SECTIONS, SUBSECTIONS, AND GROUPS 



Bases of the fascick-bracts non-decurrent A HAPLOXYLON 



Umbo of the cone-scale terminal a Cembka 



Seeds wingless. ' 



Cones indehiscent I Cembrae 



Cones dehiscent II. . . . Flexiles 



Seed with an adnate wing . III. . . Strobi 



Umbo of the cone-scale dorsal b Paracembra 



Seeds wingless IV. . . Cembroides 



Seed-wing short, ineffective V. . . . Gerardianae 



Seed-wing long, effective VI. . . Balfourianae 



Bases of the fascicle-bracts decurrent B DIPLOXYLON 



Fascicle-sheath or seed of Haploxylon c Parapinastkr 



Fascicle-sheath deciduous VII. . . Leiophyllae 



Fascicle-sheath persistent. 



Seed-wing of the Strobi VIII. .Longifoliae 



Seed-wing of the Gerardianae IX. . .Pineae 



Fascicle-sheath persistent, seed-wing articulate, eflFective d Pinaster 



Base of wing-blade thin or slightly thickened. 

 Cones dehiscent at maturity. 



Pits of ray-cells large X. . . . Lariciones 



Pits of ray-cells small ; XI. . . Australes 



Cones serotinous, pits of ray-cells small XII. .Insignes 



Base of wing-blade very thick XIII. Macrocarpae 



