by Luiz Menini Neto






Work done in association with
Leandro C. S. Assis (doctor's degree in course - USP)
and Rafaela C. Forzza (Botanical Garden of Rio de Janeiro)


Mata do Baú is a private area of semideciduous broadleaved forests, at about 10 hectares, belonging to Barroso municipal district which is located in a region called Campo das Vertentes, in center-south of the state of Minas Gerais (see map).
In the municipal district, it is outstanding the occurrence of semideciduous broadleaved forest, riparian wood and campo-cerrado (field-savannah) which have been suffering constant anthropic interventions related to economical cycles of mining, agriculture, cattle raising and industrialization. Even with an increasing consciousness about the value of the forest resources and the urgency in their conservation, little is known about the floristic composition of the remaining forest of the center-south and east of Minas Gerais.



Foto / Photo: L. Menini Neto
Sacoila lanceolata
We registered 44 species concerning 25 genera, the most part is epiphyte in the interior and/or in the edge of the wood, in areas with variable humidity and luminosity. Just three species occur in the transition of the wood and the cerrado (savannah): Habenaria petalodes, Oncidium ramosum and Sacoila lanceolata, all of them are terrestrial and grow close to the gramineae.
Foto / Photo: L. C. S. Assis
Oncidium ramosum
Foto / Photo: L. C. S. Assis
Pleurothallis riograndensis

The most abundant species observed is, no doubt about, Pleurothallis riograndensis, forming big and gorgeous populations on the trunks of the trees at the edge of the brooks which move along the wood and Rio das Mortes.

Foto / Photo: L. Menini Neto
Pleurothallis riograndensis
Foto / Photo: L. C. S. Assis
Campylocentrum robusto
Another species which occur in great quantity are those from the genus Campylocentrum, covering the trunks of the trees in many places of the wood.
Between the terrestrial, Oeceoclades maculata is the most common, with isolated individuals or small populations on the ground of the wood, standing out by the beautiful variegate leaves between the serrapilheira (poor and creeping undergrowth)
.
On the other hand, some species have been seen just once, in small population or just one individual. The terrestrial were: Galeandra beyrichii, Habenaria macronectar, H. petalodes and Stigmatosema polyaden.
Foto / Photo: L. C. S. Assis
Galeandra beyrichii
Foto / Photo: L. Menini Neto
Stigmatosema polyaden
Between the epiphyte, we have: Capanemia thereziae, Gomesa recurva (this one presenting a big clump in which the entangled of roots shelter an anthill with very aggressive inhabitants), Oncidium ciliatum and O. gardneri.
Foto / Photo: L. C. S. Assis
Capanemia thereziae
Foto / Photo: L. Menini Neto
Pleurothallis riograndensis
Bulbophyllum pabstii
Foto / Photo: L. C. S. Assis
We can call the attention for the two species registered for the first time to the state of Minas Gerais:
Bulbophyllum pabstii
(before just registered for the state of São Paulo and Brasilia) and Pleurothallis riograndensis (before only registered for the states of Rio de Janeiro and Rio Grande do Sul) (Pabst & Dungs, 1975; Sprunger, 1996).
Foto / Photo: L. C. S. Assis
Cattleya loddigesii (habitat)

We should point out the occurrence of Cattleya loddigesii included in the Red List of threatened species in the Flora of Minas Gerais (Mendonça & Lins, 2000), presenting many clumps on the edge of the wood.
Foto / Photo: L. C. S. Assis
Cattleya loddigesii
Nevertheless, the occurrence of the some species of ornamental interest, such as: Comparettia coccinea, Galeandra beyrichii, Oncidium gardneri, Sophronitis cernua, besides Cattleya loddigesii itself (this one specially vulnerable due to fact that the most part of the populations are placed at the edge of the wood) can be menaced of extinction due to pressure of the collecting done by the inhabitants of the surrounding area. In a wider point of view, the other plants are potentially menaced, due to the possible transformation of the habitat in plantation or pasturages, which are already observed in many areas around the wood, reducing it in speckles.
In this way, the continuity of this survey should be an environmental education of the habitants of region regarding the preservation of the Mata do Bau and its jewels, in the order to let them going on embellishing the wood for long time.




cont.

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