Heads discoid, 5--10-flowered; flowers perfect. Involucral scales nearly equal, little imbricated. Receptacle naked. Corolla-lobes short-ovate or oblong. Achenes 10-ribbed; pappus of rather rigid bristles, not plumose.--Perennial herbs, fibrous-rooted, with broad entire leaves, obscurely or not at all punctate, and cymules of small heads in a thyrse or panicle. Flowers rose-purple, in autumn. (Name an anagram of _Liatris_.) 1. T. odoratíssima, Cass. (VANILLA-PLANT.) _Very smooth; leaves pale_, thickish, obovate-spatulate, or the upper oval and clasping; _heads corymbed_. (Liatris odoratissima, _Willd._)--Low pine barrens, Va., and southward.--Leaves exhaling the odor of Vanilla when bruised. 2. T. paniculàta, Cass. _Viscid-hairy_; leaves narrowly oblong or lanceolate, smoothish, those of the stem partly clasping, _heads panicled_. (Liatris paniculata, _Willd._)--Va. and southward. 10. GUTIERRÈZIA, Lag. Heads few--several-flowered, radiate; rays 1--6, pistillate. Involucre oblong-clavate; scales coriaceous with green tips, closely imbricated, the outer shorter. Receptacle small, naked. Achenes short, terete; pappus of about 9 chaffy scales, shorter in the ray-flowers.--Suffrutescent (our species), glabrous and often glutinous, much branched, with narrowly linear entire alternate leaves, and small heads of yellow flowers in fastigiate or paniculate cymes. (From _Gutierrez_, a noble Spanish family.) 1. G. Euthámiæ, Torr. & Gray. Low; leaves numerous, 1--2´ long; heads usually crowded, the disk- and short ray-flowers usually 3 or 4 each.--Dry plains, Mont. and Minn. to central Kan., southward and westward. 11. AMPHIÁCHYRIS, Nutt. Heads hemispherical; rays 5--10. Disk-flowers perfect but infertile. Pappus of the ray minute, coroniform; of the disk-flowers of almost bristle-like scales, more or less dilated and united at base.--A diffusely much-branched annual, with heads solitary on the branchlets; otherwise as Gutierrezia. (From ἀμφί, _around_, and ἄχυρον, _chaff_.) 1. A. dracunculoìdes, Nutt. Rather low, slender; leaves narrowly linear, the upper filiform; disk-flowers 10--20, their pappus of 5--8 bristle-like chaff united at base and slightly dilated upward.--Plains, Kan. and southward. 12. GRINDÈLIA, Willd. Heads many-flowered, radiate (or rayless); ray pistillate. Scales of the hemispherical involucre imbricated in several series, with slender more or less spreading green tips. Achenes short and thick, compressed or turgid, truncate, glabrous; pappus of 2--8 caducous awns. Coarse perennial or biennial herbs, often resinous-viscid, ours glabrous and leafy with sessile or clasping alternate and spinulose-serrate or laciniate rigid leaves, and large heads terminating leafy branches. Disk and ray yellow. (Prof. _Grindel_, a Russian botanist.)