106 ACADEMIC BOTANV. 



(Privet). In all these cases the terminal or central flower of each sec- 

 ondary axis (branch) opens first. Cymose umbels and true or Cymose 

 corymbs have the same character. "When but one side of the rachis is 

 developed, the cyme is Scorpioid, or Scorpion-like ; Fly-trap (Fig. 

 112). 



S28, The Euphorbia inflorescence is very interesting. Each appar- 

 ently single flower is really a cyme. The white, corolla-like part is an 

 involucel (Pig. 146, B) ; the cyme which it encloses onsists of a cen- 

 tral female flower reduced to a pedicelled ovary ; this is surrounded by 

 male flowers, each one of which (C) is reduoe"d to a pedicelled stamen 

 with a bract. 



229. Fascicle. Cymes with short, erect, nearly equal pedicels, 

 closely clustered ; Sweet-William. 



230. Glomerule. More compact than the fascicle; flowers nearly 

 sessile; White Bee-Balm. 



231. Verticillaster. Short fascicles in the axils of opposite leaves, 

 forming an apparent verticil or whorl around the stem ; Thyme, 

 Coffee (Fig. 147). 



232. The reduction is carried still farther; the Cymose Spike (or 

 spicaie cyme) is seen in the Stone-crops ; with sessile, or nearly sessile, 

 flowers on spikes branching from a common centre ; the inflorescence 

 here (usually with 5 flat spikes or branches) resembles a star ; Ken- 

 tucky Kock-moss (Sedum pulchellum, S. ternatum). 



233. Mixed Inflorescence includes both the Definite and 

 Indefinite Modes. In the Thyme and Coffee (Fig. 147) 

 the general inflorescence (on the stem) is indefinite, whilst 

 the special inflorescence (in the fascicles) is definite. In 

 the Sunflower Order the general inflorescence is definite, 

 the special inflorescence (head) is indefinite. 



LESSON XXI. 

 THE FLOWER. 



234. The typical flower. 235. Radical numbers. 236. Deviations. 

 237. Mimicries : Dancing-Girls. 238. Orchids. 239. Passion-flower. 

 240. Common Names. ^41. Fruit-mimicries. 242. Floral colors. 



234. The Typical Flower — exhibiting the highest type 

 of differentiation, development, and symmetry — is ele- 



