44 BOTANY OF THE VOYAGE OF THE SULPHUR. 
149. Apronta gracilis, sp. n., pubescenti-vicosa, foliis ovatis oblongisve obtusissimis sinuato- 
lobatis.—Bay of Magdalena. 
A. umbellate affmis quidem, sed distincta videtur eaule petiolis pedunculisque multo gracilioribus, et 
preesertim foliis tenuibus omnibus obtusissimis, et margine utroque in lobos 2-4 latos breves obtusissimos inciso. 
150. Oxyparuus levis, sp. n., glaberrimus, foliis petiolatis cordato-ovatis, involucro unifloro, 
perigonio florido paullo breviore, staminibus 5 exsertis.—Bay of Magdalena, 
Folia et habitus fere O. glabrifolii, sed undique, etiam in inflorescentia, glaberrimus. Caulis basi albidus. 
Folia longiuscule petiolata, inferiora sesquipollicaria, late cordata, obtusiuscula, integerrima vel vix sinuata, 
crassa, enervia, cujusve paris sepius eequalia; superiora minora, angustiora, acutiora, sessiliora, Flores ad apices 
ramulorum pauca, Involucrum calyciforme, breviter pedicellatum, 3-4 lin. longum, profunde 5-fidum, laciniis 
lanceolatis acutis valde ineequalibus. Flos sessilis, tubo subgloboso, fauce constricta; limbus late campanulatus, 
4 lin. longus, brevissime 5-lobus. Stamina 5, ad faucem inserta, distincta, corolla longiora. Ovarium in fundo 
tubi inclusum. Stylus exsertus, apice crasse capitato-stigmatosus. Fructus non vidi. 
In the generic character of Oxybaphus, it is usual to give the number of 
stamens as three, but they vary from two to five in this as well as in some other 
Nyctagineous genera. 
151. Aruionta (Wedelia) malacoides, sp. n., hirsuta, foliis ovatis sinuatis, involucro triphyllo 
trifloro.— Bay of Magdalena. 
Caules e radice perenni plures, tenues, ramosi, pedales vel longiores, pilis albis subviscosis hirsuti. Folia 
opposita, cujusve paris valde ineequalia, fere Hrodii malacoidis, majora semipollicem ad pollicem longa, obtuse et 
obscure sinuato-lobata vel rarius subintegerrima, apice acuta vel obtusa, basi rotundata seepius inzequilatera, 
utrinque viridia et hirsuta, peliolo 2-6 lin. longo. Folium alterum ejusdem paris triplo quadruplove minus. 
Pedunculi axillares, 3-6 lin. longi, monocephali, in racemos axillares foliatos breves dispositi. Involucri foliola 
ovata, hirsuta, 2 lin. longa. Flores involucro breviores, sessiles. Perigonii tubus brevis glaber ; limbus 
obovoideo-inflatus, hirtus, ore obliquo, dentibus 4 brevibus conniventibus. Caryopsides involucro paullo 
breviores, ovoidew, glabra, dorso convexe leves, facie interna cyathiformes, marginibus inflexis dentatis. 
Semen perfectum non vidi. 
PoLyGoneEz. 
152. PrenostEcta macroptera, sp. n., ramulis junioribus cano-tomentosis, foliis obovatis spathu- 
latisve apice obtusis integerrimis, involucro fructifero maximo hyalino reticulato dorso late bialato 
apice obsolete trilobo,—Bay of Magdalena. 
Caules tenues, rigiduli, dichotome ramosi, ramulis junioribus pube’ brevi incanis, demum glabratis rubes- 
centibus, ad nodos tumidulis. Folia opposita, membrana angustissima su 
é aR beonnata, exstipulata, 4-6 lin. longa, 
obtusa, integerrima, basi in petiolum brevissimum contracta, crassiuscula, subcarnosa, enervia vel vix basi 
uninervia. Pniyokases — sessilia, diphylla, uniflora, florida rubida vix lineam’ longa, foliolis late 
reniformibus apice obtusissime sinuatis vel obscure rotundato-trilobis, basi trinerviis, nervis mox in rete venarum 
ramosissimum anastomoeantibus. Flos brevissime stipitatus. Perigonium profunde sexfidum, laciniis oblongo- 
linearibus obtusis, interioribus ut primum paullo minoribus, post anthesin omnibus subeequalibus, . Stamina sex ? 
