286 BOTANICAL GAZETTE [OCTOBER 
divide, giving rise to a semicircle of bundles with xylem on the 
concave side, facing the xylem of the bract bundle. The semicircle 
ae 050 24 4..%e° 2 
—Pinus maritima: figs. 3-9, course of bundles to bract and scale in 
upper half of sci fig. 3, origin of bract bundle (6) and scale bundles (4 remaining) 
in strobilus cylinder; fig. 4, two upper bundles uniting; figs. 5-9, transverse sections 
of stp as ‘each ‘penile remaining undivided, scale bundles giving rise to several 
undles; figs. 10-12 and figs. 13-15, from lower half of strobilus, scale bundles decreas- 
ing in ‘einen and originating nearer to bract bundle as base of cone is approached: 
figs. 16-20, from lowest sporophylls, bract and scale bundles (bs) one in origin; fig. 
21, transverse section of one of lowest sporophylls; x 
S. 22-29.—Pinus Banksiana: figs. 22-24, from middle of cone, bundles closing 
up to form paige’ cylinder; figs. 25~29, from lower portion of cone, phloem creeps 
about xylem so that concentric bundle is formed; X34. 
In all cases four bundles result a 5, 12, 15, 20, 24, 29), the lower supplying 
the bract, the remaining three the scale 
