinnatijida, Flores axillares solitarii vel termi- 

 nales spicati, plerumque sessiles, lutei, carnei, rosei vel 

 purpurei. 



1. Oenothera biennis Linn. Spec, 492. Flor, Dan, 



^.446. Lam.Ill,t,219.f.l, E7tgl.Bot.t.l53i, Sturm. 



Germ. fasc. 5. Cand, Prod. 3. 46. Mert, et Koch, 



Germ. 3. 7. 



Pilosiuscula; caule erecto, simplici vel superne ra- 



moso; foliis lanceolato-oblongfis vel ovato-oblongis, acu- 



tatis, remote denticulatis , planis; floribus axillaribns et 



