71 11, Leeves toothed on their margins and often on the keel, 

 united only at the base; exnanding-keels of the fruit 

 diverging from the base; bushy, branched, dv/arf shrubs, 

 gvlebrous, C^ype, 0. deltoides, SchT./\rant. ^ ^'^es. deltoides, 

 Linn.). Oscularia. 



Leaves not toothed, united in pairs fo i-i of their length 

 small shrublets or prostrate plants, glabrous or velvety- 

 puberulous to the touch; fruit with the expsnding- 

 iceels contiguous or diverging only at the apical part, 

 and with the cell-wings rudimentary or well developed. 

 (IHrne, S, edentulus, N, S. Br. ^ I-Ies. edentulinn, Kf -•, ), 



Echinus. 



IS, Stigmas more or less exosed to viev/, stoutly subulate or 

 ©■^ate-subule te or plumose; overy flattish or convex at 

 the top; expanding-keels of fruit vn".th marginal wings; 

 cells roofed with cell-v.'ings, but without a placental 

 tubercle; erect shrubs, shrublets or prostrate plants; 

 flowers mostly solitary, sometimes three together. 

 (Tjrpe, L, multiradiatus, ^\ e. Bp, ^ ^-^s. raultiradiatum, 

 ♦Tac , q . ) . Lamp tran thus . 



Stigmas apparently well exposed to viev/, erect, filiform 

 with the stamens in a ring around them; ovary deeply 

 concave on the tons; expanding-keels closely contiguous 

 'throughout end reaching to the tips of the valves, en- 

 tirely without marginal wings; cells open, without or 

 v/ith rudinenter^'' cell-wings and without a placental tuber- 

 cle; stems slender, prostrate, wi th _distinct internodes, 

 glabrous; flov/ers solitary. (Type, l^, intervallaris, 

 N, S, r. ji Ruschia intervallaris, L, ^ol.). Mossia, 



13. Leaves scarcely or but slightly united at the base, dis- 



tinct from and not continuous with the stem. 14 



Leaves completely united at the base and continuous v/ith 

 the green, fleshy stem, always short and usually less 

 than half-an-inch long. 15 



14, Leaves an inch or more long and more than i-inch thick, 



trigonous, the keel often dilated near the apex, obtuse, 

 almostly spurred at the base; flov/ers solitary, too 

 inches or more in diameter; calyx un-eoually 4-lobed; 

 outer stamens erect in a ring and the inner crov/ded to- 

 gether, no staminodes; stigmas 8, short and stoutly 

 subulate; fruit unknov/n; erect shrub. (Type S. octonaria, 

 N. "S. Br. j:;. Mes. octonarium, L, BqI,), Enarganthe. 



78 Leaves not more and usually less th: n an inch long, and 

 not 1/4 inch thick; flov;ers often 3-4 togeth-rr - t the 

 ends of the branches, about an inch or less than an inch 

 in diameter; calyx sub-equally 5-lobed; in stamens e- 

 verlt in a compact cone or column, v/ith or without a fev/ 

 staminodes; stigmas 10-12, subulate; expanding-keels of 

 fruit v/inged, the cells roofed with cell-v/ings end with a 

 placental tubercle; erect or decumbent shrublets v/ith 



