STRUCTURAL BOTANY. 67 



133. The foems of the Gamopetalotjs Coeolla arc to 

 be viewed with reference to limb, tube, and mouth, and 

 are designated as follows : 



Tubular, having a cylindrical tube and a slightly spread- 

 ing limb or border, as in the Primrose, or the tubular flow- 

 ers of the Composites (PI. YII., 6 a, J) ; cwp-shaped, with 

 segments cohering into a concave border (in Kalmia, PL 

 YIII. 6) ; unvsliwped, or urceolate, as in the Whortle- 

 berry ; hell-shaped, with the tube enlarging abruptly at the 

 base and gradually into the limb, as in the Bell-flower 

 (PI. VIII., 2) ; funnelrshaped, narrow-tubular below and 

 gradually widening into the border, as in Convolvulus, 

 Quamoclit (PI. X., 16), etc. ; wheel-shaped, as in Yeronica, 

 Solanum (PI. X., 17), etc. ; saVoer-form, with the tube ter- 

 minating abruptly in a horizontal limb, as in Phlox; 

 ligulate, or strap-shaped, resulting from the splitting 

 down of a tubular corolla (in the Liguliflorous Composites, 

 PI. YII., 75, 95) ; labiate, or hilahiate, two-lipped — that is, 

 with two of the petals placed higher than the rest, foiming 

 the upper lip, and the three remaining ones joined 

 together on the opposite side of the flower, to form the 

 lower (usually three-lobed) lip. This sort of corolla 

 belongs to most Labiates, Figworts, etc. (PI. IX. and X., 

 with numerous bilabiate corollas, etc.) 



133. The foems of the Polypetalous Coeolla are the 

 rosaceous, with 5, more or less equal, roundish, spreading, 

 short-clawed petals ; -mal/oaceous, with 5 petals, their short 

 claws united with the staminal column, aa in Mallows ; 

 cruciform, with 4 long-clawed, spreading petals, placed at 

 right angles to each other, as in the Crucifers ; caryophyl- 

 laceous, with 5 regular, long-clawed, spreading petals, 

 within a tubular calyx, as in Diauthus, Saponaria, Silene, 

 etc. ; papilionaceous, with 5 irregular petals, whereof the 



