Lozania nunkui (Lacistemataceae), a New Species from the Sandstone Plateaus of the Cordillera del Cóndor in Ecuador and Peru

2012·4.5 MB·English

by  David A Neill

New
Lozania nunkui (Lacistemataceae), a Species from the Sandstone
Condor Ecuador and Peru
Plateaus of the Cordillera del in
and Mercedes Asanza
David, A. Neill
km
Universidad Amazonica, Facultad de Ingeniena Ambiental, 2 a Napo, Puyo,
Estatal V2 via
[email protected]
Pastaza, Ecuador, [email protected];
Abstract. Lozania nunkui D. A. Nei
(Lacistemataceae), a new species from the Cordillera various genera and families (Neill, 2005; Daly et al.,
del Condor region of southeastern Ecuador and 2012). Most of these undescribed taxa are evidently
adjacent northern Peru, is described and illustrated. restricted to the outcrops of Cretaceous sandstone of
20%
distinguished from other species in the genus by the Hollrn Formation, which constitute about of
It is
the glabrous, entire, relatively thick and coriaceous, the land area in the Cordillera del Condor region.
Some
sclerophyllous leaves, and uniquely, by the five or of these substrate-restricted species exhibit
morphological features that appear to reflect an
known The new
other species. species restricted ecological adaptation to the highly acidic, nutrient-
all is
to nutrient-poor, highly acidic sandstone plateaus poor soils that are derived from the sandstone
within range, and the thick sclerophyllous leaves substrate, frequently including glabrous, thick,
its
Among
appear to be an ecological adaptation to that edaphic coriaceous or sclerophyllous leaves. these
endemics on
condition. novelties that are evidently local the
sandstone plateaus of the Cordillera del Condor, a
is
Resumen. Se describe se ilustra Lozania nunkui
y species of Lozania that we and our colleagues have
&
D. A. Neill Asanza (Lacistemataceae), una nueva
found on several sandstone outcrops in the region.
especie de la region de la Cordillera del Condor en el
&
sureste del Ecuador la zona colindante del norte de Lozania nunkui D. A. Neill Asanza, sp. nov.
y
TYPE:
Peru. Ecuador. Morona-Santiago: Limon-In-
!
por las hojas glabras, enteras, relativamente gruesas, danza, Cordillera del Condor, Centro Shuar
coriaceas esclerofilas, por los cinco u ocasional- Kuankus, summit of Cerro Chuank Naint
y y
mente seis sepalos, en vez de los cuatro sepalos que (“Vulture Mountain” in Shuar), a sandstone
presentan todas las demas especies. Dentro de su massif, 1270 m, 3°3'36"S, 78°14'25"W, 18
rango geografico, la especie nueva esta restringida a Sep. 2005 D. Neill, M. Asanza, W.
(fl., fr.),
&
14657 QCNE;
Quizhpe Morales (holotype,
C.
muy AAU, GB, HUT, LOJA, MO, NY,
nutrientes acidos, las hojas gruesas isotypes, K,
y y y
esclerofilas parecen ser una adaptation ecologica a US).
esa condition edafica.
m
cm
Lozania Mutis ex Caldas Tree attaining 10 in height with trunk 10
ca.
I
small Neotropical genus of just four accepted species diam.; branches glabrous, mostly borne horizontally.
at present (Sleumer, 1980; Gentry, 1988), with a Leaves elliptic to elliptic-obovate, broadly obtuse to
America
distribution including southern Central
(southeast Nicaragua to Panama), the tropical Andes ceous, rather thick, and sclerophyllous, com-
stiff
(Venezuela to Bolivia), and western Amazonia, pletely glabrous above and below, or glabrescent with
including Amazonas, Brazil. All known species are a few scattered simple unicellular hairs on the lower
small trees, sometimes shrubby, occurring in the surface, with entire margins, the blade (4-)5-10(— 11)
X
understory of mature-phase moist and wet forests up (2.5-)3-5 cm, petiole 7-9 mm, glabrous or with a
m
2400
to ca. elevation. few strigose hairs; leaf surface lustrous, conspicu-
Condor on upper somewhat
In the Cordillera del region of southeastern ously glossy surface, duller
Ecuador and northern Peru, inventory work beneath, costa impressed above, prominent below;
floristic
in recent years has resulted in collections of a lateral nerves 4 to curved ascending, secondary
7,
10.3417/2009021 Novon 22: 207-211. Published on 30 November 2012.
doi:
208 Novon