8738 
HIBISCUS unidens. 
One-toothed Hibiscus. 
——<>>— 
MONADELPHIA POLYANDRIA. 
Nat. ord. MALVACER Juss. D.C. Prodr. 1. 429. 
HIBISCUS. L. Vide supra, fol. 806. 
i th ee gt 
Sect. VI, <Abelimoschus. Carpella polysperma. Semina glabra aut in 
dorso linea subyillosa. Corolla expanse. Involucella foliolis 8-15 
integris constantia. Dec. l. c. N hes 
§ 1. Caule tuberculis aculeato, ~~ So REI SF, 
H, unidens ; caule sparsim aculeato et piloso, foliis glabriusculis eglandu- 
losis grossé dentatis, nunc palmato-5-partitis, hune subrotundis, floribus 
pedunculatis, involucelli foliolis calycis longitudine intus dente unico 
infra apicem appendiculatis. 
Caules erecti, virides, pilis mollibus, recurvis vestiti, et aculeis parvis, 
sparsis, abbidis armati. Folia longissime petiolata, grosse dentata, glabrius- 
cula, subtus eglandulosa, biformia; nunc palmato-5-partita; lobis lanceo- 
latis; nunc subrotunda, indivisa, Petioli subtus aculeati, rigidi, foliis in- 
Jerioribus multo longiores. Stipule membranacee, subulate. Flores magni, 
sulphurei, in fundo Jusco-purpures : pedunculo molli, piloso, inermi, petiolo 
multo breviore. Involucelli foliola 8, hispida, patentia, calyci subequalia, 
lineari-lanceolata, infra apicem pauld constricta, et ibi dente unico interiore 
aucta, Calyx 5-lobus, undique pilis mollibus recurvis, et aculeolis hispidus ; 
lobis acuminatis, trinervibus. Corolla expansa, ad marginem undulato- 
crispa, citd marcescens. Ovarium ovatum, sericeum, 5-loculare, loculis 
4-spermis, ovulis uniformibus glabris. » a 
A new species of Hibiscus, raised at Mr. Colvill’s Nur- 
sery, from Brazilian seed. To the Hibiscus cannabinus 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 cannabinus, the leaf-stalks and lobes of the calyx 
are each furnished with a gland, and the leaves are not 
shorter than their stalks; in Hibiscus unidens, there is no 
eland 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 flowers are stalked, and 
