flora neotropica - CNCFlora

96 Flora Neotropica
Additional Notes and Descriptions
of Species of Acioa
Distribution of Acioa as a whole is seen in
Figure 153.
8-1. Acioa guianensis Aublet, Hist. pl. Guiane
2: 698, t. 280. 1775.
Acioa remains the most poorly known genus
of neotropical Chrysobalanaceae. Very few col-
lections have been made of this apparently very
rare species.
A recent collection of A. guianensis from the
Municipality of Manicore on the Madeira River
is the first reliable collection from Central Ama-
zonia and confirms the likelihood that seeds col-
lected by Ducke and grown in the Botanical Gar-
den of Rio de Janeiro are really from the Rio
Purus region. All previous collections of this
species had been made in French Guiana and
adjacent Amapa. See Figure 154.
8. Acioa Aublet
Tree 25 m tall, the trunk slightly buttressed to
0.5 m, the young branches glabrous. Leaf lamina
oblong, thickly coriaceous, 7-17 x 4.5-12 cm,
rounded at base, acuminate at apex, the acumen
2-6 mm long, glabrous on both surfaces, with
two glands near to base of lower surface; midrib
prominulous above, prominent beneath; primary
veins 9-11 pairs, prominent on both surfaces;
secondary venation prominent on both
surfaces. Stipules linear, membranous, 5-8 mm
long, glabrous, caducous. Inflorescences muchbranched,
slightly corymbose panicles, 5-10 cm
long, the rachis and branches glabrous. Receptacle
conical and slightly curved near base, 6-7
mm long, glabrous on exterior, the interior lined
by an extremely thick disc with only a small
hollow, the interior with pilose hairs below insertion
of style, glabrous on other side. Calyx
lobes five, rounded, unequal, 3-5 mm long, glabrous
with two glands on exterior, the margins
ciliate, appressed-puberulous on interior. Petals
five, white, caducous, glabrous, the margins cil-
Additional specimen examined. BRAZIL. AMAZONAS: iate. Stamens
Mun. of Manicore: RADAM SB-20-XA, Point
17-20, inserted in two rows around
9,
60?53'W, 6?50'S (fl), C. D. A. Mota s.n. half of the thick staminal
(INPA 61659).
ring, the other half of
the ring with staminodes, with a circle ofdeflexed
8-3. Acioa schultesii Maguire, Brittonia 7: 272. hairs inserted on interior at base of staminal ring,
1951.
the filaments glabrous, the anthers dorsifixed.
Ovary inserted at mouth of receptacle on the
This species was known until recently only from same side as stamens, glabrous on exterior, glathe
type collection from the Rio Dimite in Brazil. brous within, unilocular; ovules two. Style in-
It has now been collected from the region of San serted at base of ovary towards interior, the swol-
Carlos de Rio Negro in Venezuela, where it is len base pilose, the filamentous portion glabrous,
apparently quite common, occurring frequently equalling stamens in length. Fruit ellipsoid, 6-
in the IVIC ecological study sites in the region 7.5 cm long, 4-5 cm broad, exocarp glabrous,
(see Fig. 154). It is a tree 20-40 m tall, flowering lenticellate; mesocarp 12-14 mm thick; endoin
June-August and known locally as pasista. carp thin and bony, fragile, glabrous within, the
cotyledons completely filling the central cavity.
Additional specimens examined. VENEZUELA. Germination
AMAZONAS: 4.3 km NE of San Carlos de Rio
epigeal, first leaves opposite.
Negro,
1?56'N, 67?3'W, 19 Jun 1978 (fl), Clark &
Distribution.
Maquirino
Mainly in the basin of the Rio
6661 (FHO, NY), 20 Jul 1978 (fl), Clark & Maquirino
Purus and the central Solimoes.
6737 (FHO, NY), 3 Aug 1978 (fl), Clark & Maquirino Habitat. Forest on terra firme.
6740 (FHO, NY), 25 Jul 1978 (fl), Clark & Maquirino
6753 (fl) (NY), 25 Aug 1981 (fl), Clark 8211(NY), 5 Additional
km N
specimens examined. BRAZIL.
of Boca de Casiquiare, 1?57'N, 67008'W, 5 Feb AMAZONAS: Coari, 11
1980 (fr), Liesner & Clark 9107
May 1974 (fr), CampbellP21130
(MO, NY).
(INPA, NY); 10 Feb 1975 (fl), Ramos P23251 (FHO,
INPA, MG, NY); Lago de Tefe, 9 May 1974 (st),
8-4. Acioa edulis Prance, Acta Amaz6nica
Campbell P21129 (INPA, NY), 20 Nov 1959 (fr), Ro-
2(1):
drigues & L. Coelho 1408 (INPA); Rio Ituxi, Boca do
12-16. 1971. Couepia edulis (Prance) Prance, Remanzinho, 1933 (fl bud), Krukoff5822A (NY); Ma-
Acta Amazonica 5: 143. 1975.
nua, Lago de Tefe, 13 Jul 1973 (fr), Lleras et al. P16655