71 4 or 6; fruit with winged expanding-keels and the cells 



v/ith well-developed or rudimentary cell-v/ings, 7 



Leaves not nar^ulose 8S seen by the naked eye, but some- 

 times vrith raised, scattered dots, more oftehn quite 

 smooth. (Some species of i^'esembryanthemum I have not 

 seen ere described ns minutely pepillate, but I believe 

 this refers only to a microscopic elevation of the surf- 

 ace-cells not distinctly visible to the naked eye, as in 

 the sense above intended.) 8 



7. Leaves tipped with a tuft of smell bristles, and the ele- 



vated surface-cells often pointed at one or both ends, 

 sometimes entire; stems papulose or sometimes slightly 

 setose; stigmps shorter than the stamens; fruit with the 

 exnan ding-keels contiguous and v/ithout placental tubercles. 

 (Type, T. barbatum, N. S, Bp, - '■'•'. steliigerum, "^chv/ant. 

 ^ Mes, barbatum, Linn,), 'i'richodiaderaa. 



Leaves without a tuft of bristles at the apex, surface 

 cells entire; stems papulose or with short birstles or 

 hairs upon it; stigmas usuall" as long as or longer (but 

 sometimes shorter) than the stamens, not plumose; expan- 

 ding-keels of fruit contiguous, parallel or diverging; 

 placental tubercle usually absent, sometimes present and 

 small a'^d double, rarely large and cnnspicuous. ('%De, 

 D, hisrldum, '^chv/ant. j^ iles. hispidum, ^inn. ) , 



Drosanthemum, 



8. Stigmas, valves and cells of the fruit usally 5, occasion- 



ally 4, 6 or 7. 9 



Stigmas, valves and cells of the fruit usually 8-12, occ- 

 asionally 7; erect shrubs or shrublets. 13 



9. Stamens collected into a cone or compact column free from 



the petals to their base, concealing the stigmas and often 

 surrounded by 1-3 series of ?taminodes. 10 



Stamens not collected into a cone or compact column, often 

 more or less lax, usually without, but sometimes vi/ith 

 stsminodes; stigm^.s not concealed. 12 



10, Expanding-keels of the fruit with marginal wings and more 

 than half as long as the valves, and the cells v/lthout 

 a placental tbercle; stigmas equalling or shorter than 

 the stamens, 11 



Sxpanding-keels of the fruit without marginal v;ings and 

 only about hal^ as long as the valves, diverging; cells 

 with a placental tubercle, which is occasionally minute 

 and may sometimes perhacs be absent; usually erect shrubs, 

 shrublets, or decumbent or prostrate plants vith v;ell 

 developed internodes , but sometimes very dwarf and tufted, 

 without internodes betv;een the leaf-pairs; flov.'ers cy- 

 mose or solitary. (I^pe, iJ^, umbellatum, Linn.). 



I^iesembryanthemum, 



