IOQ4 APPENDIX. 



ones in their axils, and numerous small cymose heads of yellow tubular 

 and ligulate flowers. Ray-flowers few, the rays short; disk-corollas 

 numerous, 5 -toothed. Involucre campanulate, of 4 or 5 broadly oval 

 bracts, the outer ones overlapping the inner; receptacle nearly flat. 

 Achenes glabrous, striate, linear., terete; pappus a single series of rough 

 and rather stiff whitish bristles. [Greek, referring to the few-bracted 

 involucre.] A monotypic genus of southwestern United States. 



i. Haploe"sthes Gre*ggii A. Gray. GREGG'S HAPLOESTHES. Plant 

 6 dm. high or less, tne branches erect or ascending. Leaves entire, 

 2-5 cm. long, about 1.5 mm. thick, sessile, the lower pairs connate- 

 clasping at the base; involucre 2.5-3.5 mm. high, the outer bracts 

 acutish, the inner blunt; rays mostly shorter than the involucre; achenes 

 2 mm. long, about as long as the pappus. Saline and gypsum soil, Kans. 

 and S. Col. to Texas and adjacent Mexico. April-Sept. 



P. 1035, after Centaurea Calcitrapa, add: 



6. Centaurea Melite"nsis L. Annual, 1.3 m. high or less, gray-pubes- 

 cent or slightly woolly, much branched. Basal leaves lyrate, some- 

 times 1.5 dm. long, their petioles margined, their lobes obtuse; lower 

 stem-leaves few-lobed or entire, the upper narrowly lanceolate, entire, 

 acute, 2 cm. long or less; heads sessile or nearly so, the involucre 1-1.5 cm - 

 thick, its principal bracts tipped with a slender spine 6-12 mm. long, 

 which bears several spinules at its base; corollas yellow, none of them 

 enlarged; pappus-scales unequal. Waste and cultivated grounds, Ga. 

 to Mo., Ariz., Cal. and Ore., and in ballast about eastern seaports. Nat. 

 from Eu. April-Sept. 



