192 COMPOSITE. GVMNOSPERMA. 



portion. Achenia oblong-cylindrical, slightly compressed, destitute of pap- 

 pus.— Suffruticose and fasligiately branched (American) plants, glabrous, 

 mostly glutinous or varnished, with the habit of Solidago § Euthamia. 

 Leaves alternate or sometimes opposite, oblong or linear, sessile, entire, punc- 

 tate. Heads small, ternate or aggregated at the summit of the branchlets, 

 usually corymbose-fastigiate. Flowers yellow. 



1. G. corymbosum (DC.) : shrubby; branchlets somewhat angled, dicho- 

 lomous-corymbose ; leaves alternate, oblong [or linear-lanceolate], tapering to 

 each end, somewhat viscid, 3-nerved, the lateral nerves slender; heads ag- 

 gregated three together at the summit of the branchlets, 8-flowered ; the ray- 

 flowers 5, those of the disk about 3. DC' prodr. 5. 2^. 312. 



Texas, Dr. Rlddcll ! — Ligules not half the length of the tube. Achenia - 

 minutely puberulent. — De CandoUe describes the leaves as oblong, but men- 

 tions at the same time their length as 12 to 15 lines, and their breadth 2 lines! 



Siibdiv. 2. AcHYHiDEi;, DC. — Pappus composed of several persistent chaf- 

 fy scales, or short and coroniform, sometimes nearly obsolete in the ray. 



36. AMPHIACHYRIS. DC, (§ of Brachyris) notic. 7. pi. rar. Genev. p. 

 l,t.l, Sfprodr. 5. p. 313 ,• Nutt. in trans. Amer. phil. soc. (n. ser.) 7. p. 313. 



Heads many-(20-40-) flowered ; the ray-flowers (8-10) ligulate, pistillate, 

 fertile, in a single series ; those of the disk staminate and pistillate, but by the 

 abortion of the ovary infertile. Involucre obovoid, shining as if varnished ; 

 the scales 10-12, rigid, appressed, imbricated, often bracteolate at the base, 

 coriaceous, the summit abruptly somewhat foliaceous, mostly obtuse. Re- 

 ceptacle alveolate. Corolla of the ray oblong, with a very short tube ; of the 

 disk much smaller, infundibuliform, 5-toothed. Branches of the style (in the 

 disk-flowers) oblong-linear, rather acute, papillose-hispid quite to the base. 

 Achenia of the ray oblong or obconic, somewhat terete, with a minute coro- 

 niform or nearly obsolete pappus ; of the disk none or a mere rudiment ; the 

 pappus of 5-8 scarious very narrowly linear scales, slightly dilated towards 

 the summit, about the length of the corolla, united at the base into a campan- 

 ulate tube. — A perennial (or possibly sometimes annual) herb, or suffrutes- 

 cent glabrous plant, fastigiately much branched (in the manner of Solidago 

 § Euthamia, with the involucre much as in Sericocarpus) ; with lanceolate or 

 narrowly linear and entire sessile (1-3-nerved) impressed-punctate leaves, 

 the margins scabrous. Heads terminating the numerous branchlets. Flow- 

 ers deep yellow. 



A. dracunculoides (DC. ! 1. c.)—Nutt..' in trans. Amer. phil. soc. I. c. 

 Brachyris ramosissima. Hook.! ic. pi. t. 142 ; DC. prodr. 7. p. 278. 



Western Arkansas, Nuttall ! Pour tales ! Texas, Drummond ! Sept.- 

 Oct. — Stem 1-3 feet high ; the branchlets angled. Leaves l-2_inches long; 

 the lower often 3-4 lines wide ; or all narrow and only 1-2 lines in width 

 (var. angustissima, DC.) ; the lower obscurely 3-nerved. Peduncles more 

 or less bracteolate. Achenia clothed with a very minute appressed pubes- 

 cence. — We have not observed so manifest a pappus in the ray as is repre- 

 sented in Hooker's figure ; nor do we find more than the slightest rudiment 

 of an ovary in the disk-flowers. 



