2 68 CAIN, DE OLIVEIRA CASTRO, PIRES, AND DA SILVA 



Table 2. Phanerophytes of. the varzea of Arapari Island, Para, arranged according 

 to the life- form classes of Raunkiaer {Cont.) 



Presence at 6 stations 

 Species I II III IV V VI 



MICROPHANEROPHYTES ; 2-8 m. 



Cacau — Theobroma cacao L. x x x x x x 



Ubim — Geonoma sp.? x - - - - - 



Sororoca — Ravenala guyanesis Petersen x - - - - - 



Seringarana — Elvasia elvasioides (Planch.) Gilg ... x - - - - - 



Pitomba — Gen. sp.? x - - - - - 



Capitiu — Siparuna guianensis Aubl - - x - - - 



Tabernaemontana angiilata Muell. Arg. - - - x - - 



Heisteria sessilis Ducke - - - - - x 



Summary by stations and total for Arapari: 



Megaphanerophytes (42) 



Mesophanerophytes (59) 



Microphanerophytes (8) 



Total (109) 



distance were not controlled and equivalent, 1 to 2 km. of trail were examined 

 in each case. The results are set down in table 2, pages 265 ff. 



Table 2 shows the presence at each station of each species. The arrange- 

 ment of species in the table is first by Raunkiaer's phanerophytic life-form 

 classes, except that the mesophanerophytes are subdivided into two height 

 groups. Within these divisions the species are arranged according to their 

 presence class, from those present at all stations to those encountered at only 

 one station. It should be noted that these lists are complete for the areas 

 examined but that the areas are small. Further search at any one station 

 would certainly have turned up additional species and increased the presence 

 of the species listed. It would also have revealed still more species of low 

 presence. 



On a basis of these data it is seen that on the average any one station 

 list contains about half the species of the combined lists. Fourteen species 

 had a presence of 6/6, five of them megaphanerophytes, eight mesophanero- 

 phytes, and one microphanerophyte. At the other end of the scale, 39 of the 

 109 species were encountered only once, as shown in table 3, page 269. 



As to life form, 42 species were megaphanerophytes, exceeding 30 m. high, 

 59 were mesophanerophytes, from 8 to 30 m. high, and only eight were 

 microphanerophytes, less than 8 m. high. We made no effort to determine 

 the nanophanerophytes or other members of the forest community, such as 



