501 
GENUS XV. PSAMMOGETON. 
Pentandria Digynia. Ser: Syst: 
Deriv. Fiom Psammos, sand, and Geton, near, alluding to the 
habitat of the species. 
Gen. Cuar. Margin of the calyx obsolete: petals obeordate, 
‘with an inflexed point: styles somewhat erect from a conical base: 
fruit terete ; mericarps with 5 primary filiform ridges, bearing glo- 
chidiate bristles, secondary ones bristly in a simple series: inters 
stices under the secondary ridges with single vittee: commissure 
flat, with 2 vittes: carpophore bipartite, free. 
(1) P. sirernatum. (Edgw.) 
Ident. Edgw. in Trans. Linn. Soc. XX. p. 57.—Walp. Ann, 
I. p. 355. 
Spec. Cuar. Annual, pubescent: branches stellately deeum~ 
bent: leaves hiternately divided: lobes cuneate at the base, 3- 
toothed; teeth acute, mucronate: glabrous above, hairy-pubescent 
beneath; umbels leaf-opposed, long-peduncled, 6—10-rayed : invo~ 
lucre 8-leaved; leaflets linear, acute, shortly ciliated towards the 
apex: involucel leaflets lanceolate, acuminate, ciliated, membrana~ 
ceous: exterior petals larger, 2-cleft, smaller ones purplish: stamens 
filiform, longer than, the petals. 
In sandy places in the North-West Provinces, 
ORDER LXVIII. ARALIACEZ. 
Trees shrubs or herbaceous plants with alternate exstipulate 
'Jeaves: calyx entire or toothed: petals 5-16, alternate with the 
teeth of the calyx: sestivation valvate: stamens as many as the 
petals, inserted below the margin of a large disk: anthers 2- 
celled: ovary coherent, 2 or more celled, rarely 1-celled : ovules 
solitary, pendulous: styles ‘as many‘as the ‘cells of the ovary, 
distinct, concrete or rarely wanting: stigmas simple: flowers 
‘umbelled or ‘capitate: fruit usually fleshy, 2-15-celled, very 
rarely 1-celled, crowned with the calyx : seed solitary, pendulous: 
‘embryo small, surrounded with a copious fleshy albumen, 
