114 PLANTJE WRIGHTIAN^. T. 



355. Flourensia cernua, DC. Prodr. 5. p. 593. Prairies, east of El Paso ; Sept. : 

 also in the coll. of 1851. (Near Saltillo, Gregg, No. 421.) — A much-branched, 

 resiniferous shrub, from three to five feet high. 



356. Flaveria Contraterba, Pers. ; DC. Prodr. 5. p. 635. Rio Grande, Texas 

 and New Mexico. 



357. F. CHLOR^FOLiA, Gray, PI. Fendl. p. 88, adnot. Saline marshes near Pre- 

 sidio de Rio Grande. — Plant two or three feet high. 



358. Dysodia chrysanthemoides, Lagasca ; DC. Prodr. 5. p. 640; Gray, PI. 

 Fendl. p. 88. D. fastigiata, DC.! I. c, excl. syn. Mountain valleys, between the 

 Limpia and El Paso ; Sept. — The specimens belong to the form with the pappus 

 shorter than the achenium, and not longer than the disk-corolla. De Candolle's 

 D. fastigiata, described from Alaman's Mexican specimens, is only D. chrysanthe- 

 moides with a rather longer pappus. But the Bcebera fastigiata, H. B. K. (a name 

 that De Candolle has inadvertently omitted to cite) is a different species, of which 

 Humboldt and Bonpland's specimens accord so well with Lagasca's description of 

 his D. tagetiflora, that I restore that name, completing the character from the speci- 

 mens preserved in the herbarium of the Paris Museum.* — I should likewise refer 



squamellis inter aristas graciles parvis. — Mexico, GTiiesbrecTit, No. 385. Var. /3. foliis membranaceis 

 vix scabris basi plerumque acutis longius petiolatis. — Mexico, Ghiesbrecht, No. 387 (v. sp. in herb. 

 Mus. Par.). — On the ticket the plant is said to grow in a warm region, and to be " arborescent." Pe- 

 duncles stout, three or four inches long. Involucre two thirds of an inch in diameter. Flowers smaller than 

 those of Z. helianthoides, but very similar. The awns of the pappus are more slender, and the crown of 

 paleolse minute. 



Z. (Lasianthjea) ceocea (sp. nov.) : foliis oblongo-ovatis acuminatis serrulatis reticulatis basi subcor- 

 datis brevissime petiolatis canescenti-villosis subtus mollissimis ; pedunculis solitariis elongatis monoce- 

 phalis hirsutis; involucro hemisphserico biseriali, squarais exterioribus lanceolato-oblongis apice foliaceo 

 laxo intei-iores ovales subsuperantibus ; ligulis aurantiacis vel flammeis discum paullo excedentibus ; 

 aristis pappi basi dilatatis, squamellis intermediis minutis. — Mexico, Ghiesbrecht (No. 387, in herb. Mus, 

 Par.). — Head half an inch or more in length, on a peduncle of three or four inches long. Involucre 

 strictly biserial, much as in Z. Texana ; the short and narrow chaff of the receptacle, the slender disk- 

 corollas with a very short limb, and the long exserted anthers, &c. as in the foregoing species, of which it 

 is a true congener. 



Z. (LASiANTHiEA) Seemannii (sp. nov.) : foliis oblongo-lanceolatis vel sublinearibus obtusis vel acutius- 

 culis basi in petiolum brevem angustatis subintegerrimis coriaceis parallele triplinerviis ramis ramulisque 

 angulatis scabris ; capitulis axillaribus subsolitariis et terminalibus umbellatis pedunculis longioribiis ; in- 

 volucro cylindraceo pluriseriali, squamis oblongis chartaceis appressis appendice brevissima abrupta sub- 

 herbacea obtusissima terminatis, exterioribus seriatim brevioribus ; ligulis flavis elongatis ; pappi paleolis 

 parvulis aristis basi paleaceo-dilatatis confluentibus. — Cerro de Pinal, N. W. Mexico, Seemann (herb. 

 Hook.). — Stem paniculately branched; the branches slender, erect, scabrous with a minute and closely 

 appressed strigulose pubescence. Leaves somewhat shining, two to four inches long, from three to seven 

 lines wide, glabrate beneath, hispid-scabrous above. Heads four or five together in a sessile terminal umbel 

 or fascicle, and subsolitary in the upper axils. Involucre cylindrical or subclavate-oblong, nearly half an 

 inch long, but narrow ; the slightly squarrose tips of the inner scales rounded and partly separated by a 

 notch from the appressed body of the scale. Ligules six or eight, about five lines long. Disk-corollas, 

 palea; of the receptacle, &c., much as in the several preceding species. — Apparently related to the discoid 

 Lipochreta fasciculata, DC, but a remarkably distinct species. 



* Dysodia tagetiflora {Lag. Nov. Gen. tf- Sp. p. 29) : caule erecto ; ramis fastigiatis pedunculo nudo 

 apice incrassato terminatis ; foliis villosulis pinnatiparthis, segmentis linearibus argute serratis ; involucro 



