| Page | Plate | | PART 1 CHARACTERS OF THE GENUS | 1 | | | Cotyledon, Primary Leaf, Bud and Branchlet | 1, 2 | I | | Secondary Leaves | 2 | II | | External Characters | 4 | | | Internal Characters | 4 | | | Flowers and Conelet | 7 | III | | Cone | 8 | IV | | Phyllotaxis | 12 | V | | Cone-tissues and Seeds | 12-16 | VI | | Wood | 17 | VII | | Bark | 18 | | | PART 2 CLASSIFICATION OF THE SPECIES | 22 | | | Sections, subsections and groups | 25 | | | Section Haploxylon | 26 | | | Subsection Cembra | 26 | | | Group Cembrae | 26 | | | Pinus Koraiensis, Cembra, Albicaulis | 26,27 | VIII | | Group Flexiles | 28 | | | Pinus Flexilis, Armandi | 28, 30 | IX | | Group Strobi | 30 | | | Pinus Ayacahuite, Lambertiana | 30, 32 | X | | Parviflora, Peuce, Excelsa | 32, 34 | XI | | Monticola, Strobus | 34, 36 | XII | | Subsection Paracembra | 36 | | | Group Cembroides | 38 | | | Pinus Cembroides, Pinceana, Nelsonii | 38, | |
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