202 ANTHOTAXY 



Series 1 



Ascending, Acropetal, Indefinite, Indeterminate, Centripetal, or 

 Botryose Forms. 



A. With the rachis not elongated. 



1. The Capitulum or Head, with the flowers, and branches, 



if any, sessile or so regarded (Fig. 578). 



2. The Corymb, with the rachis manifest, though short, and 



its pedicels or branches elongated so as to produce a 

 flat-topped inflorescence (Fig. 577). 



3. The Umbel, similar to the Corymb but with the rachis 



not manifest, so that the pedicels or branches all appear 

 to start from one point at the summit of the peduncle 

 (Fig. 579). 



B. With the rachis elongated. 



4. The Spike, with the flowers, or branches, if any, sessile or 



so regarded (Fig. 583). 



5. The Catkin or Ament, a spike with slender rachis and 



bearing usually staminate or pistillate flowers, crowded 

 and subtended by scales (Figs. 8, 11, and 15). 



6. The Raceme, similar to the spike or ament, but having 



the flowers pedicelled (Figs. 580 and 582). 

 When either the head or spike possesses a thick, fleshy, 

 rachis it is called a Spadix (Figs. 585 and 586). 



Series 2 



Descending, Basipetal, Definite, Determinate, Centrifugal, or Cymose 

 Forms. 



1. The Glomerule, corresponding to the head in all respects 



save that the central flower first develops. 



2. The Fascicle, similar to the glomerule except that the 



flowers are few and loosely clustered. 



3. The Cyme, similar to the corymb or umbel, save that 



the central flower is the first to develop (Fig. 584). 



4. The Scorpioid Raceme. Similar to the raceme, except 



that each successive node and flower upward is lateral to 

 that next below. The apex of the scorpioid raceme is 

 circinately coiled (Fig. 434). 



