GAILLARDIA AMBLYODON. 33 



arrested by frost. The foliage is of a lighter hue than is represent- 

 ed in the engraving. The leaves are rather thick and fleshy, 

 clothed with a minute and inconspicuous close pubescence ; and the 

 midrib beneath is sparingly fringed with bristly hairs similar to 

 those which beset the stem, branches, and involucre. The capitu- 

 lum, with the expanded rays, is fully two inches in diameter. 

 The callous bases of the scales of the involucre are more strongly 

 coarctate than in any other species. The spreading foliaceous part 

 of the scales is usually very narrow, but in some spontaneous speci- 

 mens the exterior are more or less dilated. The rays are closely 

 set, cuneate-oblong in shape, three-lobed at the apex merely ; their 

 upper surface is of a deep cinnabar color, verging to orange towards 

 the tips, especially in fading, but gradually deepening to red-brown 

 next the base ; the lower surface is browner than the upper. The 

 tips of the exterior disk-corollas are very deep brown-purple, as are 

 also the exserted filiform lobes of the style ; while the central flowers 

 are generally yellow. The disk-flowers persist in fruit, when they 

 are quite showy, having much the appearance of a Scabious. The 

 pappus consists of six to eight scarious and chafl'-like ovate-lanceo- 

 late scales ; those of the disk produced into awns, about the length 

 of the corolla, as in the other species of the genus, while those of 

 the ray-flowers are remarkable for being awnless. The specific 

 name was chosen by M. Gay to express this peculiarity. '' 



Tab. IV. Gaillardia amblyodon ; branch of the natural size. Fig. 1. 

 Ray-flower ; the involucellate villous tuft at the base of the ovary spread open. 

 Fig. 2. Disk-flower. Fig. 3. Capitulum, with the flowers removed, to show 

 the acicular fimbrilJEe of the receptacle. Fig. 4. Two of the fimbrillas de- 

 tached. Fig. 5. Achenium from the disk, with the pappus. All but Fig. 3 

 more or less magnified. 



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