4IO 



COMPOSITAE. 



[Vol. III. 



2. Berlandiera lyrata Benth. Lj're- 

 leaved Berlandiera. (Fig. 3873.) 



Silphium NuttaUianiim Torr. Ann. Lye. N. Y. 2: 216. 

 Name only. 1827. 



Berlandiera lyrata '&^rA\i. PI. Hartw. 17. 1859. 



Finely whitish-canescent, acaulescent or short- 

 stemmed; scapes or peduncles slender, 3'-S' long, 

 bearing a solitary head, or rarely 2. Leaves lyrate- 

 pinnatifid, obtuse, petioled, the terminal segment 

 usually larger than the lateral ones, the lower ones 

 very small, all obtuse, mostly crenate, sometimes 

 becoming green and glabrate above; head about i' 

 broad; inner bracts of the involucre much broader 

 than the outer, orbicular, or wider than long; 

 achenes obovate, keeled on the inner face. 



In dry soil, Kansas to Texas, Arizona and Mexico. 



53. ENGELMANNIA T. & G. Fl. N. A. 2: 283. 1841. 

 Perennial hirsute herbs, with alternate piunatifid leaves, and corymbose slender-pedun- 

 cled rather large heads of both tubular and radiate yello%v flowers. Involucre hemispheric, 

 its bracts imbricated in 2 or 3 series, the outer linear, loose, hirsute, ciliate, the inner oval 

 or obovate, concave, appressed, subtending the ray-flowers. Receptacle flat, chaffy, the 

 chaff" subtending and partly enclosing the disk-flowers. Rays S-io, pistillate, fertile. Disk- 

 flowers about as many, tubular, perfect, sterile, the corolla 5-toothed. Anthers minutely 

 2-dentate at the base. Style of the tubular flowers undivided. Achenes obovate, compressed, 

 not winged, i-ribbed on each face. Pappus a persistent irregularly cleft crown. [Named 

 for Dr. Geo. Engelmann, botanist, of St. Louis.] "^ 1 



A monotypic genus of the south-central United 

 States. 



I. Engelmannia pinnatifida T. & G. 



Engelmannia. (Fig. 3874.) 



Engelmannia pinnatifida T. & G. Fl. N. A. 2: 2S3. 

 1 841. 



Stem usually branched above, i°-3° high. Basal 

 leaves slender-petioled, 4'-S' long, their lobes 

 lanceolate or oblong, dentate or entire, obtuse or 

 acutish; upper leaves smaller, sessile, less divided, 

 the uppermost sometimes entire, or with a pair of 

 basal lobes; heads usually numerous, about i' 

 broad; peduncles I'-s' long; outer bracts of the 

 involucre somewhat in 2 series, the first linear, the 

 second broadened at the base. 



In dry soil, Kansas to Louisiana, Arizona and North 

 Mexico. May.-.^ug. 



54. PARTHENIUM L. Sp. PI. 9SS. 1753. 



Perennial, mostly pubescent or canesceut herbs, or shrubs, with alternate leaves, and 

 small corymbose or paniculate heads of both tubular and radiate white or yellow flowers. 

 Involucre broadly campauulate or hemispheric, its bracts imbricated in 2 or 3 series, obtuse, 

 appressed, nearly equal. Receptacle convex or conic, chaffS-, the chaff" membranous, sur- 

 rounding the disk-flowers. Ray-flowers about 5, pistillate, fertile, their ligules short, broad, 

 2toothed or obcordate. Disk-flowers perfect, sterile, their corollas 5-toothed, the stj-le 

 undivided. Anthers entire at the base. Achenes compressed, keeled on the inner face, 

 margined, bearing the persistent raj-s on the summit. Pappus of 2-3 scales or awns. 

 [Greek, \'irgin.] 



About 10 species, natives of North America,Mexico, the West Indies and northern South .\merica. 



ides the following, some 5 others occur in the southern and southwestern United States. 



