41S so p ?=■■ to -''orm one centre!, -cute keel; cells open, \.itn- 



out cell-wings or vdth e tubercle st the opening; seeds 

 smell, not flPt nor winged, irreg!;ulsrly arrenged in the 

 cells; two C!?lyx-lot:'es often much If-^rr'i^r than the others 

 ?.nd lep'f^y 6 



5, Style either none or very short end the d-la s-cigmas long 



end filiform, or the style rether lonr ?■ nd slenderly 

 conical with severs! (7 or 8?) minute linear stigraas at 

 the apex 28, Thyrasperma 



Style funnel-shaped, somewhat membranous, with 9-12 pap- 

 ille-like stip^mes on the surface of its rim 



28, Hymenogyne 



6, Leaves f Ic t and more or less distinctly petiolate or 



much narrowed into a sort of stalk at the base 7 



Leaves sessile 9 



7, Flowers solitary and axillary or in the forkings of the 



branches; stigmas and vplves of the fruit' four 8 



Flo\"ers in terminal c3TiLes or cymosely arranged; leaves 

 often very large. Annual or biennial plants 



17, Cryophytiim 



8, Leaves ovate-lanceolate or lanceolate; calyx produced 



above the ovrry into a short tube; stigmas stout; 

 v.alves of the capsule vrith inflexed marginal flaps for- 

 ming pockets, and v/ith the xpanding-keels thin, deep 

 and toothed 20, I'latythyra 



Leaves cordate; calyx lobed dovn to its union v.'ith the 

 ovary; stigmas minute; valves of the capsule without 

 wings or flans, and their expending -keels neither 

 thin end deer^ n6r toothed 21, ^ptenia 



9, Leaves flet, broader than thick; flowers terminal and 



solitary or in few or in many-flov;ered cymes 10 



Lerves subterete or semiterete, not or scarcely broader 

 then thick; very dvrarf erect annuals with disfnct inter- 

 nodes between the leaf-pairs and terminal solitary or 

 cymose flowers; stem and leaves stout and probably 

 pulpy 24, Opophj'-tum 



10, Perennials; leaves under natural conditions v;ithering to 

 a skeleton and persisting, several times broader than 

 thick; valves of the capsule without wings or flaps 



22, >3celetium 



Perenniels; leaves not v/ithering to a skeleton, moderttely 

 thick in proportion to brecdth; valves of the cr:sule 

 with large erect or inflexed flaps 18, Prenia 



Annuals, leaves not v/ithering to a skeleton, menj times 

 bro?=der than thici'; vr].ves of the capsule vdth inflex- 

 ed -PT-rs 23, -^ynaptophyllum 



