SECTIONS, SUBSECTIONS, AND GROUPS 



Bases of the fascicle-bracts non-decurrent A — HAPLOXYLON 



Umbo of the cone-scale terminal a — Cembra 



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 — Parapinaster 



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, effective 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 



