Syngonium oduberi Ray,
Aroideana 3:128. 1980. TYPE: Costa Rica, Osa Peninsula,
Corcovado National Park, Ray 4 (GH, holotype).
plants with trailing stems; internodes 4-7 mm long, 3 mm wide; leaves
much like those of the adult but smaller and narrower; petioles
4.5-5.5 cm long; blades 13-15 cm long, 3.5-4.5 cm wide. Adult plants
with stems closely appressed to trees; internodes 1-2 cm long, ca.
6 mm wide; petioles 6-10 cm long, sheathed throughout except for
the apical 0.5-1 cm, the sheath free-ending and apiculate at the
apex, not extending beyond the base of the blade, the apical part
flattened adaxially with a medial rib, the margins acute; blades
simple, oblong-elliptic, gradually acuminate at the apex, slightly
constricted above the posterior lobes (less so on juvenile blades),
14-23 cm long, 6-8 cm wide, the posterior lobes bluntly acute, 8-13
mm long; primary lateral veins 12-14 on each side, sunken above,
raised beneath; tertiary veins prominent; latex not milky though
slightly orange in mature stems. Infructescences pendent; peduncles
3.5 cm long; fruiting spadix 4 cm long, 2.5 cm diam. The flowering
spadix has not been seen; a nearly mature fruit was collected in
July. Figs. 13-14.
Syngonium oduberi has been collected only once, in
wet forest, at ca. 100 m elevation.
species is distinguished by its oblong-elliptic leaves and almost
fully sheathed petioles. It is most closely related to S.
llanoense from the isthmus of Panama. It is distinguished
from that species in having smaller leaves and stems, in having
the posterior lobes bluntly acute (versus rounded in S. llanoense)
and in having the sheath end well below the blade. In S. llanoense
the sheath generally extends beyond the base of the blade.
Rica: PUNTARENAS: Parque Corcovado, Osa Peninsula, near Llorana,
100 m, Ray 4 (GH).