414 MR. J. MIERS ON THE HIPPOCRATEACEJE OF SOUTH AMERICA. 
formis, ab hilo ad summum adscendens : infegumentum secundum opace brunneum, crasse papy- 
raceum, opacum, minute granulosum, apice puncto nigro notatum : infegumentum internum tenuiter 
pelliculare, pellucidum, celluloso-reticulatum : emóryo trigono-¢ylindricus, utrinque obtusus, exal- 
buminosus, solide carnosus, homogeneus (vel, ut videtur, e cotyledonibus 2 subæqualibus arctissime 
conferruminatis, cum radicula majuscula infera obtusa hilum spectante). 
Frutex Panamensis, alte scandens, ramulis levibus: folia opposita, elongato-oblonga, integra, flaccida, 
pallida, parallele et divergenti-nervosa, breviter petiolata : inflorescentia ignota. 
1. TYLODERMA PRACELSA, nob.: altissime scandens, ramulis tenuibus, teretibus, lzevibus, 
rufescentibus, striatis: foliis suboppositis, oblongis, imo rotundiusculis, apice in acu- 
men obtusulum attenuatis, integerrimis, subflaccidis, supra pallide viridibus, nervis 
plurimis tenuissimis parallele subdivaricatis arcuatim nexis vix prominulis; subtus 
pallidioribus, nervis venisque reticulatis haud prominentibus; petiolo tenui, flavido, 
canaliculato, limbo 20-25-plo breviore: fructu cucumiformi, pericarpio griseo sub- 
ruguloso, crassiusculo, ligneo-coriaceo, fibris lignosis longitudinalibus repleto, unilo- 
culari, 1-2-spermo : seminibus subtrigonis, erectis; testa crassissima, dura, crasse 
carinata. In isthmo Panamensi: v. s. in herb. Hook., circa Chagres, ad montem 
Limon (Hayes, 708). 
This is a plant growing in dense woods, and climbing to the summit of the highest 
trees, near the eastern extremity of the Panama Railroad : it must not be confounded 
with Sicyomorpha pruinosa, which grows about swamps, near the opposite or western ex- 
tremity of the same railroad. Its leaves are 5-10 in. long, 2-33 in. broad, on a slender 
petiole 3-44 lines long. No flowering specimens were obtained; and the fruits collected 
appear to have fallen to the ground; for they are not attached to the specimens. The 
fruit is 3$ in. long, 1 inch in diameter, with a hard coriaceous pericarp 1 line thick: it 
seems to contain two seeds 2} in. long, 9 lines thick, flattened by pressure on one side, 
subtrigonous, with a thick carina on the dorsal angle as above described: the solid fleshy 
nucleus, which fills the cavity of the testa, is 12 in. long, 6 lines in diameter. 
d 15. KIPPISTIA. 
This is a new Brazilian genus of very singular structure, the type being a plant found 
by me in the Organ Mountains in 1838, which I then carefully examined, both in flower 
and in fruit. Four species are here enumerated, among which is the Salacia serrata, 
Camb.: they are all glabrous, suberect shrubs or small trees, with opposite branches 
and leaves, all replete with spiral vessels; they have an axillary corymbose inflorescence, 
divided repeatedly into short dichotomous branches, ultimately presenting an aggregation 
of many flowers, upon extremely short pedicels. The flowers are rather small, of a 
yellowish colour, with five small sepals, and five larger suborbicular petals. The form of 
the disk is very peculiar, being about a fourth of the length of the ovary, which it sup- 
ports in the shape of a cylindrical column confluent with it, and is divided at its base into 
three equidistant projecting lip-shaped cups, in which the three stamens are located : 
these stamens are a little longer than the ovary, the filaments, almost terete, are nearly 
erect or inclined outwards, and terminated by a small subglobular reniform anther, which 
