VI. PLANTS WRIGHTIAN.E. 79 



lowing plant, however, with much the habit of an enlarged Gjinnosperma, has 

 short and broad appendages to the style. Yet I cannot separate it from the genus 

 Gutierrezia. 



GJ. (Hemiachtris) gtmnospermoides (sp. nov.): caule hcrbaceo valido subsim- 

 plici; foliis lanceolatis vel oblongo-lanceolatis inferne attenuatis apicem versus 

 ssepius denticulatis mucronato-acutis glutinosis penninerviis ; capitulis confertissime 

 coryrabosis hemisplurricis fere omnibus pedicellatis ; involucri squamis linearibus 

 acutis ; receptaculo planiusculo ; ligulis 25 - 30 angustis discura vix superantibus ; 

 fl. disci 40 - 60 ; acheniis radii glaberrimis calvis, disci minute hirtellis pappo co- 

 roniformi dentato lacero et in fl. centralibus setoso-paleaceo superatis. — Low banks 

 of the San Pedro, Sonora; Sept. (1178.) — " Stem 2 to 4 feet high," very leafy to 

 the top, terete. Leaves about 3 inches long, 4 to 6 lines wide, rather thin, rather 

 obscurely feather-veined. Heads very numerous, cymose-crowded at the summit of 

 the stem and of the short flowering branches, forming an ample compound corymb. 

 Involucre glutinous, hemispherical, about 3 lines in diameter ; the scales with loose 

 or spreading tips. Receptacle nearly flat, alveolate. Ligules linear-oblong, not 

 longer than their filiform tube. Appendages of the style in the disk-flowers ovate- 

 triangular, acute. Achenia oblong, compressed ; those of the ray perfectly glabrous, 

 with a small terminal areola, entirely destitute of pappus ; those of the disk mi- 

 nutely and sparsely hairy, with a toothed and lacerate coroniform pappus, which 

 in the exterior flowers is very short, or sometimes obsolete, in the central flowers 

 larger and often produced into 4-8 unequal rigid setiform palese, the larger occa- 

 sionally nearly as long as the achenium. 



G. (Hemiachtris) sph^rocephala, Grat/, PL Fendl. j)- 73. Banks of the Rio 

 Grande near El Paso ; June, in flower. Hills near the copper mines, New Mexico ; 

 Oct. (1179.) — Root annual! Stems a span to a foot high, difl'usely very much 

 branched, bearing very numerous solitary heads ; the upper leaves reduced to subu- 

 late bracts. Heads 2 lines in diameter. Achenia turbinate, silky-villous, especially 

 on the 10 strong ribs. Pappus in these specimens all truly coroniform, as long as 

 the proper tube of the disk-corollas, fully half the length of the achenium, irregu- 

 larly 4 - 5-lobed or toothed ; the lobes mostly obtuse, short, erose. — Those from 

 the copper mines are well-developed specimens of the same plant as Fendler's No. 

 343, which was immature. No. 315 of Coulter's Mexican collection may be a 

 variety of this, with the paleas much less concreted. G. eriocarpa diflcrs princi- 

 pally in the multipaleate pappus. 



G. MicROCEPHALA, Gfaj/, PL Fendl L c, S,' PL Wright, p. 94. Mountains at Gua- 

 dalupe Pass, New Mexico ; Oct. (1180.) 



S. MOLLIS, BartL Ind. Sem. Ilort. Ga'tt. 1836 ; DC. Prodr. 7. ji- 279. S. incana, 

 Torr. %■ Gray, FL 2. p. 221 (a & /3). Sides of mountains at the copper mines, 

 New Mexico; Aug. and Oct. Also on the Linipio. (1181.) — It runs, I fear, 

 into S. nemoralis, and certainly is not distinct from S. nemoralis y, Torr. S,- Gray. 



S. PETioLARis, Ait. ; Torr. 8r Gray, L c. ; at least the plant of PL Wright, p. 94. 

 With the preceding. (1182.) 



S. occiDENTALis, Niitt ill Torr. S>- Gray, FL 2. p. 226. Thickets, in the bottom 

 of the Mimbres, New Mexico ; Oct. (1183.) 



