OF ARTS AND SCIENCES. 83 



New Mexico, Dr. J. T. Rothrock, in Wheeler's Expedition, ISTk In 

 aspect considerably unlike any other North American species : appar- 

 ently indigenous. 



Eriogonuji Greenei. Heterosepala inter E. proUferum et E. 

 ovalifoUum : niajusculum ; foliis oblongis acutiusculis ; scapo ultra- 

 sjjithamseo sub involucro priuiario sessili 3-radiato, radiis elongatis 

 involucra 1-3 turbiiuita (lin. 3 longa) gerentibus quandoque pro- 

 liferis ; perigouio albo (lin. 3 longo), segiuentis exteriuribus ovalibus 

 basi cordulatis per costam viridulana interioribus angustioribus baud 

 emarginatis longius adnatis. — Northern California, on rocky hills 

 about Yreka, E. L. Greene. Au interesting accession to the Hetero- 

 sepala section. 



OxYTHECA TRiLOBATA. Cymoso-raniosa ; foliis radicalibus brac- 

 teisque fere 0. Watsoai ; involucris longius pedunculatis pio genere 

 maximis alte 5-partitis nunc hinc divisis, phyllis patentibus foliaceis 

 oblongo-lanceolatis costa valida excurrente aristatis ; perigonii sepalis 

 ligulato-oblongis superne trifidis, lobis ovato-lanceolatis erosulis 

 acuminatis. — San Bernardino Co , S. E. California, Lenimon and 

 Parry. 



Chlor.ea Austins. Planta allia aphylla ; radicibus carnoso- 

 fibrosis ; caulibus fusciculatis (subpedalibus) laxe vaginalis ; spica ob- 

 longa laxiuscula ; floribus pro genere parvis albidis (perianthio parum 

 semipollicari) ; labello trilobo, lobo medio integerrimo transverse 

 oblongo ; anthera modo Cephalantherce substipitata. — Banks of a 

 wooded ravine iu the Sierra Nevada, California, near Quincy, in 

 Plumas Co., Mrs. R. M. Austin ; — whose zeal and services to botany, 

 and notably her observations upon the habits of Darlinytonia, render it 

 particularly proper that this remarkable plant of her own discovery 

 should commemorate her name. I refer it to the South American 

 genus ChlorcBa, rather than to the European and North Asian Cepha- 

 lanthera, on account of its habit, and because there is no articulation 

 between epichilium and hypochilium. 



POSTSCRIPT. 



Saxifraga chrtsantha. S. Hirculo et serpyllifoUce affinis : 

 caudiculis perennantibus caespitor^is diapensioideo-foliatis cum stolonibus 

 filiformibus ; foliis spathulatis seu lineari-spathulatis obtusissimis niti- 

 dulis glabris (lin. 2-3 longis) basi sensim angustatis sessilibus, caudi- 

 culorum crebre rosulato-imbricatis ; caulibus floriferis scapiibrmibus 

 fere bipoUicaribus 1— 4-foliatis 1— 2-floris glabris vel superne cum 



