136 BOTANY OF THE VOYAGE OF THE SULPHUR. 
varies much in the breadth of the leaves and the number of flowers in the cyme, 
but it is readily known by the peculiar brown colour and texture of the sepals 
when dry. It is surprising that Choisy should not have met with it from America, 
as I have it from the West Indies and Guiana, as well as from tropical Africa. It 
has not the slightest resemblance with J. tyrianthina, to which Choisy refers the 
Conv. densiflorus. 
572. Ipomma microsepala, sp. n., caule volubili tenui glabro vel longe patentim piloso, foliis 
cordatis acuminatis auriculis baseos rotundatis membranaceis glabris opacis, pedunculis tenuibus 
vulgo folia superantibus laxe plurifloris, sepalis parvis oblongis obtusis mucronatisve, corolla basi 
longiuscule attenuata superne campanulata glabra.—Acapulco; some specimens from Tumaco in 
fruit only, appear also to be the same species. 
Habitu accedit ad Quamoclit coccineam. Folia 1-2-pollicaria, acumine longo vel brevi obtuso vel rarius 
acuto, non pellucida, petiolo tenui pollicari vel paullo longiore. Pedunculi graciles, glabri, 1}-3-polli- 
cares; flores in cyma 8-12, nunc 1-3, breviter pedicellati. Bractece parvee, lineares. Sepala subeequalia, 
vix linea longiora, margine subscariosa. Corolla fere pollicaris, in sicco lutea videtur, an alba? Ovarium 
2-loculare, 4-ovulatum et stigma Ipomew. Capsula globosa, glabra, 2 lin. diametro, calyce patente suffulta, ei 
Quamoclit coccinee similis sed bilocularis sub-4-valvis. 
573. Iromma oocarpa, sp. n., volubilis, gracilis, glabra, foliis breviter petiolatis cordatis 
acuminatis pellucido-punctatis, pedunculis 1-3-floris folio longioribus ramulisque glutinosis, sepalis 
ovatis obtusis, corolla basi longiuscule attenuata superne campanulata glabra, capsula ovata glabra 
ealyce multo longiore.—Guayaquil. 
Ramuli graciles, fere filiformes, juniores uti pedunculi et petioli glutinosi. Petioli 1-3 lin. longi. Folia 
1-1}-pollicaria, forma iis I. microsepalw similia, punctis parvis oblongis pellucidis conspersa.  Pedunculi 
tenues, rigiduli, 2-3-pollicares, apice 1-3-flori, pedicello primum florente brevissimo, post anthesin incrassato 
recurvo, 1-2 tardioribus elongatis tenuibus. Sepala parum inequalia, exteriora 1} lin. interiora 2 lin. longa, 
margine subscariosa, in fructu paullo aucta, latiora. Corolla pollicaris, ex sicco purpurea vel rubra videtur. 
Genitalia corolla paullo breviora. Stylus et ovarium Jpomew. Capsula 4-5 lin. longa, 4-valvis, glabra, abortu 
sepius 1-2-sperma, 
574, Ipomm@a puncticulata, sp. n., caule volubili gracili glabro, foliis petiolatis cordatis vel 
hastatis acuminatis supra glabris vel brevissime glanduloso-puberulis minute pellucido-punctatis 
subtus lepidoto-glaucescentibus, pedunculis 1-3-floris, sepalis ovatis obtusis, corolla basi longiuscule 
attenuata superne campanulata.—Mexico. 
Habitus, calyces et corolla J. oocarpe ; pedicelli breviores, et foliis facile distinguenda. 
The three last species have at first sight considerable resemblance to each 
other in foliage, in the small size of the calyx, and the shape of the corolla, but 
are perfectly distinct from each other, especially in the dotting of the leaves, and 
the two first in the capsules. I do not know of any species nearly allied to them, 
and amongst the descriptions in the Prodromus none appear to come near to them 
except perhaps the I. aristolochiefolia. : 
575. Troma trifida, Don.?—Chois.? in DC. Prod. v. 9. p. 383.— Acapulco, Realejo, 
