A prostrpte, succulent, perennial herb, with distinct intcr- 

 nodes on the me in stems. Leaves or^nosite, united at the base, 

 trigonous-ovete. ?lov;ers solitpry, terminel, on very short ped- 

 icels or subsessile betv/een the leaves, ^alv^c produced into a 

 very short tube or cup above its union with the ovary, sub-equally 

 5-lobed above. Petals arising at the base of the caljrx-lobes end 

 above the ton of the ovary, in 1-2 series, shorter than the calyx- 

 lobes, "tamens numerous, erect, in a ring around the stigmas 

 no staminodes. Glands forming a shallov cup or bowl on the top 

 of the ovary, wjf' five bropd crenations on the margin. Stigmas 

 5, erect. Ov^ry inferior, concave et the top, 5-celled. Placen- 

 tas on th^ fl&or of the cells. Capsule small, very shortly and 

 broadly obconic, v/ith five Vflves rnd cells; valves closing after 

 expansion; exppnding-keels closely contiguous throughout and reach- 

 ing to the apex of the valves, v/ithout margingal wings; cells open 

 or with very rudimentary cell-wings and without a placental tuber- 

 cle. Seeds ovoid, smooth, 



" monot-'Tic eenus, of which the type is 1-. intervallaris, 

 N. E. Br.; native of the Transvaal end neighbouring ^^^reas. 



The name is given to commemorate I'rofessor G. -2, I'-'^oss, one 

 of the foremost of South -t^frican botanists, whose name I have great 

 pleasure in associating with f is very distinct plant. 



1, M. intervallaris, N. S, Br,__ interns rooting at the nodes, 

 with internodes 3-16 lines long and i-1 line thick, ^eaves 3-5 

 lines long, 2^-3 lines bropd and l|--2 lines thick, distant on main 

 stems and coT'owded into small tufts 5-9 lines long on the very 

 short axillary branchlets, trigonous-ovate, sub-acute, narrowed to 

 the base from about the middle, flat on the face, keedl on the 

 back, sometimes entire, but often with 1 or 2 obscure and very 

 blun"^ teet'i or slight angles on the edges and keel near the apex, 

 covered with slightly prominent dots, dull sub-glaucous green. 

 Calyx shortly obconic belov^. Produced about ;|-a7r^-ine long above 

 the ton of the ovary; lobes 2-| lines long, l4:-lt line broad, ob- 

 long, obtuse, the tv/o outer v;ith a compressed keel et the apex. Co- 

 rolla about half -en-inch in diameter, expanding at night at about 

 9.30 p.m.; outer petals about 2-3 lines long and 1-2/3 line broad, 

 linear or linear-lanceolate, obtuse or sub-acute, the inner smaller, 

 pale cream^y-yellow, almost white. Sfemens 1-| line long, v/hitish. 

 Glandular cur on the t p of the ovsry about *-line deec. ■Stigmas 

 1 line lonp-, subulate, erect. Cgrsule about of lines in diameter 

 when expanded, entirely nale honey-coloured within^ valves broader 

 then long, otherv/ise as noted under genus. Seeds "-t-line long. 



-'esembryanthemum intervpT lere, L, Bol. in ^nn. ^ol. Herb., 

 Vol. IV, p. 81, (On p. 71 this name should be substituted for 

 P.uschia intervallaris, L. Bol., which vras entered by mistake oving to 

 Mrs. Bolus having used the same specific name under both genera). 



South -A.frica5 Transvaal; near Johannesburg, ^^^oss 13,870, 

 1'7274, near Alberton, '^'ood, near Lake Chrissie, Bienkiron in Herb. 

 I'^jss 16,565, Herschell -^ivis^on; Sterkspruit, Hepburn, 



ENARGANTH3, N, E. Br. 



Ihvarf , shrubby, succulent perennial, v^ith woody branches and 

 distinct internodes. Leaves opposite, not united at the base, 

 stoutl7/ trigonous, not papulose, ^'lov^ers solitary, terminal, sub- 

 sessile or shortly pedicellate, large ens showy, Cgiyx unequally 



