624 PROCEEDINGS OF THE AMERICAN ACADEMY 



cies, that, althouch the differences are constant so far as yet observed, 

 it may confidently be inferred that one has been derived from the 

 other. 



In T. microcephalum, Pursh, well-developed heads show a receptacle 

 bearing the flowers in three verticils. 



Astragalus lentiginosus (Dougl., Gray, Rev. Astrag., p. 194), 

 var. FLORiBUNDUS : subglaber ; caulibus productioribus (pedalibus) 

 adseendentibus e pleris axillis floriferis ; pedunculis breviusculis spicato- 

 plurifloris ; floribus albis nunc apice purpureo tinctis ; leguminibus 

 junioribus rectis acutissime acuminatis glabris. — Nevada, near Carson 

 City, Dr. C. L. Anderson. Flowers and legumes considerably smaller 

 than those of the nearly allied A. diphysus, the teeth of the cylindra- 

 ceous calyx shorter. The mature legumes in one specimen are some- 

 what mottled. 



Astragalus Andersonii : undique pube molhssiraa subvillosa 

 canescens ; caulibus e radice perenni adsurgentibus (pedalibus) foliosis ; 

 stipulis discretis triangulari-lanceolatis ; foliolis 7-12-jugis ovalibus 

 oblongisve rarius obovatis ; pedunculis folium superantibus ; spica cy- 

 lindrica vel oblonga densius multiflora ; calycis dentibus setaceis tubo 

 campanulato subsequilongo corolla caerulescente dimidio breviori ; legu- 

 mine oblongo-lineari (semi-sub-pollicari) chartaceo-coriaceo tomentu- 

 loso arcuatim incurvo subcompresso dorso sulcato septo ad suturam 

 ventralem intruso bilocellato 12-20-spermo. — Near Carson City, Ne- 

 vada, Dr. C. L. Anderson (18G3 and 1864). A soft-downy and hoary 

 species, not particularly related to any other North American species 

 known to me, but with much the aspect of A. chcetodon Torr.,* of the 

 same region farther north. Leaflets 3 or 4 lines long. Flowers of 

 about the same length, usually crowded in a spike of one or two inches 

 in length (in fruit from 2 to 6 inches ; the pedicels very short. Bracts 

 setaceous, equalling the calyx tube. Corolla apparently ochroleucous 

 tinged with blue or purple, becoming white or yellowish. Flowers 

 more or less deflexed after anthesis. So are the pods, which curve 

 upwards or are almost hamate when fully ripe. They are not at all 

 stipitate. Seeds small. 



♦ Vide Gray. Rev. Astrag. p. 194. The specific name chatodon being preocca- 

 picd by Bunpc, this may he named, in honor of the discoverer, the Rev. Mr. 

 Spalding, A. Spaldingii. 



