320 CAIN, DE OLIVEIRA CASTRO, PIRES, AND DA SILVA 



Table 24. Composition and structure of the natural forest of the Horto Botanico 

 do Instituto Agronomico do Sid, Pelotas, Rio Grande do Sul. Species are arrajiged 

 by strata, life-form,^ and leaf-size classes}* with a distinction between those more 

 and those less important. Basic data by Dr. Jose da Costa Sacco, with the assistance 



of the authors {Cont.) 



More important species 

 Acanthosyris spinescens (Mart. & Eichl.) Griseb. Santala- 



ceae 



Vitex montevidensis Cham. Verbenaceae 



Actinostemon caribaeus Griseb. Euphorbiaceae 



Cupania vernalis Cambess. Sapindaceae 



Lithraea brasiliensis March. Anacardiaceae 



Less important species 



Solanum swartzianum Roem. & Schult. Solanaceae 



Myrsine ferruginea Spreng. Myrsinaceae 



Trema micrantha (L.) Blume Ulmaceae 



Campomanesia aurea Berg. Myrtaceae 



Chuquiraga spinescens Baker Compositae 



Fagara rhoifolia (Lam.) Engl. Rutaceae 



lodina rhombifolia Hook. & Arn. Santalaceae 



Sebastiana klotzchiana Muell. Arg. Euphorbiaceae 



C. Low tree and high shrub stratum: 3-5 m. Total coverage 

 40% 



More important species 



Myrcianthes gigantea Legrand. Myrtaceae 



Basanacantha spi^wsa (Jacq.) K. Sch. Rubiaceae 



Erythrina crista-galli L. Leguminosae 



Celtis spinosa Spreng. Ulmaceae 



Casearia silvestris Sw. Flacourtiaceae 



Sambucus australis Cham. & Schlecht. Caprifoliaceae ... 



Schinus polygamus (Cav.) Cabrera Anacardiaceae 



Eugenia uniflora L. Myrtaceae 



Fagara hiemalis (St. Hil.) Engl. Rutaceae 



Cereus peruvianus (L.) Mill. Cactaceae 



Less important species 



Scutia buxifolia Reiss. Rhamnaceae 



Styrax leprosum Hook. & Arn. Styracaceae 



Berberis laurimi Thunb. Berberidaceae 



Dodonaea viscosa Jacq. Sapindaceae 



Cestrum parqui L'Herit. Solanaceae 



Myrrhinium rubifiorum Berg. Myrtaceae 



