122 



STRUCTURAL BOTANY. 



ened =- corymb (459) ; the corymb the rachis = umbel (460) ; the umbel pedicels = 

 head (464), etc. 



(For the phenomena of Flowering, Coloring, the Floral Calendar, the Floral Clock, see 

 the Class Book of Bo tar 7, pp. 75-77.) 



Review. 355. Name the varieties of axillary inflorescence. What is the Spike ? 356. 

 What is the Spadix? 357. Compare the Ament and Spike. 358. Give examples of Ra- 

 cemes. Compare the Raceme and Corymb. How does the Corymb become compound ? 

 859. How change Corymb to Umbel ? What is the Compound Umbel ? 360. Describe 

 the Panicle The Thyrse. 361. What is the Head ? 362. Describe the Capitulum of Com- 

 positae. What its involucre? Its outer flowers? Its inner flowers? 363. Name the 

 varieties of Terminal Inflorescence. 364. Describe the Cyme. Show by fig. 456 how it is 

 developed. 365. Nature of the scorpoid cyme. 366. What is the glomerule ? 367. Show 

 the relations of Spike to Raceme Of Raceme to Corymb, etc. (457-464.) 



% Hitherto we have treated of the organisms of the Phtenogamia, or Flowering 

 Plants, the higher of the two Subkingdoms of the vegetable world. The other Subking- 

 dom, called the Cryptogamia, or Flowerless Plants, includes the lower tribes of vegeta- 

 tion, such as the Ferns, Mosses, Lichens, etc., never adorned with flowers, and producing 

 spores instead of seeds. For the Morphology of these tribes, see the Class Book of Bot- 

 any, pp. 124-129. Or study carefully the descriptions at the head of the several Crypto 

 gamic Orders in the present volume. 



Kig. 460 bis, A Fern ; Tolj-podium vulgare. 461 bix, Club-moss ; Lycopodium dendroideum. 462 bis 

 Kquisetum (Scouring Rush). 463 MJJ, a Liverwort Moss ; Jungermannia. 464 bis, a Fungus or Mueh 

 room Agaricus, iu three stages of growth. 



