MONOCOTVr.KDON US. 229 



63. DUPONTIA FlSHEKI. 



Uesc. Gramen 6-10-unciale, erectum. Culvii simplices, 

 foliati, Iseves, glaberrimi. Folia radicalia et inferiora culmi 

 canaliculata, angusto-linearia, acuta, Isevia, 2-3-uncialia, 

 vaffinis strictis, scariosis, vix ad medium fissis ; culmea 1-2 

 superiora breviora, plana, Isevia, vaginis propviis laxiusculis 

 foliaceis ultra medium fissis longiora : lii/Hla mediocris, 

 obtusa, subtruncata, imberbis. Panicula coarctata, spici- 

 formis, basi quaiidoque interrupta, purpureo-fusca, nitens, 

 sesqviiuncialis — biuncialis, ramis subgeminatis, paucifloris, 

 pedicellisque Isevibus cum locusta continuis. Locusta> 

 ovatse, biflorse, cum rudiinento clavato setuliformi tertii 

 flosculi, nunc trifiorse flore tertio couipleto, nunc biflorse 

 absque tertii rudimento. Gluma bivalvis, subsequalisj mu- 

 tica, glaberrima, purpurascens, subnitens, tnargine pallido 

 scarioso, longitudine locustse. Valvules concavae nee cari- 

 natse, oblongo-Ianceolatse, inferior paulo angustior, acuminata 

 V. acutissima, uninervis ; superior semi-trinervis,medio paulo 

 infra apicetn lateralibus longe intra marginem evanescenti- 

 bus. Perianthia subconforraia ; inferius intra glumam 

 subsessile, a pedicello brevissimo separabile ; siqjerius cum 

 apice paulo dilatato pedicelli brevis articulatum, facile 

 solubile; utriusque valvula inferior ovata mutica obtusa, 

 vix unquam acuta, integra, concava, ipsa basi pilis brevibus 

 strictis albis barbata, et a basi fere ad medium pilis bre- 

 vioribus strictis subadpressis subsericea, trinervis, nervis 

 lateralibus intra marginem evanescentibus, medio paulo 

 infra apicem desinente : superior longitudine inferioris, 

 manifeste angustior, lineari-oblonga, glaberrima, dinervis, 

 nervis brevibus, intersticio lineari concaviusculo. Lodicidce 

 duse, distinctse, coUaterales, membranaceee, hyalinse, subovatse, 

 V. cuneatse, apice eroso-dentato, ovario longiores. Stamina 

 3, filamentis distinctis, capillaribus, antheris fusco-purpureis, 

 linearibus utrinque bifidis. Ovarium ovale, glabrum. 

 Stigmata 2, subsessilia, hyalina, dense plumosa, ramis apicem 

 versus brevioribus. 



Ohs. The specific name is that of Mr. Fisher, whose 

 herbarium contained the most complete series of specimens 

 of this grass. 



