878 
HIBISCUS unitfefis. 
One-toothed Hibiscus, 
aiONA Df: LPl I lA PO I Y. I X U R I A . 
Nat. ord. Malvace^ Juss. D.C. Prodr. 1. 429. 
HIBISCUS. L. Vide 4upr0, foL QOQ. 
: -y 
Sect. VI. AbelmMchu*. Curpella polyoma. Semina glabra aut in 
dono ]iaea subvillosa. Corollas exj^nsae. Involucella foliolis 8-15 
integris constantia. Dec. I. c. 
§ 1. Caule tuberculis aculeato. 
H. umdens y caule sparsini aculeato et piloso, foliis glabriusculis eglandu- 
losis grosse dentatis, nunc palmato-o-partitis, nunc subrotundis, floribus 
pedunculatis, iuvolucelli folioUs cai^ipis loDgttudine intttt deDte;iuuc9 
infr^ apicetn appendiculatis. 
Caules erecti, virides, pilis tnollihus, recurvis vcstiti, et aculeis parvis, 
sparsis, abbidis armati. Folia longissime petiolata, grosst dentata, glabrius- 
cula, subtus eglandulosa, biformia ; nunc palmato-a-partita ; lobis lanceo- 
latis; nunc subrotunda, indivisa. Petioli subtus aculeati, rigidi, foliis in- 
ferioribus multo longiores. Stipulae membranacea, subulatce. Flores magni, 
sulphurei, infundofusco-pnrpurei: pedunculo molli, piloso, inermi, petiolo 
multo breviore. Involucelli foliola 8, hispida, patentia, calyci subaqnalia, 
lineari-lanceolata, infra apicetn pauld constricta, et ibi daUe unico interiore 
aucta. Calyx 6-lohus, undique pilis mollibus reatrm, et aeuleoU* Hmidus; 
lobis acuminatiSf trinervibus. CotoUa expansa, ad marginem mmnlat ^- 
crispa, citir marcescens. Ovarkim ovatum^striummt &-hemlmret ioaUU 
4-sptrtnis, onUU uniformibwf iglabris. ^ 
A new species of Hibiscus, raised at Mr. Colvill's Nur- 
sery, from Brazilian seed. To the Hibiscus canmbintis of 
the East Indies it is nearly related ; but, independently of 
the geographical differences between our species and that 
plant, there are some curious external discriminative marks, 
by which the two are decidedly to be distinguished. In 
Hibiscus canttabinus, tlie leaf-stalks and lobes of the calyx 
are each furuished with a gland, and the leaves are not 
shorter than their stalks ; in Hibiscus unidenSy there is no 
gland upon either the stalks of the leaves, or the lobes of 
the calyx; and the petioles of the lower leaves are very 
long and rigid. In the latter the flow^ are stalked, and 
