EXPLANATION OF THE PLATES. 337 



Fig. 2.— An enlarged radial floret, a. The flat or strap-shaped 

 border, b. The tube with the bifid stigma and style, but 

 without stamens, and therefore imperfect, c. The germ, des- 

 titute of down or pappus. 



Fig. 3.— One of the tubular perfect florets, possessed of the tube 

 of stamens and the style. 



Fig. 4.— Exhibiting a section of the naked conic receptacle and 

 persisting calyx. 



Fig. 5. — A small branch of Arctotis anthemoides, with bipinnati- 

 fid leaves, and exhibiting its appearance in seed. a. One of 

 the seeds crowned with a 5-leaved chaffy pappus, analogous 

 to the character of a true calyx. 



Fig. 6.— The floret of a Thistle, a. The tubular 5-cleft floret. 

 b. The undivided cylindric stigma, c. The germ. d. The 

 downy pappus. 



Fig. 7.— The flower of the Dandelion (Leontodon Taraxacum), 

 made up of strap-shaped perfect florets, b. The lower part of 

 the calyx, which is reflected, a. The runcinate leaf, or with 

 the sharp segments reflected downwards. 



Fig. 8. — An enlarged floret of the above, a. The notched floret. 



b. The tube of anthers. 



Fig. 9. — a. The cylinder of 5 united anthers, b. The 5 filaments. 



c. The style, with its bifid stigma. 



Fig. 10. — The ripe seed, with a stipitate or stalked pappus, a. The 

 pappus, b. The stipe, c. The seed. 



PLATE VII. 



THE PRINCIPAL FORMS OF SIMPLE LEAVES. 



Fig. 1. — A peltate orbicular leaf, or one with the petiole inserted 

 into the disk so as to represent a shield or target. ( Tropceo- 

 lum, or Indian Cress). 



Fig. 2. — A reniform leaf, with a crenate or roundly toothed mar- 

 gin. (Ground-Ivy). 



Fig. 3. — A cordate or heart-shaped leaf, with an acuminated point, 

 and a serrated margin. (Aster cordifolium) . 



Fig. 4. — An ovate entire leaf. ( Vinca minor). 



Fig. 5. — A lanceolate acuminated leaf, with a serrulated margin. 

 a. The cleft stipules or foliar appendages. (The Peach tree). 



Fig. 6. — A linear, acuminated, and sheathing leaf; — that of the 

 Grasses. 



Fig. 7. — A deltoid or triangular, serrated leaf. (Lombardy Pop 

 lar). ? 



29* 



