EXPLANATION OF THE PLATES. 



17 



PLATE VII. 



ROOTS continued. 



Fig. 



16. Radix dentata, a root whose knobs resemble teeth ; a 



species of the granulated root, and exempli- 

 fied in Primula. 



17. - palmata, a hand-shaped root, as in the genus 



Orchis. 



18. - repcns, a creeping root; a root which extends 



in a horizontal direction, and sends forth radi- 

 cles at certain intervals, as in the Couch- 

 grass. 



19. Bulbs produced in the angle formed by the leaf and 



branch, as in Ranunculus Jicarm, or Pile- 

 wort. 



20. Roots sent forth from the midrib of the leaf, as in 



Cuckoo-flower, (Cardamine.) 



21. Roots produced from the joints of the stalk, as in Poten- 



tilla reptans. 



Fig. 

 1. 



2. 

 3. 



4. 

 5. 



PARTS OF FRUCTIFICATION, 

 a CALIX. 



Perianthium, the flower-cup properly so called. 



Amentum, a catkin. 



Spatha, a sheath ; as in Narcissus. 



f Calix auctus, an increased calix; a perianth, which has 

 a row of leaves distinct from the flower-cup sur- 



[ rounding the base, as in Dianthus. 



Involucrum universale, the universal calix, or cover of an 

 umbelliferous flower, which is placed under 

 the large or general umbel. 



partiale, the partial calix, or cover of an umbel- 

 liferous flower, which is placed under the 

 smaller or partial u-mbel. 



Calyptra, the calix of the Mosses. 



Volva, the calix of \h& fungi, or mushroom tribe. 



Gluma, the husky calix of the grasses. 



VOL. I 2. 



