200 



ORGANOGRAPHY. 



spike with a few flowers, and these destitute of a true calyx 

 and corolla, their place being occupied hy palece, and the whole 

 inflorescence surrounded at the base by one or two empty bracts 

 (^glumes). These spikelets may be either arranged sessile on 

 the primary axis or rachis {fig. 395) as in Wheat, the whole in- 



Fig. 395. Fig. 396. 



Fig. SOS. Inflorescence of Wheat (Trificitm), consisting of numerous spike- 

 lets arranged on a common axis (rachis) Fig. 3'JC. Branihed inflo- 

 rescence of the Oat {Aveiia sativa}. 



Fig. 397. 



Fio.^iK. Cone of Hem- 

 lock Spruce (Abicn 

 cinuukniiis). 



florescence of which may be therefore called 

 a compound spike; or they may be placed 

 on a more or less braiu;hed axis, as in the 

 Oat, &c. (fig. 396). 



c. The Cone. — Tliis is a kind of spike, 

 found es])ecially in conc-boaring ])lants, as 

 the Larch, Pine, Fir, &c. {fig. 397.) It is 

 composed of female Howers, each of which 

 has at its base a ])cr.si.stent woody scale or 

 Jjract. 



f The Stroblliis or Strobile. — This is a 

 kind of spike with female flowers, each of 



