68 PROCEEDINGS OP THE AMERICAN ACADEMY 



basi sat lata gradatim attenuatis viscldo-puberulis ; corolla ultrapolli- 

 cari pallide purpurea supra calycem subito inflata campanulata, labio 

 intus vix barbato ; filaraento sterili minus quam in P. cristato barbatis. — 

 Eastern side Rocky Mountains and vicinity, to New Mexico (575, 579, 

 Fendler) and the adjacent parts of Texas. Nearest to P. cristatus, 

 from which it plainly differs in the narrower leaves, more abruptly 

 ampliate corolla, shorter and less abundant beard, and the calyx more 

 viscid-puberulent, as in P. albidus. 



h. Foliis latioribus ssepius serratis, caulinis plerisque amplexicaulibus ; 

 panicula vulgo nuda laxiflora. 



39. P. CoB^A, Nutt. Pedalis, raro bipedalis, viscoso-puberulus ; 

 foliis ovatis oblongisve argute serratis vel denticulatis ; panicula pauci- 

 flora cum sepalis oblongis vix acutis viscoso-pubescente ; corolla bi- 

 pollicari ex albido purpui'ascente supra calycem subito inflata late 

 campanulata intus glabra. Kansas to Texas. (142, Lindheimer ; 

 577, Fendler; 1834, Berlandier, depauperate.) 



40. P. Digitalis, Nutt. Elatus (3 - 5-pedalis), pra;ter flores pi. m. 

 viscosos sa^pissime glaberrimis ; foliis tantum serrulatis, caulinis 

 (3 - G-pollicaribus) lanceolatis vel superioribus ovato-lanceolatis e basi 

 lata sursum sensim attenuatis ; thyrso nudo laxo plurifloro ; corolla 

 ultrapollicari alba superne e tubo angusto campanulato-ampliata, lobis 

 brevibus subaequalibus, filamento sterili parcius barbato. — Illinois to 

 Arkansas, Louisiana, and Georgia. 



^. MULTiFLORTJS, Chapman, Fl. (P. multijiorns, Chapm. ined. P. 

 crassifolius, Shuttlew., fide Benth.) is I suppose rightly placed by Dr. 

 Chapman under this species, — a form from the pine barrens of Florida 

 and Georgia, with the corolla smaller and narrower, less abruptly 

 ampliate. But I have not seen sufficient materials. 



41. P. TUBiFLORUS, Nutt. — judging from the insufficient specimens 

 cited in the Prodromus (from Herb. Torr.), where the name of "Engel- 

 man " should be Leavenworth — is probably a slender variety of P. 

 Digitalis, with the corolla less ampliate, tubular-funnel-form, and the 

 sterile filament less bearded. But sufficient materials ai'e not in hand. 

 — Arkansas. 



++++ Filamento sterili longitudinaliter saltem secus apicem dilatatum 

 flavo-barbato ; corolla minus ampliata (P. glauco excepto) evi- 

 dentius bilabiata. Gismontani vel montani ; inflorescentia baud 

 glomerato-condensata. 



