OF ARTS AND SCIENCES. 213 



To this genus I propose to append an imperfectly known species, of 

 the southern borders of California, which has no pappus at all. It may 

 prove to be a state of a pappose species. 



A conspectus of the species, as now understood, is added in a note.* 



* MALACOTHRIX DC, Torr. & Gray. 



§ 1. Malacolepis Gray, PI. Fendl. Involucrum gradatim imbricatum pluri- 

 seriale, e squamis latissimis albo-scariosis, costa tantum viridi. Herba annua, 

 capitulis majoribus. 



1. M. CouLTERi Gray, 1. c. Eeceptaculum setis capillaribus persistentibus 

 inter flores onustum : ligulae forte flavidaj demum purpurascentes. Pappus ex- 

 terior e setis 1-2 validioribus Isevibus fere persistentibus. 



§ 2. Edmalaoothkix. Involucrum pauciseriale, e squamis angustis parum 

 scariosis. 



* Annuae, leptophyllffi, capitulis solitariis majoribus scapos simplices terrainan- 



tibus, involucri squamis gradatim imbricatis, floribus luteis. — Malacothrix 

 DC. 



2. M. Californica DC. Laxe lanosa, nunc glabrata. Pappus exterior 

 e setis 2 persistentibus cum denticulis nonnullis. 



* * Annuae, paniculato-ramosa, capitulis minoribus, involucro plerumque bise- 



riali, squamis interioribus squalibus, exterioribus paucis brevibus calyculum 

 referentibus, floribus pallida flavis deraum puCpurascentibus, foliis prasertim 

 radicalibus runcinato-pinnatifidis. — Leptoseris Nutt. 



•1- Pappus exterior e setis validioribus nudis sat persistentibus 1-8. 



3. M. ToREETi. Spithamaea ad sesquipedalem, fere glabra; ramis pedun- 

 culisque setis glanduliferis interdum parce munitis ; capitulis mediocribus vel 

 majusculis multifloris ; involucro campanulato ; achenio costis 5 subalato- 

 prominulis insigniter angulato, valleculis bicostatis ; pappo exteriori persistente 

 e setis validis 4-8 (saepius 5) denticulisque pluribus interjectis. — M. sonrhoides 

 Torr. in Stansbury, Rep. p. 392 ; Gray, PI. Wright, 2, p. 105, p. p. ; Eaton in 

 Bot. King, p. 201, non Torr. & Gray, El. —From Salt Lake, Utah (Stansbury, 

 S. Watson), to the western borders of Nevada (Anderson, S. Watson) ; and a 

 slender, narrow-leaved form in southern Utah, collected by Dr. E. Palmer and 

 Mrs. Thompson. 



4. M. Fendleri Gray, PI. Wright, 2, p. 104. Humilis, fere glabra ; involu- 

 cro campanukto; achenio nigricante cylindrico jequaliter 15-costato, apice 

 manifeste cupulato margine integerrimo; pappo exteriori persistente unisetoso. 

 — New Mexico and Texas, on the Rio del Norte from near Sante Fe (Fend- 

 ler) to El Paso (Wright) and still lower (Bigelow) ; also Guadalupe Canon, Capt. 

 Smith. 



5. M. Xanti. Sesquipedalis, glabra vel glabrata ; foliis fere omnibus radi- 

 caUbus runcinatis membranaceis ; caule scapiformi gracillimo polycephalo ; in- 

 volucro cylindraceo; achenio castaneo costis 15 obtusis striate ob 5 paullo 

 validiores angulato, apice cupulato obtuse 5-dentato; pappo exteriori e setis 



