114 



PLANTJE WRIGHTIAN^. 



V. 



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

 also in the coll. of 1851. (Near Saltillo, Grecf^, No. 421.)— A mucli-branclied, 



resiniferous shrub, from thrce to iive feet high. 



356. Flaveria Con'trayerba, Pers. ; DC. Prodr. 5. p. 635. Rio Grande, Texas 



and Ncw Mexico, 



357. F. CHLORjiFOLiA, Graj/, Pl Fendl. j). 88, adnot. Saline marshes near Pre- 



sidio dc Kio Grandc. — Plant two or three feet high. 



358. Dysodia chrysantiiemoides, Lagasca ; J)C. Prodr. 5. p. 640 ; Grai/, Pl. 

 Fendl. p. 88. D. fastigiata, DC. ! l c, eaicl. syn. Mountain valleys, between the 

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

 shortcr than the achcnium, and not longer than the disk-corolla. De Candolle's 

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

 moides with a rather longcr pappus. But the Bocbera fastigiata, H. B. K. (a name 

 thut Dc Candolle has inadvertently omitted to cite) is a diflferent 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- 

 mcns prcscrved in the herbarium of the Paris Museum.* — I should likewise refer 



squamellis inter • aristas graciles parvis. — ]\Iexico, GhieslrecJit, No. 385. Var. ^. foliis membranacels 



Mexico, Ghieshrecht, No. 387 (v. sp. in herb. 



basi 



Mus. Pur.). — Ou tbe tlckot tbe plant is said to grow in a warm region, and to be " arborescent." Pe- 



dunclcs stout, tbrce or four incbes long. Involucre two thirds of an incb in diameter. Flowers smaller tban 



ibose ofZ. helianthoides, but very similar. Tbe awns of tbe pappus are more slender, and the crown of 

 paleoln^ minute. 



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



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



pballs hlrsutis ; involucro bemIspha;rico biseriali, squamis exterioribus lanceolato-oblongis apice foliaceo 



laxo interiores ovales subsuperantibus ; ligulis aurantiacis vel flammeis discum paullo excedentibus ; 



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



Par.). — Head half an incb or more in lengtb, on a peduncle of tbree or four incbes long. Involucre 



strictly blserial, mucb as in Z. Texana ; tbe sbort and narrow cbaff of tbe 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. (Lasianth^a) Seemannii (sp. nov.) : folils oblongo-lanceolatis vel sublinearibus obtusis vel acutius- 

 cuhs basi m pctiolum brevem angustatis subintegerrimis coriaceis parallele triplinerviis ramis ramulisque 

 angulatis scabris ; capitul.s axillaribus subsolitariis et terminalibus umbellatis pedunculis longloribus ; in- 

 volucro cyhndraceo plur.ser.ali, squamis oblongis chartaceis appressis appendice brevisslma abrupta sub- 

 herbacea obtus.ssima terminatis, extcrioribus seriatim brevioribus ; ligulis flavis elongatis ; pappi paleolis 

 parvuhs aristis basi paleaceo-ditatatis confluentibus. - Cerro de Pinal, N. W. Mexico, Seemann (herb. 

 Hook.). -Stem paniculately brancbed ; the bmnches slender, erect, scabrous with a minute and closely 

 appressed stngulose pubescence. Leaves somewhat sbining, two to four inches long, from tbree to scven 

 Imes w,de, glabrate beneath, h.spid-scabrous above. Heads four or five togetber in a sessile terminal umbel 

 or fasccle a.id subsohtary .n tbe upper axils. Involucre cylindrical or subclavate-oblong, nearly half an 

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

 no ch from tbe appressed body of tbe scale. Ligules six or eight, about five lines long. Disk-corollas, 

 pale. of the rcceptacle, &c., much as .n the several preccding species. - Apparently related to the discoid 

 Lipocbffitafasciculata, DC.,butaremarkablydistinctspecies. 



• Dysodia tagetiflora (Lag. Nov. Gen, &■ Sv n 2^)^ • f.nn1*. or»„f^ •/..••• 



. . ^ ^f.. ^ P' P- '^^) • ^^"'^ erecto ; ramis fastigiatis pedunculo nudo 



apice mcrassato termmatis ; foUis v Ilosulis pinnatinarthi^ sefTmpnt;» Kn^o "i, ! ""^"'" ' 



, ut« iJiiit.dupann.s, segmentis Imeanbus argute serratis ; involucro 



/ 



