OF ARTS AND SCIENCES: JANUARY 26, 1870. 155 



stipitera cum pedicello articulatum longe produdtus. Perennia, 

 caulibus foliatis famosis, foliis aut alternis aut verticillatis subtus 

 (nunc fulvo- srepius cano-) tomentosis, involucris solitariis plerum- 

 que sessilibus. 



* Folia angusta (lanceolata seu oblongo-linearia), inferiora in petio- 

 lum attenuata, omnia cum rami's inferioribus paniculae apertae nudse 

 alterna. Involucra subdissita, inferiora pi. m. pedunculata. Peri- 

 gonia herbacea, segmentis eonsimilibus. 



4. E. LONGiFOLiusi, Nutt. E. Texanum, Scheele in LinnaBa. — Ar- 

 kansas. Texas, and rare in Florida. Stems 2-4 feet higb from a 

 thickened root. 



* * Folia caulina 3 - 5-natim verticillata, ovalia seu oblonga : cyma 

 dicbotoma, foliata, involucris in dichotomiis vel secus ramos sessili- 

 bus multifloris. Perigonia subpetaloidea, alba, segmentis 3 interi- 

 oribus sa^pius demum longioribus. 



5. E. tomentosuji, Michx. Fl. 1, p. 246, t, 24. Caulibus 2-3- 

 pedalibus foliosis ; foliis caulinis sessilibus obovatis seu ovalibus subtus 

 toraento sospissime fulvo vel rufo ; perigonii segmentis late ovatis extus 

 tomentosis margine lato albo, tubo pedicelliformi elongate — Pine bar- 

 rens from South Carolina to Florida ; the original species, and, with 

 the rare exception of the foregoing, the only one met with east of the 

 Mississippi. 



6. E. tjndulatum, Benth. in DC. 1. c. p. 7. Mexico, Nee, Galeotti. 

 Known only from imperfect specimens. Apparently dwarf and fruti- 

 culose, with much smaller flowers than in the foregoing ; the leaves 

 undulate-crisped. 



7. E. Jamesii, Benth. 1. c. E. sericeum, Torr., non Pursh. Caulibus 

 5 - 12-pollicaribus e caudicibus lignescentibus caespitosis parce foliatis; 

 foliis caulinis spathulatis oblongisve subsessilibus, tomento albido ; in- 

 volucri extus laxe villoso-sericei segmentis obovatis vel spathulatis. 

 — From the Platte to W. Texas and New Mexico. 



§ 3. Umbellata, Benth., excl. sp. pluribus. Flos (ut in § 2) in- 

 ferne in basim angustam sa3pi>sime quasi in stij)item cum pedicello 

 articulatum productus ! Involucra multiflora, nunc solitaria (raro 

 pauca in capitulum), nunc in umbellam simplicem vel compositam 

 pedunculum ramosve floriferos terminantes, collecta. Ovarium 

 inferne glabrum, superne plerumque parce hirsutum. Embryo 

 curvulus vel fere rectus ; radicula breviuscula seu longiuscula, 



