LEAVES. 23 



arm of a man holding a shield. Ex. Nasturtium, Tra- 

 pceolum inajns, 



3. SESSILE, (sessilia) are sucli as spring immedi- 

 ately from the stein, branch or root, witnout any foot- 

 stalk. 



4. AMPLE XTCATJL, (cnnplexicaulia^) PL 4, fig. 19. 

 Clasping the stem with their hase. Ex. Several of the 

 Asters, as Aster N0v&-Jbigli& and A. amplexicaulis. 



5. CONNATE, (connata.} PL 4, fig. 13. United at 

 their base. Ex. Trumpet Honeysuckle, Lonicera sein- 

 pervivens. 



6. PERFOLTATE, (pcrfoliata.) PL 4, fig. 14. When 

 the stem runs through the leaf. Ex. Uviilaria 2 )er f " 

 liala. 



Observation. The veins or nerves of a leaf will generally deter- 

 mine whether it be a single perfoliate leaf, as in Uvularia perfolhi- 

 ta : or double and connate, as occurs in different degrees in the 

 Trumpet Honeysuckle, J<onicera scripervivens, in Fever wort, Trl 

 osteum perfoliatum, and in Rudbeckia amplexifolia, where the con- 

 nexion is slig-ht. Prof. Bigelotv. 



7. VjLGTKAST^'oaginantia^ PL 4, h'g. 15. Sheath- 

 ing the stem or each other. Ex. Most of the grasses. 

 Wheat, Triticum. 



8. EquiTANT, (eqnilantia.) PL 4, fig. 16. Dis- 

 posed in two opposite rows, and clasping each other by 

 their compressed base. Ex. Flenr-de-luce, Iris. 



9. DECUKRENT, (decnrrentia.^ PL 4, fig. 17. Run- 

 ning down the stem or branch in a leafy border or 

 wing. Ex. Many of the Thistles. Mullein, Verbascmn 

 thapsus. 



10. FLOWER-BE \UING, (flori/era.) PL 4, fig. 18. 

 When flowers grow out of the disk or margin of the 

 leaf. Ex. Ruscuv aculeatus* 



Leaves considered with respect to their form are 

 either simple or compound. 



