570 DR. M. T. MASTERS: GENERAL VIEW 
Division Il. CRASSISQUAMZE. 
Cones subterminal or lateral, falling when mature or per- 
sistent on the branches; cone-seales thick, more or less woody, 
markedly thickened at or near the apex, on one or both sides of 
the terminal umbo. 
A. Leaf-sheaths of thin membranous scales, deciduous 
except at the base. 
Section 38. Inre@riFoute. 
Cones near the apex of the herbaceous shoot. Leaves 1-5, 
entire at the edge; resin-canals marginal; meristele cylin- 
dric, circular in section ; fibro-vascular bundle simple. 
Spp. 14-21. 
Section 4. SERRATIFOLIE. 
Cones near the middle of the herbaceous shoot. Leaves den- 
ticulate at the margin; meristele elliptic in section; resin- 
canals marginal or median .............+.-5+ Spp. 22-25. 
B. Leaf-sheath of persistent convolute scales. 
* Leaves 3-5, 3-sided. 
Section 5. Inp1cz. 
Cones subterminal. Leaves in threes, elongate, slender ; resin- 
canals marginal; anthers crested; meristele triangular or 
elliptic wo... eee cece ee eee eeeeseveaeee .... Spp. 26-28. 
Section 6. PoNDEROSZ. 
Cones mostly large, subterminal or lateral. Leaves mostly in 
threes, elongate ; resin-canals median; meristele elliptic in 
section ; fibro-vascular bundle branched ...... Spp. 29-40. 
Section 7. F1iLiFoLi£. 
Cones mostly large, subterminal. Leaves in fives; resin-canals 
mostly median; meristele elliptic or triangular in section, 
rarely circular ............ ec ee cece ee ceeees Spp. 41-47. 
Section 8. CUBENSES. 
Cones lateral or subterminal. Leaves 2-5; resin-canals internal ; 
meristele triangular or elliptic in section ; fibro-vascular 
bundle simple or branched .........-.+e0005 . Spp. 48-02. 
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