each crenature, small and net unlike those of the Rarpsatis 
tribe. The base is occupied by the germen, which is 
nearly'spheerical, pale green, smooth. Calyx of three small, 
oval, concave, brownish, scariose leaflets, but gradually 
becoming larger and more petaloid, and passing almost 
insensibly into the five, pale yellowish green, spreading 
petals: tube none. Stamens numerous, inserted within the 
united bases of the calyx and corolla. Filaments rather 
longer than the corolla, white. _Anthers didymous, yellow- 
ish white. Style filiform, as long as the stamens. Stigmas 
four, or generally five, linear, recurved, pubescent, white.. 
A flowering specimen of this singular species of Cacrus 
was obligingly communicated, in. November, 1827, by 
Mrs. Arnotp Harrison, of Aigburgh, together with an 
excellent sketch of the natural size of the plant; which 
last is copied on a very reduced scale at fig. 1. of the 
accompanying plate. That lady received it from her 
brother Wituiam Harrison, Esq. of Rio, who discovered 
it in the Organ mountains. I was at first disposed to con- 
sider it distinct from Cacrus alatus, more, however, from 
the country which it inhabits (so distant from Jamaica, 
the only station hitherto given for that plant), than from 
any other circumstance: for I have generally considered 
the Cacti to be peculiarly local in their geographical dis- 
tribution. Swartz’s description, however, especially his 
account of the size and colour of the flowers of his Cactus 
alatus, is suchas to forbid their being kept separate : at 
the same time, as there is no figure of the plant existing, 
I cannot determine the point with certainty. Stone refers 
to Cacrus Phyllanthus in Piuxenet, which has unusually 
large flowers ; whereas our plant has rather the blossom of 
the Rurpsauis than the Paytuanruus tribe: thus shewing 
that a similar habit in the plant and in the flowers are 
not always combined in this tribe, and that we ought to 
be-cautious how we separate this family into Genera’ Mr. 
Haworrn had never seen the inflorescence, which does not 
agree with his*Genus Erienytium. 
_ Fig. 1. Reduced figure of the entire Plant. 2. Portion of ditto, natural 
size. 3. Stamen. 4. Pistil, with the Germen cut through —Magnified. 
3 
