CATALOGUE. 159 



Franseria* Hookeriana, Nutt. — Arizona, New Mexico, and Colorado. 



Franseria dumosa, Gray. — Low, much branched, shrubby; leaves 

 pinnatifid, with rounded lobes, or bipinnatifid, cinereous, with a short pubes- 

 cence ; mature involucre puberulent or glabrous ; spines flat, more or less 

 involute, long and slender. — Arizona, 



Xanthium strumarium, L. — Utah. 



ZiNNiAf grandiflora, Nutt. (fig. iv, Report of Major Emory, 1848).— 

 Low, much branched from the base, puberulent ; leaves linear or linear- 

 lanceolate, connate at base, acute, rather rigid, distinctly 3-nerved; margins 

 ciliate, 5-12" long; palese fimbriate ; disk orange and rays yellow. In my 

 specimens, the leaves are not always "impressed punctate", and are some- 

 times distinctly glandular-dotted. — New Mexico, Arizona, and Colorado. 

 Collected by Dr. Loew and Professor Wolf. 



SanvitaliaJ Aberti, Gray (PI. Fendl. p. 87). — Annual, erect, 8'-2° 

 high ; stem terete, striate, puberulent, simple or branched ; leaves linear 

 or lanceolate, 3-nerved, hispidly scabrous and hispidly ciliate, attenuated 

 into a petiole; heads few-flowered; outer scales of the involucre lanceolate, 

 dry, distinctly nerved and somewhat longer than the raj T -achenium ; chaff 

 lanceolate, with scarious margins, longer than the disk -flower. — Southern 

 Arizona (519). An exceedingly variable plant. 



Heliopsis parvifolia, Gray (PI. Wright. 2, p. 86). — Erect, smooth 

 or nearly so, simple or branched from the base ; leaves petioled, triangular 

 or triangular-hastate, subserrate or sinuate, 12-18" long; peduncles elon- 



* Franseria, Cav. — " Heads, flowers, &c, as in Ambrosia, except that the fertile involucre is armed 

 with more than one rank of prickles or spines, and is 1-4-celled and 1-4-flowered."— Gray, in Fl. Cal. 1, 

 p. 344. 



t Zinnia, Linn. — Heads heterogamous, radiate; both ray- and disk-flowers fertile. Involucre cam- 

 panulato or sub-cylindrical, the dry, broad, obtuse bracts imbricated in several series, the exterior much 

 shorter ; rays orbicular, cordate at the base, with an obeompressed acheninm destitute of pappus or with 

 one or two short awns; disk-flowers regular, with a somewhat enlarged tube; anthers entire at base. 

 Acheuia angular, with a pappus of short awns produced from the audits; receptacle conical, with many 

 chaffy scales embracing the disk-flowers. 



t Sanvitalia, Linn. — Heads heterogamous, radiate, ray-flowrs fertile, 1-2 series, disk-flowers 

 perfect and fertile. Involucre hemispherical or broadly campannlate, bracts in 2-3 series, somewhat 

 unequal, dry or with herbaceous apices, which on 2-4 of theouterscales are expanded into 6preadiug leaves. 

 Receptacle flat or convex, chaffy, chaff embracing the flowers. Ray-flowers without a tube, as long as 

 the mature achenium, emarginate ; achenium triangular, with a short, stout awn produced from each 

 augle. Disk-flowers regular, tubular, but little enlarged upwardly, 5-dentate at the apex; achenia 

 flattened, the outer ones roughened, nearly awuless, and the inner narrowly winged, indistinctly ciliate, 

 and with two inconspicuous awns. — Benth. & Hook, in part. 



