Table Of Content—
Unn
Conti Michigan Herb 24:21 -23
PTERANDRA
VIRIDIFLORA (MALPIGHIACEAE),
NEW
A FROM
BRAZIL
SPECIES
Anderson
Christiane
Michigan Herbarium
University of
Ann
3600 Varsity Drive, Arbor, Michigan 48108-2287
Pterandra Adr. Juss. a genus of trees and shrubs of Central and South America
is
named
(Fig. which for winged anthers (Fig. 2e). readily recognized by
1), is its It is its
and The and
stipules inflorescences. intra- epipetiolar stipules are entirely to partly
connate, forming two broadly triangular structures that act as valvate bud scales.
The
inflorescences consist of 2-6-flowered fascicles borne in the axils of bracts or
leaves that are crowded at branch apices. The peduncles are absent, and each pedicel
subtended by and two The pubescent and
a bract bracteoles. petals are abaxially
is
my
monograph (Anderson
persistent in fruit. In of Pterandra 1997), I recognized
add
14 species; to these the novelty here described.
I
C. Anderson, nov. Type: Brazil. Minas Gerais: Berilo,
sp.
UHE-Irape, Tameirao Neto 3204 MICH!).
E. (holotype: Fig.
2.
cm cm
Frutex. Laminae 6-8.5 longae, 2.5^1.1 latae, obovatae vel ellipticae, supra
cm
glabrae praeter costam dense sericeam, subtus tomentulosae; 0.4-1
petioli longi,
mm
3-4
dense aureo-sericei; stipulae (2.5-) longae lataeque, connatae, adaxialiter
hirsutae, abaxialiter aureo-sericeae. Inflorescentia ex fasciculis sessilibus et axil-
cm
laribus constans, floribus cujusque fasciculi 2-\\ pedicelli 2.1-2.7 longi, 0.5-0.6
mm
diametro, dense aureo-sericei. Petala pallide viridia, limbo late elliptico vel late
mm mm
obovato vel suborbiculari; limbi petalorum lateralium 5-5.5 longi, 3-3.3
mm mm
limbus 4
obovati, petali postici ca. 5.5 longus, ca. latus, suborbicularis.
lati,
mm mm
Filamenta praeter caespitem basalem glabra. Styli ca. 4.5 longi. Cocci ca. 3.5
diametroque, hirsutulo-tomentosi.
alti
Shrub; young branchlets densely golden-sericeous, older ones glabrous. Laminas
cm cm
6-8.5 long, 2.5-4.1 wide, obovate to apex obtuse-mucronate or some-
elliptical,
when
young
times emarginate, base cuneate, adaxially tomentulose but glabrate to
glabrous at maturity except for the pubescent costa, abaxially sericeous or sparsely
mm
on composed medi-
so but densely so the costa, the vesture of hairs 0.2-0.7 long,
more or appressed, mostly white or sometimes golden, and
fixed, terete, straight, less
mm
with scattered longer and thicker hairs, ca. 0.8-1.2 long, subsessile or with a stalk
mm
up to 0.05 long, translucent dots present on abaxial surface, costa and second-
prominent
ary veins abaxially, tertiary veins usually slightly raised as well; petioles
mm
cm
3-4 and
0.4-1 long, densely golden-sericeous; stipules (2.5-) long wide,
connate, adaxially hirsute, abaxially sericeous. Inflorescence of sessile, 2^1-flowered
cm
fascicles, each fascicle borne in the axil of a leaf; pedicels 2.1-2.7 long, 0.5-0.6
mm mm mm
in diameter, densely golden-sericeous; bracts 2-2.2 long, 0.8-1 wide,
volume
hiriiarium
.rNivi-.usrrYni-MiriiuiAN
2
triangul hra< ng, ca. nd adcoles
ir.
,, I'
i , I i . ,
mm
apex
with the acute, abaxia] n-sericeous. Sepals ca. 2.5 long, ca.
i
mm mm
2 wide, triangular (the distal 2/3 ligulate), recurved, glands ca. 2 long, ca. 0.8
mm
wide. Petals light green, margin erose. abaxially densely pubescent on claw and
mm mm mm
center of limb; lateral petals: claw 1.5-1.7 long, limb 5-5.5 long. 3-3.3
mm mm
o o claw limb
petal: ca long, ca. 5.5 long, ca.
il i. I
i i I I » t
j
mm
4 wide, the limb suborbicular. Filaments glabrous except basal of
for a tuft hairs,
mm
those of stamens opposing sepals ca. 2.5 long, those of stamens opposing petals
mm mm mm
ca. 3 long; anthers ca. long, wing of outer locules 0.2 wide. Styles ca.
1
mm mm
4.5 long, ca. 0.3 in diameter, with scattered hairs adaxially in the proximal
mm
mm
1/4. Cocci ca. 3.5 high and in diameter, hirsutulose-tomentulose; torus ca.
1
igh a mi' seed not seen.
ii
i.
known
Ptcrandra viridifiora only from the type. distinctive in green pet-
is It is its
als and the placeim mllorescenci In mosl specie fascicles are borne
lie
i < • I I • 1 -
1
on a leafless node of a short shoot, often below a Hush of new leaves, and subtended
by a bract compos, d of lh> mules and a rudimentary leaf; in flavescens and
P. P.
i
new
sericea (occasional aie placed in the axil of a leaf. In P. viridifiora
I.
i
the fascicles are borne in the axils of well-developed leaves of a young shoot.
Because most species ol 'Ptcrandra are known from le colli ions, their ranges
An
known common
showy
are not well (Fig. exception the pyroidea, which
). is P. is
1
lluu
MinasGerais,
in the Distrito Federal, an similar hatsch-
hi y P.
bachii was found to the west Mato Grosso. Both species are low shrublets and have
in
large pink petals rand, -a vir'uiitiora oi col led ei in <i n mas Gerais, but in
'
I
aspects resembles more the northern species, wh hrubs to trees and
all
lai
-
i
ill
m
FIG. Pterandni
2. Dclaii slunvii iseilioi n Mi
i > f;i
I I \ I
m. in i- nole die heart shaped inlr; ml epincliolar stipuli Ueral petal, abaxial vie\v d
'i I"
(
m
Posterior petal Hag"), abaxial view tamen del
laxia ind ide views.
n
(
I i I
mm; mm; mm; mm.
c, d, 4 e, 2 2.7 (Based on Tameirao Nero 3204.)
f,
have cream Green
smaller petals, white to (yellow in age). petals are otherwise un-
known
in the genus, although -Niiown only from the type, was reported
•
.
on have The
the label to greenish white petals. label data for P. viridiflora did not
on
include notes stature, only that shrub.
it is
ACKNOWLEDGMENTS
William R.Andersc
of Pterandra
viridiflora.
LITERATURE
CITED
f/V/Y//?f/ra(MalpiL',hiac( le) onti Univ. Michigan Herb. 21: 1-27.
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