United States species of Pancratium. 143 



1. Pancratium mexicanum. 



Bulbus stolonifer ; folia 6 — 8, lineari-lorata, obtusa, conca- 

 viuscula, medio aliquanto latiora, striata, dorso convexa, ecari- 

 nata, apice plana: scapus anceps, striatus, subglaucescens, 

 2 — 6 floras : germen ovato-trigonum, pyramidale ; tiihus sub- 

 trigonus, angulis rotundatis, virescens, striatus ; petala alba, 

 linearia, recta, concava, tubo longiora, exteriora canaliculata, 

 subtus virescentia ; corona alba, fundo subvirescente, plus minus 

 stellata, margine irregulariter eroso, utplurimum mucronibus 

 paucis acuminatis instructo ; filamenta e sinubus coronBe, in- 

 curva, alba ; ant]ier<z verticales flavse ; pistillum declinatum, 

 incurvum, filamentis longius, apice viride ; capsula dirumpens 

 et marcescens ante seminum maturationem : semina post cap- 

 sulae destructionem crescentia. 



a. Bulbus unum solum scapum edens : folia octo, sesquipe- 

 dalia : scapus 19 — uncialis : petala subhorizontalia : corona 

 primo expansa infundibuliformis, postea exacte rotata vel dis- 

 ciformis petalis triplo brevior. 



/3. Altior. Bulbus unum solum scapum edens : folia sex, 

 bipedalia, scapus 2 pedes et demi altitudine : petala horizon- 

 talia, aut etiam subdeflexa : corona infundibuliformis, interdum 

 exacte rotata aut disciformis, vix stellata, petalis plus triplo 

 brevior margine uno alterove mucrone acuminato instructo. 



y. Praecox. Bulbus scapos duos semper proferens : folia 

 sex, pedalia : scapus pedalis : petala expansa non rotata : co- 

 rona infundibuliformis, nunquam rotata, petalis semi brevior. 



^. Bulbus unum solum scapum edens, folia, sex, pedalia ; 

 scapus pedalis : petala expansa, subhorizontalia ; corona exacte 

 rotata, stellata dentibus erosis, petalis triplo brevior. 



This species is found on the banks of the rivers of Georgia 

 and Carolina, in places overflowed by the tide, but grows ex- 

 VoL. III. 1 9 



