﻿! COMPOSITiE. GrMNOSPERM.4 



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

 .— Sutfruticose and fastigiately branched (American) plants, glabrous 

 itly glutinous or varnished, with the habit of Solidago § Euthamia 

 ives alternate or sometimes opposite, oblong or Hnear, sessile, entire, punc 

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

 ally corymbose-fastigiate. Flowers yellow. 



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

 flowers 5, those of the disk about 3. DC. ! prodr. 5. p. 312. 



Texas, Dr. Riddell .'—Ugules not half the length of the tube. Achenia 



tions at the same time tlieir length as 12 to 15 linesfand^their breadth 2 lines! 



Subdiv. 2. AcHYRiDEiE, Z>C.— Pappus composed of several persistent chaf- 

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



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

 l,t.\, 8f prodr. 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, 



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

 disk-flowers) oblong-linear, rai 



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 Sericocai 



rved) impressed-pu; 



Heads 



