358 PROCEEDINGS OF THE AMERICAN ACADEMY 



Burrielia (Dich-eta) maritima: arenoso-pubescens, moxglabrata; 

 caulibus diffusis ; foliis oblongo-linearibus integerrimis trinervulis ; 

 pedunculis folia paullo superantibus ; involucri squarnis ovali-oblongis 

 G-8; ligulis totidem brevissimis ; corollis fl. disci (circiter 20) fauce 

 campanulata ; acheniis oblongo-linearibus pubescentibus ; pappi aristis 

 3-5 scabris achenio paullo brevioribus setulisque plurimis interjectis. 

 — On the Farallones, rocky islets off San Francisco, Mr. F. Gruber. 

 A span high : leaves an inch long: head 4 lines long: the broad ligules 

 barely equalling the disk. 



Leptosynne Newberryi : L. Douglasii facie, stylis, etc. ; tubo 

 corollarum brevioribus annulo barbato inconspicuo ; acheniis ala lata 

 tenui laevi cinctis (corona obsoleta) fere epapposis. — Sitgreaves Pass, 

 Arizona or New Mexico, Dr. Newberry. Camp Grant, Arizona, Dr. 

 Edward Palmer. There are no capitate hairs or glands on the broad 

 and thin wing of the achenium, but some very short ones on the dorsal 

 face of its body. The flowers are intermediate between L. Douglasii 

 and L. StiUmanii. 



Leptosynne maritima = Tuchermannia maritima, Nutt. The 

 characters upon which Nuttall's genus rested, never strong, are now 

 quite invalidated. 



Riddellia Cooperi : ramosissiraa (bipedalis, basi frutescens ?), 

 lana a'ppressa canescens ; foliis augusto-linearibus integerrimis (imis 

 ignotis) ; pedunculis ramos terminantibus solitariis monocephalis gra- 

 cilibus ; ligulis saepius 4 ; pappi paleis oblongis aut integris aut eroso- 

 laceris corolla disci et achenio glabro 2 - 3 -pip brevioribus. — Gravelly 

 banks at Fort Mohave, Dec. 1861, Dr. J. G. Cooper. On the Colo- 

 rado, Dr. Newberry. Camp Grant, &c, Arizona, Drs. Elliott Coues 

 and Edward Palmer. In Dr. Cooper's and Dr. Newberry's speci- 

 mens only are the palese of the pappus somewhat laciniate, making an 

 approach to R. aracltnoidea, the Psilostrophe of De Candolle's incertce 

 sedis, — a name which, although a year or two earlier in publication, 

 we trust may remain disused, having been accompanied by an insuffi- 

 cient, and, in some important respects, erroneous character. 



Helenium Bolanderi : tomentuloso-pubens, mox glabrescens ; 

 caule valido (pedali ad sesquipedalem) apice aphyllo monocephalo rari- 

 usve ramoso 2 - 3-cephalo ; foliis ovatis obovatis vel spathulato-lance- 

 olatis integerrimis ima basi 5 -7-nervatis in caulem pi. m. decurrentibus, 

 imis in petiolum angustatis ; capitulo pro genere maximo ; ligulis pluri- 

 mis aureis disco subgloboso sequilongis involucro multo longioribus ; 



