Cecropiaceae: Coussapoa and Pourouma, with an ... - CNCFlora

Pourouma 155
long, yellow-velutinous, with long, brown, pluri- mostly also on the smaller veins, occasionally
cellular hairs; stigma peltate, ca. 1.5 mm diam., also on the leaf margin; lateral veins (6-)10-25
yellow-puberulous. Fruiting perianth ovoid to al- (-30) pairs, basal pair branched or sometimes (in
most ellipsoid, 1.1-1.5 x 0.7-0.9 cm long, pu- obovate to elliptic leaves) unbranched, the basal
berulous.
part of these veins forming the basal part of the
Distribution (Fig. 85). Peru (Loreto) and Brazil leaf margin (thus not separated from the margin
(Amazonas, along Rio Javari); in non-inundated by mesophyll), reticulum and tertiary venation
forest.
(rather) plane beneath; petiole 3-22(-35) cm long,
sparsely to densely white-puberulous (to -subve-
Specimens examined. PERU. LORETO: Rio Nanay,
Casario de Mishana 3 Dec 1976 (9), Davidson 5203 lutinous) to yellow-hirsute, occasionally also with
(MO, U, US), 4 Dec 1976 (9), Rimachi 2725 (DUKE, long white, arachnoid hairs; stipules 3-16 cm long,
F, NY); Iquitos, 3 Dec 1976 (9), Tessmann 5364 (B, outside yellow(ish)-(sub)velutinous to -hirsute to
S, US, type collection of P. phaeotricha). -(sub)sericeous, inside glabrous or sometimes
BRAZIL. AMAZONAS: Rio Javari, Estirao do Ecuador,
8 Aug 1973 (8), Lleras et al. P.17242 (F, INPA,
sparsely hairy, caducous. Staminate inflores-
MO, NY, U, US), 21 Oct 1976 (v), Prance et al. 23966 cences up to 10 cm long and 5 cm wide; peduncle
(G, INPA, NY, U).
2-6 cm long, peduncle and branches whitish- to
yellow-puberulous
Vernacular names. Peru. Loreto: Sacha
(to -subvelutionous) to -hiruvilla,
tellous;flowers sessile or pedicellate, most of them
uvilla.
in
The features of the staminate inflorescences
globose heads, these 3-4 mm diam.; tepals
0.5-1 mm
and flowers and the pistillate flowers suggest close
long, connate, forming a ? urceolate
perianth,
relationships to P. heterophylla and P.
hairy; filaments longer than the periformicaanth,
free. Pistillate
rum. However, P. phaeotricha lacks the swollen
inflorescences in fruit up to
18 cm
petiole base.
long and 10 cm wide; peduncle 3-12 cm
The two collections from the
long, peduncle and branches with indument sim-
Brazilian bank
ilar to that of the staminate
of Rio Javari have leaves with a scabrous
inflorescence;flowers
upper
surface in
10-30, in two clusters or more
contrast to the other collections.
diffusely distributed
in the inflorescence; pedicel up to 1 cm, in
fruit
10. Pourouma mollis Trecul, Ann. Sci. Nat.
up to 1.5 cm long, often already at anthesis
Bot., with a
Ser. 3, 8: 102, 1847; Miquel in Martius, Fl.
strongly (+ capula-like) widened apex;
bras. 4(1): 127. 1853; Berg, Fl. Suriname
perianth 0.5-1 cm long, yellow(ish)-(sub)ve-
5(1):
272, t. 15b. 1975. Type. French Guiana.
lutinous,
Withapex
? tuberculate; stigma peltate, ca.
2 mm
out locality, without date (2), Leprieur s.n.
diam., white-puberulous. Fruiting peri-
(lec- anth black or
totype, P. chosen by Berg, Fl. Suriname
purplish, ovoid to ellipsoid or to
5(1):
272.
oblongoid, 1-2 x 0.7-1.5 cm, usually
1975;
densely
isolectotype, G).
hairy.
This species is very closely related to P. melinonii.
We had considered recognizing the two
taxa only at the subspecific level, but the lack of
intermediates in areas where the two taxa grow
together indicates that they are probably good
species.
Two allopatric subspecies can be recognized.
Tree, up to 30 m tall. Leafy twigs 4-10 mm
thick, rather sparsely to densely white-puberu-
lous (to -subvelutinous) to yellow-hirsute, and
with sparse to dense, purple to reddish-brown,
pluricellular hairs, occasionally sparse, white,
arachnoid hairs. Lamina entire, ovate to elliptic
(or obovate), 6-25(-35) x 4-20(-30) cm or 3-5-
lobed to -parted, ca. 10-25(-40) x 10-25(-40)
cm, coriaceous (to subcoriaceous), apex acumi-
nate, base acute, rounded to truncate, or sub-
cordate; upper surface smooth, sometimes sca-
brous, hairy on the main veins or subglabrous,
occasionally yellow-hirsute, lower surface,
sparsely to densely puberulous to hirtellous to
subtomentose, often part of the hairs on the main
veins appressed, arachnoid hairs in the areoles,
Key to the Subspecies of
Pourouma mollis
1. Lamina usually entire; pistillate inflorescences
with the flowers in two, more or less distinct
clusters; Guianas, Lower Amazon Basin, and
eastern Brazil. ................ a. subsp. mollis.
1. Lamina usually 3-5 parted; pistillate inflorescences
usually with the flowers diffusely distrib-