304 



BOTANY, 



1, Lateral branches in all parts of tlie flower- 

 cluster developed — e.g., Cerastium Forked Cyme. 



3. Some of the lateral branches regularly suppressed. 

 (a) The suppression all on one side — e.g., 



Hemerocallis Helicoid Cyme. 



(6) The suppression alternately on one 



side and the other — e.g., Drosera. .Scokpioid Cyme. 

 (The last two are frequently called False Racemes.) 



O. MIXED INFLORESCENCES. 



1, Oymo-Botryose, in which the primary inflores- 

 cence is botryose, while the secondary is 



cymose, as in Horse-chestnut Cymo-Botrys. 



(This is sometimes called a Thyrsus.) 



a. Botryo-Cymose, in which the primary inflores- 

 cence is cymose, while the secondary is botry- 

 ose — e.g. , in many Compositse Botry-Cyme. 



In addition to noting the kind of inflorescence, examine and de- 

 scribe the bracts (small leaves), pedicels, and 

 larger branches of the flower cluster, noting 

 their shape, size, surface, and color. 



FLORAL SYMMETRY. 



Floral Whorls — The parts of the flower are 

 mostly arranged in whorls or cycles, distinctly 

 separated from each other {cyclic flowers) ; in 

 some cases they are arranged in spirals, with, 

 however, a distinct separation of the different 

 groups of organs {hemicyclic flowers) ; in still 

 other cases the arrangement is spiral through- 

 out, with no separation of the groups of 

 organs (acyclic flowers). 



In cyclic flowers there are most frequently 

 four or five whorls, viz. (Fig. 198) : 

 Fig. 198.— Diagram to 1- The Calyx, composed of (mostly) green 

 show the four floral ggnals 



whorls; the lowermost, „ ^, „ „ , , , , , , 



the sepals, composing a. Ihe VoroUa, composed of (mostly) col- 



peta'it!''cimpos?nf thl "^^d P^<«^«- The calyx and corolla may be 

 corolla; the next the spoken of collectively as the pe™m<7«. This 

 stamens, composing the . • j, iii i ■, c a t 



andrceclum ; the upper- ^^m is used also when but one whorl of floral 

 most the pistils, compos- leaves, or a portion of it only, is present, 

 mg the gyncecmm. a ,A\m a j ■ j/^ 



3. (4.) The Anar(Bc%um, composed of one 



or two whorls of stamens. 

 4 or 5, The Oyncecium, composed of the pistil or pistils. 



