388 MR. J. MIERS ON THE HIPPOCRATEACEA OF SOUTH AMERICA. * des 
10. TowrELEA HOOKERIANA, nob.; Hippocratea acapulcensis, Hook. (non H., B., K.), 
Bot. Beech. Voy. 280: scandens, ramulis strictis, tenuibus, patentim divaricatis, 
subcompressis, lenticellis pallidis crebre verruculosis, axillis remotis dilatatis : foliis 
subparvis, longe cuneatis, elongato-oblongis, apice rotundatis et emarginatis, cre- 
nato-serrulatis, glaberrimis, submembranaceis, utrinque subpallidis, nervis tenu- 
ibus venisque reticulatis utrinque prominulis, opacis, sub lente minutissime gra- 
nulatis; petiolo tenui, supra sulcato, subtus corrugulato, limbo 6-8-plo breviore: 
panieulis axillaribus, folio subæquilongis, glaberrimis, dichotome pluridivisis, pedun- 
culo ramulisque tenuissimis, subcompressis, minute granulosis ; bracteolis oppositis, 
parvis, membranaceis, denticulatis; floribus minimis, pedicellatis, in ultimis ramulis 
intra bracteolas fere absconditis; sepalis parvis, rotundatis, submembranaceis, mar- 
gine erosulis; petalis triplo longioribus, obovatis, pallide luteis, membranaceis, 
erosule denticulatis ; disco breviter tubulari, submembranaceo, subplicato, margine 
crenulato; staminibus reflexis; stylo brevi; stigmatibus 3, brevissimis, obtusulis, 
divaricatis. In Mexico: v.s. in herb. Hook., Acapulco (Barclay, sub Hippocratea 
acapulcensis). 
A very slender seandent plant, very different from the Hippocratea acapulcensis of 
Kunth, and also from Pristimera tenella, designated by the same name in the Hookerian 
herbarium. Its very slender branchlets divaricate oppositely at right angles, the axils 
being 13-23 in. apart; the leaves are 11-14 in. long, 6-8 lines broad, on a petiole 24 
lines long; the panicle is 1? in. long, five times dichotomously divided, the peduncle 
being 7-12 lines long, the primary branches 3 lines, the rest diminishing gradually up- 
wards, the ultimate pairs being short enough to form an involucral whorl of membra- 
naceous bracteoles surrounding the minute flowers; the flower in bud is about 4 line 
broad, but when expanded is about 13 line in diameter; the height of the disk is 1 the 
length of the sepals. 
9. RADDIA. 
This genus was established in 1821, by Frey Leandro do Sacramento, Director of the 
Botanic Garden of Rio de Janeiro, under the name of Raddisia, in honour of Prof. 
Raddi, an Italian botanist and traveller in Brazil,—a name which De Candolle, in 1824, 
properly suggested should be abbreviated to the more appropriate title of Zaddia*. 
The typical plant is the only species yet recorded, its characters being known only from 
the imperfect description given by Leandro, in which the fruit is erroneously stated to be 
a trilocular capsule. Since De Candolle's time the genus remained in oblivion until 1862, 
and was then mentioned only to be absorbed with some others into Salacia +. It forms, 
however, a very good genus, readily distinguished by well-marked characters. Many of 
the species here enumerated have been erroneously referred by botanists to Hippocratea, 
Tonsella, Anthodon, and Salacia; they are mostly small trees, with slender and sub- 
scandent branches, having opposite oblong leaves upon short petioles. Their inflorescence 
often consists of a few single flowers, each upon a rather long slender pedicel, all fasci- 
culated in each axil upon a gemmiform nodule clothed with many small imbricated 
* DC. Prodr. i. + Benth. & Hook. Gen. Pl. i. 370. 
