﻿88 PLANTJE FENDLERIAN.S. 



scabrous-hispid ; the outermost obovate and obtuse ; the next series somewhat produced at 

 the apex ; and the innermost linear and elongated into a rough beak. 



406. Flaveria angustifolia, Pers. ; DC! Prodr. 5. p. 635. Low prairie, Mid- 

 dle Spring of the Cimarron ; Aug.* (536.) 



f407. Dysodia chrysanthemoides, Lagasca ; Torr. fr Gray, Fl. 2. p. 362. Santa 

 Fe Creek ; June. (526.) — D. tagetoides, Ton. #* Gray, I. c, with an allied new 

 Texan species (both of which exhale a pleasant, somewhat anisate odor when bruised) I 

 incline to append to Hymenatherum, notwithstanding some difference in habit. After 

 separating also the doubtful section Aciphjllaea, the genus Dysodia will be left much 

 more homogeneous ; the paleae of the pappus in all pinnato-pilosus v. plumosus. The 

 result of the study of some interesting North Mexican materials is subjoined.f 



* Besides F. Contrayerba, two undescribed species occur in North Mexican collections, viz. : — 

 ■/ Flaveria longifolia (sp. nov.) : erecta, stricta ; foliis carnosis angusto-linearibus praelongis sursum attenu- 

 atis acutissimis saepe falcatis uninerviis spinuloso-denticulatis, superioribus basi lata connato-sessilibus, inferi- 

 oribus inferne angustatis; corymbo terminali nudo densiusculo ; capitulis discoideis 12- 15-floris. — Near 

 Cienega Grande, Coahuila, Dr. G-regg ; May. — The specimens, a foot long, do not show the base of the 

 strict stem. Cauline leaves 4 or 5 inches long, about 2 lines wide near the base, tapering to the apex, nearly 

 all of them denticulate with from 3 to 6 salient mucroniform teeth on each margin. Heads nearly 2 lines 

 long, in a strict and naked compound corymb. 



F. chlor^folia (sp. nov.) : glauca ; caule humili (6- 10-pollicari) e radice perenni ? adsurgentibus sim- 

 plicibus corymbo nudo simplici fastigiato terminatis ; foliis oblongis connato-perfoliatis integerrimis uninerviis 

 subacutis ; capitulis circ. 12-floris discoideis. — Pelayo, northwest of Mapimi, in the State of Chihuahua, Dr. 

 Wislizenns ; May. And winter vestiges of what is doubtless the same species, though the leaves and flowers 

 have fallen, occur in Dr. Gregg's collection, from " a spring northwest of Mapimi." — The leaves of this re- 

 markable species resemble those of Chlora perfoliata. They are not at all narrowed below, but connate-perfo- 

 liate from a broad base, thickish, scarcely an inch long, the upper smaller and inclined to be lanceolate 

 and acute. Heads nearly as large as in the preceding species. 



t HYMENATHERUM, Cass., DC. (excl. §2), non less. 



Pappus e paleis 10 indivisis vel superne trifidis, aut omnibus aut alternis 1 - 3-aristatis ; aristis scabris. 

 Squamae involucri 1 - 2-seriales, in cupulam pi. m. concrete. 



§ 1. Paleae pappi rigidae, conformes, alternas paulo breviores, omnes aristatas vel acutatae. Involucrum brac- 

 teatum, squamis fere ad apicem concretis. — Herbae biennes ? erectse, rigidce, glabrae ; foliis linearibus, pinna- 

 tifido-laciniatis dentibus subulatis, vel integris; pedunculis subcorymbosis nudiusculis. 



>' H. tagetoides : caule pedali apice corymboso ; foliis elongatis subpinnatifidis, nempe, laciniis elongato- 

 subulatis utrinque 6-10 instructis, ramealibus integrioribus ; bracteis utrinque pauci-setigeris involucre cylin- 

 dracei-campanulato (sicco cartilagineo) subbrevioribus ; ligulis elongatis; receptaculo convexo alveolato ; 

 pappo achenio 4- 5-gono breviore tubum corollae disci non superante, paleis coriaceis lanceolato-subulatis sub- 

 trifidis vel integriusculis 1 - 3-cuspidatis seu apice subaristatis. Dysodia tagetoides, Torr. fy Gray, Fl. 2. p. 



