RESUMO -(Composição de espécies e uso de plantas em quintais urbanos antigos de Rio Claro, Sudeste do Brasil). Com base no enfoque etnobotânico, este estudo procurou caracterizar os quintais urbanos antigos de Rio Claro, realizando um levantamento da riqueza de espécies vegetais e seus usos, em 17 domicílios selecionados aleatoriamente. Os dados foram coletados por meio de entrevistas semi-estruturadas, estruturadas e coleta de plantas. Encontrou-se um total de 410 espécies, distribuídas em 97 famílias botânicas, constatando-se uma alta diversidade de espécies lenhosas, tanto arbóreas como arbustivas (H' = 1,66 e J = 0,86). Foram levantadas 257 espécies de uso ornamental, 98 alimentares e 93 medicinais. Em vista do grande número de espécies encontradas para as principais categorias de uso, pode-se concluir que os quintais desempenham importantes funções no âmbito local das famílias entrevistadas, contribuindo para a produção de alimentos e de medicamentos para consumo próprio, e também desempenhando uma importante função estética graças à variedade de suas plantas ornamentais. A riqueza desses quintais pode estar relacionada com a origem rural e cultural dos proprietários, que ainda mantêm uma tradição de cultivo. Verifi cou-se que os produtos advindos dos quintais contribuíram para a variação da dieta alimentar dos informantes, representando um potencial promissor para a melhoria da alimentação da população. Palavras-chave: quintais, etnobotânica, diversidade ABSTRACT -(Species composition and plant use in old urban homegardens in Rio Claro, Southeast of Brazil). This study, based on the ethnobotanical approach, looked for to characterize the ancient urban home gardens in Rio Claro, municipality located in the Southeast of Brazil, carrying out a survey of the wealth of vegetal species and their uses, in 17 households selected randomly. The data had been collected by means of semistructured and structured interviews and by the gathering of plants. It was verifi ed a total of 410 species, distributed in 97 botanical families, evidencing a high diversity of ligneous species, such as trees and shrubs (H' = 1,66 and J = 0.86). There were surveyed 257 species for ornamental use, as well as 98 for alimentary and 93 for medicinal uses. Considering the great number of species found for the main categories of use, it can be inferred that the home gardens play important functions for the interviewed families, contributing for the food and medicine production destined for the consumption by the families themselves, and also playing an important esthetic function thanks to the variety of their ornamental plants. The wealth of these home gardens may be related to the rural origin and to the culture of the owners, who still keep a cultivation tradition. It was found that the products obtained from the home gardens contributed for the diet's variety of the informants, representing a promising potential for the improvement of the population alimentation.

RESUMO -(Florística de lianas em um fragmento de floresta estacional semidecidual, Parque Estadual de Vassununga, Santa Rita do Passa Quatro, SP, Brasil). Embora o conhecimento sobre a florística dos fragmentos de florestas estacionais semideciduais tenha crescido nos últimos anos, ainda sabe-se pouco sobre a comunidade de lianas (lenhosas ou herbáceas) nesses fragmentos. Assim, foi realizado o levantamento florístico de lianas na gleba Maravilha, pertencente ao Parque Estadual de Vassununga (Santa Rita do Passa Quatro, SP), a fim de colaborar com o conhecimento dessa comunidade e subsidiar futuros trabalhos que envolvam essa forma de vida. A área de estudo compreende 127,08 ha, com inverno seco e temperatura média anual de 22 °C. Para a coleta do material, percorreu-se mensalmente toda a borda do fragmento e três trilhas no interior da mata, de agosto/2002 a setembro/2003. Foram identificadas 120 espécies de lianas, pertencentes a 30 famílias e 71 gêneros, das quais 51% das espécies são volúveis, 42% apresentam gavinhas e apenas 7% são escandentes. As famílias mais representativas em número de espécies foram: Bignoniaceae (26), Malpighiaceae (14), Sapindaceae (12) e Asteraceae (9). Houve baixa similaridade florística entre as espécies de lianas presentes na gleba Maravilha em relação a outras áreas de florestas estacionais semideciduais do interior paulista. One hundred and twenty species of lianas, belonging to 30 families and 71 genera were identified where 51% of them were twiners, 42% tendrilous and 7% scandents. The most representative families in number of species were: Bignoniaceae (26), Malpighiaceae (14), Sapindaceae (12) and Asteraceae (9). Fragment Maravilha given low similarity with other fragments of semidecidual forest in São Paulo State. Palavras

In the Atlantic Montane Rain Forest of south-eastern Brazil, a field study was carried out to describe the forest disturbance regime, analyse canopy gap composition and evaluate the influence of habitat parameters on gap tree species composition. We characterized canopy gaps considering the group of variables as follows: area, type and number of tree/ branch falls, topographic position, soil coverage and surrounding canopy trees. Gap composition was assessed at species level by measuring all individuals inside gaps higher than one meter. Mean gap area of the 42 canopy gaps analysed was 71.9 ± 9.0 m 2 (mean ± SE). Out of the studied gaps, 35.7% were created by uprooted and by snapped trees, 16.7% by dead-standing trees and 11.9% by the fall of large branches. The disturbance regime was characterized by gap openings predominantly smaller than 150 m 2 and by spatial patterning related to topography. Ridges had smaller gaps and higher proportions of gaps created by branch falls; slopes had bigger gaps generally created by uprooting events. The more abundant and frequent species were shade tolerant and the more species-rich families found inside gaps did not differ from the forest as a whole. Pioneer species were rare and restricted to medium and large size classes. The Indicator Species Analysis and the Canonical Correspondence Analysis indicated gap area, topography and the percentage of soil cover by the genera Calathea and Ctenanthe were the predominant variables correlated with woody species distribution. So, topography emerged as an important issue not only to the gap disturbance regime, but also to gap colonization. In respect to the influence of gap processes on the Atlantic Montane Rain Forest regeneration, our results support the view that canopy gap events may not be working as promoters of community wide floristic shifts.

In the Atlantic Montane Rain Forest of South-eastern Brazil, a