OF ARTS AND SCIENCES. 39 



hardly at all striate ; the pappus is composed of very few and usually 

 coriaceous paleae ; some of which are apt to be aristiform, but none 

 setiferous. 



nophyllum capillaceum, DC. 1. c. 638, unless that should be the precedmg. A. 

 Porophyllum, Heiiisl. 1. c, in part. 



= = Styli rami in appendicem elongato-subulatam hirsutara sensim producti : 



folia vix setigera. 



D. POROPHYLLOIDES, Gray, PI. Thurb. 322, & Bot. Calif, i. 897. Caules 

 basi lignosi : folia o-5-partita, segmentis angustis dentibusque cum bracteis 

 involucri externi subulato-acutatis nee setiferis. — Southeastern California and 

 Arizona. 



D. CooPERi, Gray, Proc. Am. Acad. ix. 201, & Bot. Calif. 1. c. Caules basi 

 minus vel vix lignosi : folia omnia alterna, brevia, ovata ct sublanceolata, arete 

 sessilia, subspinuloso-dentata, nonnulla basi utrinque lobo parvo stipuliformi 

 instructa: capituliim poliicare, involucro 20-30-phylIo cum bracteis accessoris 

 parvis. — Southeastern California. 



§3. BcEBERA, DC. excl. sp. Capitula minora; involucro fere prascedentis ; 

 bracteis accessoriis subfoliaceis veras subaequantibus : styli rami fl. herm. cono 

 brevi nunc obtuso superati : corollae dentes breves ovati : receptaculum puberu- 

 lum : achenia puberula : herbae sa^pius pubescentes, foliis oppositis pinnatipartitis, 

 segmentis angustis plerumque dentatis vel incisis. 



* Herbae perennes (an semper?), capitulis mediocribus ramos terminantibus 



longius pedunculatis, ligulis exsertis conspicuis. 



D. T.\GETiFLORA, Lag. 1. c. ; Gra}', PI. Wriglit. i. 114. Caules elongati : pedun- 

 culi superne incrassati : involucrum glabellum, bracteis accessoriis lanceolato- 

 subulatis acutis. — Dahera fastigiata, HBK. Nov. Gen. & Spec. iv. 148. B. 

 tagetijiora, Spreng. Syst. DeCandnlle confounded this with his D. appendicu- 

 lata, at least in his herbarium, and referred the synonymous names to his D. 

 fastif/iata, which otherwise is D. chrysanthemoides. And Hemsley omits the 

 species, taking only partial note of the remarks in PI. Wrightiance. To this 

 belongs no. 2560 of Bourgeau. 



D. PUBESCENS, Lag. 1. c. Humilior, mox diffusa : pedunculi sursum vix in- 

 crassati : involucrum Scepius pubescens, bracteis accessoriis oblongo- sen lineari- 

 spathulatis obtusis. — Aslei- pimuitus, Cav. Ic. iii. 6, t. 212. Dysodia inlegerrima, 

 Lag. 1. c, a form with narrow subentire leaf-segments. Bachera incana, Lindl. 

 Bot. Reg. t. 1602. Dysodia incana & Cloinenocoma pinnata, DC. 



* * Herba annua, ramosissima, usque ad capitula parvula foliosissima; foliis 



majus divisis; ligulis parvis inconspicuis. — Bahcra, Willd. 



D. cnRYSANTHEMOiDES, Lag. 1. c, cum syn. DC. Prodromi. D.fastigiata, DC. 

 1. c, excl. syn. — Mississippi Valley to Mexico. 



§ 4. BcEBEEASTRDM. Involucrum laxius, depresso-hemisphsricum, simpli- 

 cissimum, e bracteis 8-9 obovatis membranaceis margine subscariosis ima basi 

 subincrassatis, accessoriis plane nullis : ligulae conspicua? rotundata: coroUse 

 disci lobis longiusculis : styli rami cono brevi acuto superati : pappi setae ratione 



