GENERAL PKINCIPLES. 3 



afford the obvious descriptive characters, and form several series 

 according to their vital use, as follows : 



22. NuTJftiTivE Organs are the Cotyledons, Roots, I*eaves, 

 &c. The Hoots are commonly under ground, and the LEAvxa 

 above : while the Cottleboi^s are within the seed. 



w 



23. Rephoducttve Organs which are the Flowers, Fruits and 

 Seeds, with the Buds, Bulbs, and Gems, 



24. Upon the flowers, fruit and seeds are chiefly based the 

 generic and other general characters ; being present and conspi 

 cuous in every plant except those of the lowest orders* 



25. The Roots, Leaves, Flowers, and Fruits assume a great 

 variety of shapes, which have all pecuhar names, and offer the 

 specific characters and distinctions usually resorted to. 



26. UpHOLDtxG Organs such as the stem and branches, the 



Scapes or leafless radical stems. Petioles, Pedicles, Nerves, S;c. 



27. PttESERviXG Organs as the Barks, Cuticles, 8cc. 



28. CiRcuiATiVE Organs which are the Wood, Liber, Pith, 

 Fibres, Vessels, Sec, The woody plants are called Trees or 

 Shrubs. 



29. Secretory Orgat^s, such as Glands, Pores, Hairs, &c. 



20. Accessory Organs are the thorns, bracteoles, stipules, 

 tCRdrils, tubercles, down, wool. Sec. 



0I4 Inflorescexck is the mode In which the flowers are dis- 

 posed and unfolded. 



32. The essential parts of the flowers are the Staxixa or Sta- 

 mens and Pistils : a complete flower has both ; when they are 

 separate, the flowers are called Staminate or Pislilate. 



33. The essential part of the Stamest is the Anther; when the 

 filament or support is missing-, the anther is called sessile. 



34. The essential parts of the Pistil are the Germ or Germzit, 

 and the Sttg^ia. The germ is the bud of the fruit ; it is usually 

 sessile; when it has a support or Podogy.ye, it is called stipitated. 



35. The Germ is usually free and central ; but when it is 

 connected or coherent with the perigone, it is called adherent or 

 inferior, and the perigone becomes symphogyne or superior. 



36. The Stigma is a pore, gland or appendage upon the 

 Germ, single or multiple, sessile or supported by a base called 



SXYiB. 



