MR. J. MIERS ON THE HIPPOCRATEACEJE OF SOUTH AMERICA. 353 
rotundiusculis, apiee brevissime ac obtusule apiculatis aut emarginatis, subintegris 
vel rarius remote subserratis, subcoriaceis, supra pallidissimis, valde opacis, nervis 
tenuissimis subimmersis, subtus brunnescenti-opacis, sub lente minute crystallino- 
granulatis, nervis venisque pallidis prominulis; petiolo tenui, pallido, semitereti, 
limbo 10-plo breviore: paniculis axillaribus, brevibus, pedunculo fructifero incras- 
sato: capsulis 3, distinctis, obcordato-ovatis, apice late emarginatis, valde compressis, 
medio subcarinatis, cano-opacis, nervis plurimis furcatim parallelis striatis; semi- 
nibus imo longe alatis. In Mexico: v. s. in herb. Hook., prov. Oaxaca, in litoribus 
maritimis cirea Tehuantepec (Andrieux, 479, in fructu, sub nom. Hippocratea 
excelsa). 
This is a tree 20 to 25 feet high, with an erect trunk and non-scandent branches, cer- 
tainly different from .H. excelsa in the size, shape, and texture of its leaves, and in its 
more irregular rugous branches, with more approximated axils. Its leaves are 11-23 in. 
long, 13-13 in. broad, on a petiole 2-3 lines long. The obtusely obovate capsules are 
2 in. long, 13 in. broad, with an apical sinus 3 lines deep; the seeds are 15 lines long, 
6 lines broad, the upper embryonal discoid portion being about one third of the length, 
and ovate as well as oblique. 
32. HIPPOCRATEA INTEGRIFOLIA, A. Rich. in La Sagra, Fl. Cub. 252 (non Seem.); Walp. 
Rep. ii. 812: volubilis, ramulis flexuosis, interdum spiraliter tortis: foliis oppositis, 
ovalibus, utrinque obtusis, glabris, integris, subcoriaceis, subtus nervis venisque 
reticulatis prominentibus; petiolo brevissimo: paniculis axillaribus et termina- 
libus, laxis, paucifloris; sepalis ovalibus, obtusissimis. In Cuba (-La Sagra; non 
vidi). 
Dr. Seemann's plant from Veraguas, which he referred to this species, ill accords with 
the above description; it belongs, as I have shown, to the genus Cuervea. The other 
plants from Guiana, Jamaica, and St. Vincent's, quoted by him as specifically identical, 
and which he had seen in the Hookerian herbarium, unquestionably belong to the genus 
Pristimera. The plant described by Richard is perhaps allied to Hippocratea ovalifolia, 
differing in its entire leaves; or it is as likely to belong to some other genus. 
93. HIPPOCRATEA UNIFLORA, Moc. Sess. in DC. Prodr. i. 567: foliis oblongis, basi cor- 
datis, integris; pedunculis unifloris; petalis ovatis, obtusis; carpellis obcordatis. 
In Mexico. | 
Nothing is known of this species beyond the above very incomplete description. It can 
hardly belong to Hippocratea, on account of its one-flowered peduncles: in this latter 
respect it accords with the genus Raddia; but its carpellary fruit is against this sup- 
position. 
2. PRIONOSTEMMA. 
This genus is proposed for a few plants, chiefly from Guiana, which have been hitherto 
placed in Zippocratea, to which they certainly offer a general external resemblance ; but 
there is a great dissimilarity between them in many essential points of structure. The 
