OF ARTS AND SCIENCES. 393 



Pectis Berlandieri, DC? var. Palmeri. Pecliinculis sparsis 

 longioribus quaudoque poUicaribus ; pappi setis 2-3. — South of Bato- 

 pilas, Palmer, 61. 



Pectis stenophylla. Pectothrix, P. longipedi quoad flores per- 

 similis, e basi suflfrutescente ramosissima, diffusa, subpedalis ; ramis 

 gracillitnis foliosis ; foliis angustissime linearibus tenuibus ; peduiiculis 

 capillaribus sesquipollicaribus ; involucro (lin. 2 alto) angusto circa 

 8-phvllo 15-18-floro ; ligulis 8. — Hillsides near Batopilas, Pa//«er, 

 81. Pappus of P. longipes, or the awns of the ray-flowers stouter. 



Artemisia redolens. Dracunculus, e radice perenni ultrapedalis, 

 quoad surculos radicales cano-tometitulosa, costerum viridis glabella vel 

 glabra ; foliis tenuibus 3-5-partitis iu segmenta liuearia (vix ultra-semi- 

 poUicaria) subintegra ; capitulis sesquilineam longis paniculatis erectis ; 

 involucro glabro ; acheniis pallidis opacis costato-striatis. — Chihuahua, 

 on cool slopes under cliffs, Primjle, 296. Bears some resemblance to 

 A. dracunculoides ; " has a powerful odor like that of A. Absinthium^ 

 but stronger, which burdens the air of the whole hillside." 



Senecio Hartwegi, Benth. PI. Hartw. 18; Gray, Syn. Fl. i.^ 

 386. Mountainous district, 150 miles north of Batopilas (therefore 

 not far from where it was collected by Wislizenus), Palmer, 366. 



Perezia platyphylla, Gray, PI. Fendl. lll,& Proc. Am. Acad, 

 xix. 61. Santa Eulalia Mountains, Chihuahua, Privgle, 583. At 

 Yerba Buena, Chihuahua, about 7,000 feet above the sea, Palmer, 

 299. The round leaves maintain the character of the species, as 

 founded on the specimen gathered by Wislizenus in this region. 



Perezia Thurberi, Gray, Mem. Am. Acad. v. 324, & Syn. FI. 

 i.^409. Rocky hills near Batopilas, Palmer, 212. 



Perezia paniculata. Scabrido-puberula ; caule elato ramoso ; 

 foliis (inferioribus ignotis) chartaceo-membranaceis (3-4-pollicaribus) 

 lanceolatis acutis deorsum angustatis basi acutis subsessilibus penni- 

 nerviis venuloso-reticulatis subintegerrimis ; panicula floribunda laxa ; 

 capitulis pro genere parvis ; involucro campanulato (lin. 2-3 longo) 

 10-12-floro, bracteis 3-4-seriatim imbricatis coriaceis acutis vel apicu- 

 latis margine villosulis, versus apiceni viridibus vel purpureo tinetis, 

 extimis ovatis, intimis lineari-oblongis. — Mountains above Batopilas, 

 at the Frailes, about 7,000 feet above sea level, Palmer, 279, 



Loheliacecc. 

 LoRF.LiA GRACILENS. Z. /7?-?A/«<y, Cav. proxima ; radicibus fascicu- 

 latis incrassatis ; caulibus 1-2-pedalibus gracillimis ; foliis radicalibus 

 rosulatis angusto-spathulatis (poUicaribus), caulinis linearibus angustis- 



