384 



BRITISH FLOWERING PLANTS 



trees is amazing. 



It is formed in the spring, remains 

 dormant in the mouth of the ovule 

 all through the summer, autumn, 

 and winter, and rouses itself to 

 fertilise the ovule in the following 

 spring. The fruits open under the 

 influence of dry winds, which carry 

 off and scatter the winged seeds. 



The bud ^ is covered by brown 

 elongated scales, which are spirally 

 arranged on the axis, and represent 

 the primary leaves. They rest on 

 a pedestal or base (Figs. 305, 306), 

 which in the winter is green, and 

 from which they are easily stripped 

 oS, leaving a whitish scar. The bud 

 may be divided into three parts (Fig. 

 307). The lower, which occupies 

 from one-fifth to one-tenth of the 

 length, is somewhat narrower than 

 the rest {sc'). No needles are de- 

 Fragment of terminal bud veloped on this part of the bud. 



represeutmg seven tiers ot ■>■ . t t, , ■ / \ • j_i 



scales of the winter bud, ihc middle pOrtlOn [SC) IS the 



x6. sc, three scales with longest, and, wheu the brown por- 



their fringed membranous _ o ' ' _ r 



margin, the rest have been tlOU 01- tilC primary IcaVCS haS DCen 



renfskit;;rbudstf Stripped off, has, from their spiral 

 secondary leaves in the arrangement. Very much the appear- 



axila of tlie primary. ^^^^ ^f ^^ elongated COUC. At the 



base of each pedestal is a small axillary bud, bearing 

 the secondary leaves or needles in pairs (Fig. 305, I). 

 At the apex are the terminal {tb") and lateral buds (Ih) 

 for next year. 



The brown terminal part of the 

 primary leaves is thrown off in spring, 

 and these secondary leaves form the f ih. soe.—Pmus sy™ 

 needles. The brown primary leaves 

 are thicker towards the centre, and thin 

 off towards the edges. They consist of diverging fibres 



' Avebury (Lubbock), On Buds and Slipides. 



Fig. 305. — Pinus sylvestris. 



tris. A detached 

 scale-base. 



