88 PLANTZ FENDLERIANE. 
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. Fuaverta aneustiroLia, Pers.; DC.! Prodr. 5. p. 635. Low prairie, Mid- 
dle Spring of the Cimarron; Aug.* (536.) 
+407. Dysopia cHrysaNTHEMoIDEs, Lagasca ; Torr. & Gray, Fl. 2. p. 362. Santa 
Fé Creek; June. (526.) — D. tagetoides, Torr. §- Gray, 1. 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 Aciphyllea, the genus Dysodia will be left much 
more homogeneous; the palew of the pappus in all pinnato-pilosus v. plumosus. The 
result of the study of some interesting North Mexican materials is subjoined.t 
* Besides F. Contrayerba, two undescribed species occur in North Mexican collections, viz. : — 
FLAVERIA LONGIFOLIA (sp. nov.) : erecta, stricta ; foliis carnosis angusto-linearibus prelongis sursum attenu- 
atis acutissimis szepe 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. Gregg ; 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. cnnor£Foxta (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. 
Wislizenus ; 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. 
+ HYMENATHERUM, Cass., DC. (excl. §2), non Less. 
Pappus e paleis 10 indivisis vel superne trifidis, aut omnibus aut alternis 1 — 3-aristatis; aristis scabris. 
Squame involucri 1—2-seriales, in cupulam pl. m. concrete. 
§ 1. Palez pappi rigide, conformes, alterne paulo breviores, omnes aristate vel acutate. Involucrum brac- 
teatum, squamis fere ad apicem concretis. — Herbe biennes ? erecta, rigide, glabre ; foliis linearibus, pinna- 
tifido-laciniatis dentibus subulatis, vel integris; pedunculis subcorymbosis nudiusculis. 
_ H. tacetomes: caule pedali apice corymboso ; foliis elongatis subpinnatifidis, nempe, laciniis elongato- 
subulatis utrinque 6-10 instructis, ramealibus integrioribus ; bracteis utrinque pauci-setigeris involucro cylin- 
dracei-campanulato (sicco cartilagineo) subbrevioribus; ligulis elongatis; receptaculo convexo alveolato ; 
pappo achenio 4- 5-gono breviore tubum corollz disci non superante, paleis coriaceis lanceolato-subulatis sub- 
trifidis vel integriusculis 1 —3-cuspidatis seu apice subaristatis. Dysodia tagetoides, Torr. §- Gray, Fl. 2. p. 
