AND GENERA OF PLANTS. 321 



late, producing small, membranaceous, not exserted scales. Achenium obo- 

 vate, compressed, densely lanuginous; pappus short and unequal, pilose, bar- 

 bellate. — A low subalpine perennial, with a ligneous root, sending up many- 

 stems; leaves alternate, cuneate, serrate, the serratures ending in bristles; 

 capituli corymbose. — Allied to Aplopappus, but very distinct from the true 

 Chilian species, both in the absence of rays and the nature of the pappus. 

 Allied to the preceding genus, but with a different involucrum, receptacu- 

 lum and stigma, &c. — (So called from its lanuginous fruit.) 



Eriocarpum * Grindelioides. 



Hab. On shelving rocks in the Rocky Mountain range, Oregon. Stems about six inches high, 

 pubescent, as well as the under side of the leaves. Leaves about one to one and a half inches 

 long, by three to four lines wide, ciliate, serrate, cuneate-oblong. Florets scarcely exserted be- 

 yond the fulvous pappus, pale yellow, the teeth never expanding, and the summits or cusps of the 

 anthers exserted and conspicuous. Pappus scarcely longer than the achenium. 



*AMMODIA. 



Capitulum homogamous, many-flowered, florets tubular, five-toothed; stigmas 

 elongated, slenderly filiform, equal and pubescent. Anthers not bisetose. 

 Receptacle naked, alveolate. Involucrum loosely imbricate, scales acute, 

 flat, one-nerved, membranous on the margin, gradually shorter. Achenium 

 oblong-linear, compressed, pubescent, slenderly striate, acuminate at base; 

 pappus pilose, copious, slender, scarcely scabrous. — An inconspicuous flow- 

 ered perennial, with entire, alternate, oblong, narrowish leaves. Capituli in 

 an irregular compound corymb; involucrum obconic, florets very numerous, 

 pale yellow, upper part of the stem and involucrum glandjilar. — Allied ap- 

 parently to Inula, but the anthers not bisetose, and the ray wholly wanting. 

 Yet, at first glance, the plant might readily be mistaken for Inula viscosa, in 

 which the anthers are furnished with basal setse, or the /. ammophila, /?. 

 salsoloides of China! — (The name given is in allusion to its predilection for 

 sandy places.) 



Ammodia *Oregona. 



VII. — 4 F 



