OP ARTS AND SCIENCES. 31 



Brickellta Parrti. B. Galeottii affinis, inter B. CavaniUc&ii et 

 B. veroniccefoliam collocanda, frutescens, 1-3-pedalis, canescenti-tomen- 

 tulosa, baud glandulosa; ramis virgatis ; foliis plerisque alternis corda- 



tis vel subcordato-ovatis obtusis crenato-serratis supra scaberulis subtus 

 tomentosis reticulatis (semi-sesquipollicari et petiolo lin. 2-5 longo); 

 capitulis conferte paniculatis suberectis semipollicaribus pedicello sub- 

 sequilongis; involucro campanulato 15-20-fioro e bracteis cireiter 20 

 omnibus obtusis vel obtusiusculis, intimis linearibus glabris, exteriori- 

 bus ovatis oblongisque dorso puberis. — High mountains southeast of 

 San Luis, Aug. No. 3G3. The heads are intermediate in size and in 

 the involucre between B. Cavanillesii and B. veroniccefolia. I possess 

 no specimen of B. Galeottii (which Schultz Bip. took to be the Rosa- 

 lesia glandulosa of Llave and Lexarsa), with which this should be 

 critically compared. The pubescence is that of B. tomentella and of 

 the more downy forms of B. Cavanillesii. 



Gutierrezia Berlandieki. G. eriocarpce facie, magis panicu- 

 lata ; capitulis sparsis paullo minoribus ; involucro (lin. 2 longo) 

 subcampanulato e bracteis oblongis ; ligulis 9-15 sat longis ; acheniis 

 6ericeo-pubescentibus ; pappo (radii et disci) brevissimo (pilos achenii 

 parum superante) multipaleolato ; receptaculo parum pubescente. — 

 Near San Luis Potosi, Berlandier (No. 1298). and in Tamaulipas 

 (No. 926, 2316) ; near Saltillo, Gregg (No. 538) ; No. 370 and 367 

 of Parry and Palmer's collection from San Luis, where it abounds in 

 waste grounds and is used for brooms. A species which has long been 

 left doubtful and undescribed ; well marked by its pappus of 12 to 18 

 minute short paleae, which are slightly united at base, forming a crown 

 which barely equals or at length moderately exceeds the soft pubes- 

 cence of the achenium. 



Xanthocephaluji sericocarpum. E basi vix frutescente? 

 1— 2-pedale ; ramis gracilibus fastigiatis apice monocephalis ; foliis 

 (ramorum) angusto-linearibus integerrimis, inferioribus hirtello-ciliola- 

 tis ; capitulo subgloboso (lin. 3 longo) multifloro ; ligulis 10 oblongis 

 (sesquilineam longis) ; receptaculo demum conico ; acheniis pi. m. tetra- 



chartaceis 3-4-seriatim imbricatis, omnibus mucrone gracili attenuato-acumi- 

 natis, extimis ovatis, intimis lineari-lanceolatis (semipollicaribus et ultra) : 

 foliis alternis breviter petiolatis ovatis acutiusculis subserratis subcoriaceis 

 grosse reticulatis (1-2-pollicaribus) utrinque viridibus supra hispidulo-scaber- 

 rimis subtus ad venas venulasque hispidulo-scabris. — N. W. Mexico, in the 

 Sierra Madre ? Seemann. Not in the Botany of tlie Herald ; for the B. pendula 

 there enumerated is said to have monocephalous branchlets. Iu the form and 

 venation of the leaves it is not unlike B. Palmeri. 



