220 PROCEEDINGS OF THE AMERICAN ACADEMY 



conuatis ; ligulis majusculis (lin. 4 loiigis) ; receptaculo convexo ; pappi 

 palcis obloiigis sajpius obtusis enerviis corolla disci vix dimidio brevi- 

 oribus. — New Mexico, in the Organ Mountains, G. It. Vasey, 

 August, 1881. 



Artemisia Parishii. Seriphidiu7n, frutescens, 3-4-pedalis, to- 

 mento minutissimo undique canescens ; foliis (plerisque sesquipollicari- 

 bus) aut linearibus integerrimis (lineam latis) aut inferioribus apice 

 dilatato tridentatis ; panicula ampla laxa, ramis gracilibus polycephalis ; 

 capitulis (lin. 2 longis) 6-7-floris ; iuvolucro campanulato ; acheniis 

 utriculatis glandulosis et pilis arachnoideis parce villosis. — Newhall, 

 Los Angeles Co., and in Cajon Pass, California, Oct. 1881, coll. 

 S. B. Sf W. F. Parish. It has the habit and ample paniculate in- 

 florescence of A. Palmeri. 



Senecio Lemmoni. Frutescens, parum succulentus, ramosissimus, 

 tomento arachnoideo parco mox delapso glaberrimus ; foliis lanceolatis 

 argute dentatis vel denticulatis (summis linearibus integerrimis), imis 

 in petiolum marginatum attenuatis, superioribus basi auriculato-dilatatis 

 amplexicaulibus, auriculis spinuloso-dentatis ; ramis floridis apice 

 nudis ; capitulis pauciusculis longius pedunculatis ; involucre parum 

 bracteolato ; ligulis circ. 12. — Near Camp Lowell and Sta. Catalina 

 Mountains, S. Arizona, Lemmon, 1880 & 1881. Not much like any 

 other North American species. 



Cnicus Rothrockii. C. Arizonicce similis, ramosior; caule foliis- 

 que glaberrimis Isevibus, vel ramis nunc pilis crispulis parce pubescen- 

 tibus ; involucri bracteis primum laxe lanulosis. O. Arhonicus, var., 

 Rothrock in Wheeler Rep. vi. 179. — Central and Southern Arizona, 

 Rothrock, 1874, Lemmon, 1881. 



HECASTOCLEIS, Nov. Gen. Comp.- Mutisiacearum. 



Capitula uniflora : flos hermaphroditus. Involucrum cj'lindraceum, 

 e bracteis pauciseriatis imbricatis angusto-lanceolatis subherbaceis rigidis 

 cuspidatis. Receptaculum parvum nudum. Corolla fere coriacea, 

 tubulosa, angusta, regularis, limbo baud ampliato in lacinias 5 a?quales 

 lineares mox recurvo-patentes fisso. Antherte lineares, subcoriacea^, 

 basi in caudas sat longas nudas productaj. Stylus integer, apice stig- 

 matico truncate parum emarginato. Achenium immaturum cylindra- 

 ceum, glabrum. Pappus coroniformis, laciniato-deutatus, corueus. — 

 Frutex ramosus, glaber ; ramis rigidis foliosis; foliis alternis et in 

 axillis fasciculatis coriaceis, caulinis llneari-lanceolatis plerumque cus- 



