tus pallide viridia, cum petiolis strictis crassioribus suleate 
subtetragonisque, basi latiuscule dilatatis, usque ad 31 
em. longis, 8-10 mm. in diametro; angulis praecipue api- 
cem versus inconspicue alatis; lamina adulta glabra, 
supra atroviridis, subtus pallidior, cordato-ovata, apice 
rotundato-obtusa, leviter marginata, lobis posticis circiter 
10 cm. longis, 2-38 cm. latis, rotundatis, sinu angusto acuto 
sejunctis, nervo centrali robusto recto (siccitate substram- 
ineo) usque ad apicem penetrante, supra leviter sed subtus 
valde elevato, nervis secundaris vel lateralibus arcuatis, 
non confluentibus, e basi nascentibus utrinque tribus cen- 
tralibus similibus, transversis paucis paullo tenuioribus 
conjunctis. Inflorescentia erecta, pedunculo aliquid car- 
nosulo, usque ad 60 cm. longo, 5-8 mm. in diametro. 
Spatha late lanceolata, glaberrima, utrinque flavo-viridis, 
basi cordato-amplexicaulis, apice acuta, usque ad 9 cm. 
longa, inferne 2 cm. lata, vivo non recurva. Spadix erec- 
tus, caudiformis vel cylindricus, apice plusminusve trun- 
catus, apparenter estipitatus, 7-10 cm. longus, atropur- 
pureus. 
Anthurium Idroboanum, belonging to Engler’s sec- 
tion Cardiolonchium, seems to resemble most closely 4. 
magnificum Linden, native of the eastern cordillera of 
Colombia, a species which has been important in hybrid- 
ization for horticultural work in the genus. The former 
may be distinguished from the latter at once by differ- 
ences in the size and venation of the leaves, by having an 
estipitate spadix which is only half as long and by having 
much shorter and more membranaceous, yellowish green 
spathes. he leaf of the newly described species is also 
far more coriaceous than that of Anthurium magnificum, 
and the plant seems to be humbler. 
The base of the leaf of Idrobo & Schultes 957 is far 
more deeply cordate than in the type collection, but all 
other essential characters exhibit an unusual stability in 
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