71 tips, f ol] ov;ed by a pair of longer, sub-cyllndric or 



semi-cylindric leaves united and often sv/ollen et the 

 base. 3 



Leaf-pairs of small, sometimes not very dissimilar and, when 

 dormant, closed together or enclosed in an entire or frey- 

 ed and v.'ithered skin, or united for part or nearly all 

 of their length, with or v/ithout longer free tips; plants 

 tufted, or with railing or matted, elongated stems; 

 leaves sometimes minutely ciliate; stigiaas usually 5; 

 expanding-keels diverging from their base, v^ingless; 

 cells roofed vdth cell-v.ings end v.ith a placentel tuber- 

 cle, which is sometimes very small. ('^Fps "^^ genus, 

 M. umbellrtum, Linn., but to this group of the genus be- 

 long I-, pulchellum, ^vj. , li. pygmaeum, Hav,-. , and ^«-. evolu- 

 tura, N, S, 3r,), Mesembryanthemum. 



3. Stems erect, with beed-like joints or internodes 3-7 lines 



thick; stigmas, 6-7; expanding keels of fruit broad and 

 flattish, with marginal wings, and v.'ith the inner edges 

 raised: cells^ roofed v;ith cell-wings; placental tubercle 

 none, (Type M, moniliformis, ^^chwant.), i'ionilaria. 



Stems slender, not more end usually less than 2 lines thick, 

 terete, not at all bead-like. 4 



4. Leaves and all green narts minutely napulose. 5 



Leaves smooth, dotted, not papulose; strmens collected into 

 a cone, concealing the stigmas and surrounded by 2-3 series 

 of staminodes; stigmas 10, erect, subulate; ovary flattish 

 at the top; expand^ng-keels of the fruit diverging, 

 winsed; cells roofed with cell-v;ings and v/ith a placental 

 tubercle. (Tyne "V. angustipetala, ^'^. 2, Br,), Vanzijlia. 



5. Very dvmrf shrublets 3-5 inches high, with erect or ascending 



branchlets ; stam.ens erect, apparently concealing the 4- 

 7 minute, subulate stigmas; ovary flattish or slightly 

 convex on the top; expanding-keels of fruit contiguous 

 or narallel, with marginal vangs: cells roofed with cell- 

 wings; placental tubercle none. (Type D. i'eersoni, N. ^, 

 Br.). Dicroceulon. 



Ife.in stems more or less prostrate, v/ith short, ascending 

 branchelets; st?;^mens erect in a ring around and exposing 

 the 5 radiating, plumose stigmas; ovary much depressed, 

 crater-like at the top; expanding-keels of fruit v.ddely 

 diverging, v/inged at the apex; dells roofed with cell-wings; 

 plpcental tubercle none. '(■'•ype, ^. tinctus, N. E. Br.), 

 - es. tinctum, L, 3ol.). Deps carpus, 



6. Leaves, all green parts, and often the stems papulose, 



i.e., the vihole ieaf-surface denselj'" covered with raised 

 ce"'ls, v/hich are 15 ke small or minute pimples, or are 

 pointed at one or both ends lengthvdse to the leaf; sta- 

 mens collected into a cone or cylindric mass; stigmas, 

 valves and cells of the fruit usually 5, or occasionally 



