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ARTIGOS PUBLICADOS EM PERIÓDICOS
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P060-99 Reproductive
system and crossing potential in three species of Bulbophyllum
(Orchidaceae) occurring in Brazilian "campo rupestre"
vegetation.
Borba EL, Shepherd
GJ, Semir J*
Experimental self-,
cross- and interspecific pollinations were carried out in
Bulbophyllum weddellii, B. involutum and B.
ipanemense (Orchidaceae). The last two species are closely
related, but B. weddellii is somewhat more distant.
The results agree with current hypothesis that suggest that
interspecific crossing rates reflect phylogenetic proximity.
Examination of pollen tube growth and aborted fruits suggests
that a series of factors may be involved in the high abortion
rate for fruits and large proportion of seeds without embryos.
The low interspecific fertility noted for B. weddellii
and B. involutum is important in the maintenance of
isolation between these species that are sympatric, flower
in the same period and share the same pollinators. Plant,
Systematics and Evolution 217:205-214, 1999. IF= 0.824
*E-mail: semir@unicamp.br
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P061-99 Morfologia
e anatomia da sementes de Schinus terebenthifolius
Raddi (Anacardiaceae)
Carmello-Guerreiro
SM*, Paoli AAS
Schinus terebinthifolius
fruit contains only one seed which is reniform, with a
smooth pale-brown membranaceous seed coat, with a small dark
brown saddle-shaped patch. It is an exalbuminosous seed and
the main reserve foods in the cotyledons are proteins and
lipids. The ovule is anatropous, bitegmic, crassinucellar
with well developed rafe, inserted in an apical-lateral position
in the fruit. The outer tegument is continuous with the base
of the funicle and has been interpreted as a funicular partially
tegumentar obturator. The hypostase is tanniferous and results
from the chalazal and nucelar tissues. The presence of remains
of the funicle fused to the seed-coat is considered as an
vestigial aril. The seed-coat has double origin, a partially
pachychalazal one, that is externally evident, in the mature
seed, as a small dark brown saddle-shaped patch, and a tegumentary
origin, as well. Revista Brasileira de Botânica 22: 91-98,
1999
*E-mail: smcg@unicamp.br
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P062-99 Leaf
ecology of pre-reproductive ontongenetic stages of the palm
tree Euterpe edulis Mart (Arecaceae).
Carvalho RM,
Martins FR, Santos FAM
We studied leaves
of 208 seedlings, infants and juveniles of Euterpe edulis,
randomly selected from plants in 1 ha of swampy forest in
SE Brazil. Each new leaf begins extending after the complete
development of the preceding leaf, in the sequence: emergence,
linear growth while closed, and opening of the segments, followed
by logarithmic growth of the petiole. Average leaf production
rate (2.21 leaf plant-1yr-1) did not
vary among ontogenetic stages, conforming to a plastochronic
rhythm. Average linear growth rate of the closed leaf was
directly related to the average area of the open lamina. Herbivores
included damping-off-inducing suckers, ordinary suckers, chewers,
miners, and multiple attacks, and attacked 33.0% of all leaves
(up to 10% lost area). These attacks varied among stages,
as did leaf mortality rates. Unknown factors were the main
leaf mortality factor. Not losing a leaf while a seedling
and attaining a minimum leaf area in the infant stage are
critical events for survival. Plants gain leaf area by not
losing leaves while a seedling, by producing larger leaves
with greater growth rates, and by accumulating leaves with
longer lifespans. The petiole can simulate an energetically
cheaper branch, delimit a vital space around the stem, favourably
position the leaf lamina and substitute provisionally for
stem growth in height. Annals of Botany 83: 225-233, 1999.
IF= 1.301
E-mail: famartins@correionet.com.br;
fsantos@unicamp.br
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P063-99 The woody
flora of cerrado vegetation in the state of Piauí, northeastern
Brazil
Castro AAJF,
Martins FR*, Fernandes AG
Edinburgh Journal
of Botany 55: 455-472, 1999
*E-mail: famartins@correionet.com.br
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P064-99 How rich
is the flora of Brazilian cerrados?
