8 ; TRANS. S1. LOUIS ACAD. SCIENCE. [168 
nite number of bracts, which assume the functions of a calyx and 
have been sometimes designated as such. Linnzus, in his Syst. 
Nat. ed. 1, speaks of a calyx 4-phyllus. Their number varies in 
the different species from 3 to 15 or 16, but is fairly constant in 
the same species. The two exterior lateral bracts are strongly 
keeled, like those of the sheath of the leaves, and stouter and. 
mostly shorter than the others; the third is placed on the upper 
side, towards the axis of the inflorescence ; the fourth on the lower 
or dorsal side, opposite the supporting bract, and so forth. The 
innermost ones not rarely exhibit a transition to the anthers, 
bearing small or incomplete anther cells on the lower part of their 
back. In P. resimosa and Canariensis 1 find the involucral 
bracts articulated in the middle. - 
A table exhibiting the numerical proportion of involucral bracts 
in the different species, the male flowers of which I could exam- 
ine, may not be without value. 
3 or 4 involucral bracts I find in P. sylvestris and Pinaster; 
3 to 6 in P. densifiora; 
4in P. Palosriond, Canariensis, and Greggit; 
4to5in P. edulis and Parryana; 
4to6in P. Pinea ane PP. hed oleserion’ 
6 in P. letophylia, Liste: and contorta; 
6 to 7 in P. fos 9 om montana, and Masso 
6to8in P. Strobus. excelsa, aoe Sua pirie tuberculata, 
muricata, aa Banksia 
8 to 10 in P. monticola aes oe Chihuahuana, pees te 
Laricio var. Pyrenaica, and Austriaca, Coulteri, inops; 
i eda; 
g to 12 in P. eetgricnnd and wd 
10 in P. insi, 
tt7; 
12 to14in P. Khasta, glabra. and australis; 
14 to 16 in P. Lambertiana and Cubensis. 
The ANTHERS consist of two parallel extrorse cells, which 
open longitudinally on their back; their connective, heretofore 
often called a bract, spreads out into a transverse semi-orbicular 
or almost orbicular, entire or denticulate (in most species of Pin- 
