342 



199 



MORPHOLOGY. 

 200 



202 



tyledons the forms are infinite, as are also the variety and splendour 

 of the colour. The following are the main points : 



The individual petal exhibits, on a reduced scale and in a deli- 

 cate condition, almost every variety of form of the leaf, with the 

 exception of the truly compound. Concave forms are here frequent, 

 such as the hood-shaped, pitcher-shaped, or spurred petals, &c. ; 

 these latter very often on individual petals of an otherwise regular 

 corolla (as, for instance, in Fumaria). Fringed and feathered 

 forms, as well as variously lobed petals, are also by no means rare. 

 The limb and the claw are often clearly to be distinguished. Parts 

 analogous to the ligule, and every imaginable form of appendage, 

 with the exception only of the stipules, occur frequently, and cha- 

 racterise genera and families. 



On this account it is indispensable to distinguish the simple 

 appendages of the petals from the independent foliar organs. 

 To the former belong the scales (fornices) of the Boraginacece, the 

 scales of the corona of the Silenece, the formations generally 



99 Canna exigua. Developed flower. , Inferior germen , b, calyx ; c, external, and 

 d, internal circle of the perianth ; e, stamens ; e', style. 



* Isatis tinctoria. Flower, a, Four-leaved calyx; b, four-leaved corolla; c, six 

 stamens ; d, pistil. 



801 Salvia patula. Flower, e, Five-membered coherent bilabiate calyx ; a, upper lip 

 of the 5-merous coherent bilabiate corolla, formed of two leaves; c, d, lower lip, 

 formed of three leaves, a central and two lateral ones; b, style and bifid stigma. 



2 Actinomeris alternifolia. Single flower, e, Bract (palea, Auct. ); f, inferior ger- 

 inen ; d, stunted calyx, originally five-membered (hairy crown, pappus, Auct.) ; c, tubular 

 corolla, formed of five coherent petals ; 6, tube of the five cohering anthers ; a, style 

 with two stigmas. 



