130 REVISION OF THE NATURAL ORDER HEDERACE#, 
ig. 4. Ovary cut across. Figs. 5 and 6. Ripe fruit and seed. Fig. 7. Fruit 
cut across. Figs. 8 and 9. Different views of seed ; all, with exception of 
Fig. 5, magnified. 
On THE GENUS DIPANAX. 
Drranax (gen.nov.), Seem. Pedicelli inarticulati. Flores ecalycu- 
lati. Calyx... Petala 5. Stamina 5; anthere ovate. Ovarium 
semisuperum, 2-loculare, loculis l-ovulatis. Stigmata 2, sessilia. 
Drupa exsucca, 2-locularis, 2-sperma. Albumen. . .— uscula 
Hawaiensis, foliis imparipinnatis, junioribus inflorescentiisque furfura- 
ceo-puberulis demum | glabratis ; foliolis brevissime petiolatis 13-15 
coriaceis oblongis v. ovatis integerrimis basi cordatis, umbellis race- 
moso-paniculatis. Species unica : 
1. D. Manni, Seem.— Heplapleurum. dipyrenum, Mann in Proceed- 
ings of the American Academy, vol. vii. p. 168.—Lanai, Hawaiian Is- 
lands (Mann !J. 
The sessile stigmas and inarticulate pedicels distinguish this genus 
from all other known dicarpous Hederacee. The flowers are unknown, 
but on the young ovaries, kindly communicated to me by Mr. Mann, 
the impression made on them by the stamens before anthesis is clearly 
discernible; and from this it appears that there were 5- stamens and 
ovate acute anthers. 
On THE GeNus DIDYMOPANAX. 
Dipymopanax, Dene. et Planch. in Revue Horticole, 1854, p- 109. 
. Linden et Planch. Araliae. p. 1l.— Pedicelli inarticulati. Flores poly- 
gami (masc. et hermaph.), mono- et dioici. Calycis limbus repando-5- 
dentatus. Petala 5, crassiuscula, libera, sestivatione valvata. Sta- 
mina 5, petalis breviora ; anther ovatee, mucronulate. Diseus ex- 
planatus, margine libero undulato. Ovarium 2-loculare, in fl. masc. 
effectum. Styli 2, sepius basi ima, nune longiuscule concreti (divi- 
suris intus 1-sulcis stigmatosis) apud fl. masc. imperfecti, in fructu 
maturo persistentes, indurati, recurvi. Bacca drupacea, 2-pyrena, 
transverse elliptica, didyma, v. orbiculato-ovata ; pyrenis a latere valde 
compressis, margine externo (v. dorso) leviter bicarinatis, latere 
utroque costis tenuibus nerviformibus arcuatis notatis, putamine crus- 
taceo, laeviuseulo v. rugoso. Semina in loculis 1, levia v. rugosa, in- 
tegumento tenui. Albumen :equabile.—Arbores v. frutices Americ® 
tropicze, sericeo- v. velutino-tomentosze, nune glabre ; foliis simplicibus 
„v. sepissime digitatim compositis, foliolis petiolulatis coriaceis integer- 