Castro AAJ, Martins
FR, Tamashiro JY, Shepherd GJ*
An attempt is made
to summarize what is known about the richness of the total
terrestrial angiosperm flora of the "cerrados" (as
a complex of formations) in Brazil, based on published surveys
and species lists. A "refined" list of arboreal
and shrubby species was compiled from a total of 145 individual
lists from 78 localities, taking into account synonymy and
recent taxonomic changes. The refined list had 1709 references
to taxonomic entities at the species level (973 identified
with confidence and 31 with aff. or cf. ), 572
references to generic entities (363 genera identified with
confidence), and 210 references to the family level (88 families
identified with confidence). These data suggest a total of
around 1000 to 2000 arboreal and shrubby species and 2000
to 5000 herbaceous ones, yielding estimates for the total
cerrado flora (terristrial angiosperms) ranging from 3000
to 7000 species. These limits, especially the upper one, are
dubious, but give an idea of the magnitude of the angiosperm
flora in the Brazilian cerrados. Surveys of cerrados are very
unevenly distributed, and studies of relatively unknown sites
may reveal much more diversity than that presently known.
Annals of the Missouri Botanical Garden 86: 192-224, 1999.
IF= 1.897
*E-mail: george@unicamp.br
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P065-99 A new
species of Xylopia L. (Annonaceae) from Bahia, Brazil
Dias MC, Kinoshita
LS*
Xylopia is
a pantropical genus comprising around 160 species. It is one
of the largest genera in the Annonaceae and belongs
to the subfamily Annonoideae, tribe Unoneae and
subtribe Xylopiineae. In the American continent, there
are c. 50 species, the greatest concentration occurring
in South America, especially in the Amazonian region and northwards.
In an account of the extra-Amazonian species of Xylopia
in Brazil, a new species was recognized and is described here
as X. involucrata.Kew Bulletin 53(2): 471-474, 1999
*E-mail: luizakin@unicamp.br
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P066-99 Distinctions
among three Simarouba species
Franceschinelli
EV, Yamamoto K, Shepherd GJ*
Simarouba amara
is frequently confused with two other continental species
of the neotropical genus, S. glauca and S. versicolor.
Cluster and Principal Component Analyses were applied to verify
the distribution and variation of the main diagnostic characters
proposed in early revisions: flower and anther size, stamen
appendage indument, leaflet surface, and venation features.
Overlapping of characteristics in boundary populations of
the three species was found. Geographical and morphological
data other than leaf features also proved to be useful for
species identification.
Systematic Botany 23: 479-488, 1999. IF= 1.763
*E-mail: george@unicamp.br
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P067-99 Simaba
docensis, a new Brazilian species of Simaroubaceae
Franceschinelli
EV, Yamamoto K*
Simaba docensis,
a new species of Simaroubaceae, is described and illustrated.
Its geographical distribution seems to be restricted to semideciduous
forest in the region of the Rio Doce basin, Minas Gerais,
Southeast Brazil. Accordingly, it is likey to be a rare endemic
and endangered species. It belongs to the section Floribundae
Engler. The new species is very closely related to the only
amazonian species of this section, S. paraensis Ducke,
from which it is basically distinguished by the number and
shape of leaflets, leaf indument, and flower and fruit size.Novon
9: 345-348, 1999
*E-mail: kikyo@unicamp.br
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068-99 Two new
Melastomataceae from São Paulo, Brazil
Goldenberg R,
Martins AB*
Meriania sanchezii
and Miconia picinguabensis, two new melastome species
from São Paulo, Brazil, are described and illustrated. Both
occur in the forests on the slopes of Serra do Mar/Serra da
Bocaina, in the eastern part of the state, near the Rio de
Janeiro border. Kew Bulletin 54: 465-470, 1999
*E-mail: amartins@unicamp.br
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P069-99 As Apocynaceae
S. Str. da região de Bauru, São Paulo, Brasil
Koch I, Kinoshita
LS*
As Apocynaceae s.
str. da região de Bauru, São Paulo, Brasil. Este trabalho
consistiu no levantamento das Apocynaceae na Região de Bauru,
centro-oeste do estado de São Paulo, em diferentes tipos de
vegetação. Foram encontradas 25 espécies, distribuídas em
15 gêneros, reprsentadas nesta ordem: Forsteronia G.
Mey., cinco espécies: Aspidosperma Mart., quatro espécies:
Mandevilla Lindl., três espécies: Prestonia
R. Br., duas espécies, e Condylocarpon Desf. Hancornia
Gomez, Himatanthus Willd. ex. Roem. Et Schult.
Macrosiphonia Mull. Arg., Mesechites Mull. Arg.,
Odontadenia Benth., Peltastes Woodson, Rhodocalyx
Mull. Arg. Secondatia A. DC. Tabernaemontana
L. e Temnadenia Miers, uma espécie cada. São apresentadas
chaves de identificação, descrições e ilustrações das espécies,
além de dados de distribuição geográfica, floração e frutificação.Acta
Botanica Brasilica 13: 61-86, 1999
*E-mail: luizakin@unicamp.br
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