198 PROCEEDINGS OF THE AMERICAN ACADEMY 



SCHKUHRIA Roth. To tills genus Bahia pedata and B. hifernata 

 Gray, with annual root and costate pappus, are properly referred by 



parum minoribus ; pappo nullo. — Plilomeris {Ptilopsis) antliemoides Nutt. Ilymen- 

 oxys calva Torr. & Gray. 



3. A. MUTiCA. Prtecedenti simillima, nisi pappo e paleis 6-8 quadrato- 

 oblongis apice eroso-lacinulatis muticis, paucisve raro aristulatis. — Plilomeris 

 mulica Nutt. Hymenoxys Torr. & Gray. 



* * Subpiibescens, vix glandulosa ; ligulis brevioribus ovalibus 6-8 ; involucri 



squamis ovatis; receptaculo glabro. 



4. A. TENELLA. Omnibus partibus minor; pappo e paleis 5-8 quadratis 

 apice latissimo fimbriatis, paucisve nunc tenuiter aristulatis. — Ptilomeris tenella 

 & P. affinis Nutt. PI. Gamb. 



§ 2. EuACTiNOLEPis. Floccoso-lanata ; foliis plerisque alternis, paucilobatis 

 vel integerrimis ; ligulis pauciusculis obovatis. Involucruni angustum. Re- 

 ceptaculum aut convexum aut obtuse conicum. Pappus 8-15-paleatus vel 

 squamellatus. 



* Capitula parva sessilia vel folioso-bracteata ; ligulis (flavis) 5 vel paucioribus ; 



receptaculo tantum convexo ; antheris appendice ovato-lanceolata superatis; 

 pappo e squainellis angustis insequalibus sajpius 15, vel fl. disci nullo. 



5. A. MDLTiCAULis DC. Specimens collected by Professor Brewer have 

 pappus to the disk as well as ray-flowers. 



* * Capitula majora pedunculata; ligulis 6-8; receptaculo obtuse conico; 



antheris appendice tenera fere setiformi (modo Burrielice) superatis ; acheniia 

 omnibus papposis. 



6. A. Wallacei. Albo-lanosissima ; foliis obovatis spathulatisve apice nunc 

 3-lobatis ; styli ramis cono subulato superatis ; pappi paleis 8-10 brevibus ob'tusis 

 muticis enerviis. — Bahia Wallacei Gray in Bot. Whippl. p. 49; forma normalis 

 ligulis aureis. — Var. rubella, liguhs roseo-purpureis albisve. Bahia rubella 

 Gray in Bot. Mex. Bound, p. 95. 



7 A. LANOSA. Albido-lanata ; foliis linearibus srepissime integerrimis ; ligti- 

 lis albis vel roseis; acheniis gracillimis; styli ramis obtusis vel teuuissime 

 apiculatis ; paleis pappi 8 vel 10 biformibus, 4 vel 5 subulatis in aristam attenu- 

 atis, alternis minoribus vel brevioribus exaristatis. — Burrielia (Dichceta) lanosa 

 Gray in Bot. Whippl. p. 51. — In both these, and especially in the present 

 species, the scales of the iuvolucre each enclose a ray-achenium. 



§3. Eatonella. rioccoso-lanata, depressa; foliis (spathulatis integerrimis) 

 plerisque alternis sed confertis ; ligulis 8-9 parvulis. Receptaculum planum, 

 callosum. Antherae appendice latiuscula obtusa superatae. Achenia linearia, 

 compressa, faciebus planis nitidis, marginibus callosis villosissimis : pappus e 

 paleis hyalinis 2 ovatis in aristam productis. 



8. A. nivea. Burrielia nirea D.C. Eaton, in S. Watson, Bot. King, p. 174, 

 1. 18. — Achenia of the ray partly enclosed in the concave scales of the involucre. 



