Piate 2733. 
LEUCONOTIS ELASTICA, Becc, 
A POCYNACER. 
L. a Becc. Nelle Foreste di Borneo, pp. 358, 562, 563, fig. 59 ; 
ab omnibus speciebus hucusque descriptis foliis amplis ellipticis vel 
late Bligdon- oblate abrupte cuspidato- acuminatis, nervis utrinque 
-3 patulis subtus eximie conspicuis et sub margine arcuato-connexis 
distincta 
- niores crassi, glaberrimi, exaistando nigrescentes, magis 
rnicosi, internodiis 2-3 poll. longis. Folia elliptica vel 
late elliptico oblonga, utrin rotundata, api brupte cuspidato- 
acuminata, 5- . longa, 71-3 ll. lata, erasse coriacea, glaberrima, 
in alabastra vernice induta, supra exsiccando entia vel nigres- 
centia, lucida, subtus magis ™m nusve glauca, costa et nervis lateralibus 
utrinque 2 margine arcuato connexis supra immersis subtus 
prominulis eximie conspicuis ; petioli robusti, 1 poll. longi, paris 
cujusque linea transversa elevata co Inflorescenti ni- 
culate, ohn ae multo rapabegres minute pu le, demum 
intus eglandulosis. Corolla flava ; tubus ad 5 lin. longus, e basi latiore 
cylindricus, glaber ; lobi rotundato-ovati, 2 lin. longi. Anthere supra 
5 
ium insert, os attingentes, 1} lin. longe. Ovariwm gla- 
rum, 2-loculare, loculis pauciovulatis. Fructus ovoideo-globosus, 
baccatus, dense verrucosus, 14~2 poll. longus. Semina (haud plane 
moe circiter 4, rt ad 6 lin. longa ; cotyledones foliacee basi 
ata ; radicula ‘bre 
Borneo: Sarawak, Bintulu, Beccari, 899, 2291; near Kuching, 
Haviland, 3063. 
Beccari, 3708 (/.c. p. 562), also from Sarawak, comes very near 
L. ela stica ; ut its leaves taper more gradually towards the acumen, 
and hav or 5 nerves on each side. he internodes of the leat- 
m . 
L. elastica is, according to Beccari, an excellent rubber plant.—Orro 
STAPF. 
Pi ig. 1, a flower-bud; 2, the — in longitudinal section; 3, an anther; 4, pistil ; 
5, cross-section of ovary. Al/ enlarged. 
SERIES IV. VOL. VIII, PART II. G 
