Mise en defens Parcours Libre Type biologique FA FR (%) FA FR (%) Phanerophytes
(Ph) 3 4,23 1 3,57 Chamephytes (Ch) 19 26,8 8 28,6 Hemicryptophytes (He) 14 19,7 7 25 Therophytes (Th) 32 45,1 11 39,3 Geophytes (Ge) 3 4,23 1 3,57 Total 71 100 28 100 Spectre biologique Th>Ch>He>Ph=Ge Th>Ch>He>Ph=Ge Tableau 6.
Chi-Square tests indicated significant differences in the percentages of chamaephytes, therophytes and phanerophytes
species between the caatinga and the cerrado, and between the caatinga and the cerrado-caatinga transition areas.
Geographic area Sites Species Medicinal species Eastern area 48 76 44 Western area 30 65 33 Middle area 1 10 1 Total 79 151 78 Table 6: Number of species in each life form for all species collected during the collection missions of Mediterranean coast of Libya during the spring and summer of 2009 and 2010 Life form Number of species % Trees 24 16 Phanerophyte
(shrubs) 55 36 Chamaephyte (semi-shrubs) 11 7 Annual shrubs 4 3 Perennial forbs 24 16 Perennial grasses 17 11 Biennial forbs 2 1 Therophyte (annual forbs) 11 8 Climbers 3 2 Total 151 100 Table 7.
In his classification, there are five major classes, arranged according to increased protection of the regeneration buds: phanerophytes
, chamaephytes, hemicryptophytes, cryptophytes, and therophytes.
However, the phanerophytes
constituted the lowest contribution.
A high proportion of phanerophytes
and chamaephytes, close to 30 and 15%, respectively, were also registered.
Percent of area Number of area Life form 61 82 Therophytes 22 31 Hemicryptophytes 6 8 Helophytes 4 5 Geophytes 2 3 Phanerophytes
According to our findings, having some elements such as cryptophytes and phanerophytes
abundantly and in high percentage reveals the characteristics of temperate forests.
On the other hand, life form spectrum of grasses showed that therophyte was the dominant one followed by hemi-cryptophytes and phanerophytes
The most frequent biological types in deserts and subdeserts (therophytes, many geophytes, hemicryptophytes, and some chamaephytes) are species with passive strategies; only chamaephytes and phanerophytes
have to adopt active strategies to deal with the arid climate.
The four forest types were dominated by phanerophytes
, including lianas, epiphanerophytes and stem-succulent phanerophytes
Like equatorial lowland forests, these forests have phanerophytes
and tree species with mesophyllous leaves contributing the greatest number of species to the forests' lifeform and leaf size spectra (Zhu et al.