BOTANY. • 
CXCl 
Obs. Ad Deschampsiam proxime accedit hocce genus ; dlstlnguitur perianthiis muticis, val- 
vulis integris nec dentatis. Cum Catabrosa, facie diversissima, convenit pluribus notis, 
diffei’t glumis locustam subsequantibus, perianthiis basi breve barbatis. A Poa diversum 
locustis baud compressis, glumis perianthiisque concavis nec carinatis. Ad confirmandum 
genus caryopsis desideratur. 
This genus is named in honour of Monsieur Dupont, of Paris, author of a valuable essay 
on the Sheath of the leaves of Grasses, and of observations on tlie genus Atriplex. 
63. Dupontia Fisheki. 
Desc. Gramen 6-1 0-unciale, erectum. Cuhni simplices, foliati, laeves, glaberrimi. Folia 
radicalia et inferiora culmi canaliculata, angusto-linearia, acuta, laevia, 2-3-uncialia, vaginis 
strictis, scariosis, vix ad medium fissis ; culmea 1-2-superiora breviora, plana, laevia, vaginis 
propriis laxiusculis foliaceis ultra medium fissis longiora : ligula mediocris, obtusa, subtrun- 
cata, imberbis. Panicula coarctata, spiciformis, basi quandoque interrupta, purpureo-fusca, 
nitens, sesquiunciali-s — biuncialis, ramis subgeminatis, paucifloris, pedicellisque laevibus cum 
locusta continuis. LocustcB ovatse, biflorae, cum rudimento clavato setuliformi tertii flosculi, 
nunc triflorse flore tertio complete, nunc biflorae absque tertii rudimento. Gluma bivalvls, 
subaequalis, mutica, glaberrima, purpurascens, subnltens, margine pallido scaiioso, longitudine 
locustae. Valvulce concavm nec carlnatse, oblongo-lanceolatee, inferior paulo angustlor, acu- 
minata V. acutissima, unlnervis ; swperior semi-trinervis, medio paulo infra apicem lateralibus 
longe intra marginem evanescentibus. Perianthia subconformia ; inferius intra glumam sub- 
sessile, a pedicello brevissimo separabile ; superius cum apice paulo dilatato pedicelli brevis 
articulatum, facile solubile ; utriusque valvula inferior ovata mutica obtusa, vix unquam acuta, 
integTa, concava, ipsa basi pills brevibus strictis albis barbata, et a basi fere ad medium pilis 
brevioribus strictis subadpressis svd)sericea, trinervis, nervis lateralibus intra marginem eva- 
nescentibus, medio paulo infra apicem desinente : superior longitudine inferioris, manifeste 
angustior, lineari-oblonga, glaberrima, dlnervis, nervis brevibus, intersticio linear! concavi- 
usculo. LodiculcB duse, distlnctse, collaterales, membranaceee, hyalinse, subovata^, v. cuneatse, 
apice eroso-dentato, ovario longiores. Stamina 3, filamentis dlstinctis, capillaribus, antheris 
fusco-purpureis, linearibus utrinque bifidis. Ovarium ovale, glabrum. Stigmata 2, subses- 
sllia, hyalina, dense plumosa, ramis apicem versus brevioribus. 
Obs. The .specific name is that of Mr. Fisher, whose herbarium contained the most com- 
plete series of specimens of this grass, 
64. Deschampsia brevifolia, panicula coarctata lanceolata : pedicellis laevlbus, locustis 
2-3-floris, arista stricta valvulam subeequante, foliis involutis : caulinls abbreviatis. 
Desc. Gramen 3-5-unciale, glabrum. Culmi simplices, erecti, foliati. Folia Inferiora 
involuto-subulata, stricta, uncialia — sesquiuncialia ; vaginis strictis, folio brevioribus, ipsa basi 
Integra: ligula oblonga, lacinulata; supremum brevisslmum, vagina elongata, laxluscula, 
ligula breviore. Panicula coarctata, lanceolata v. oblonga, fusco-purpurascens, scariosa, 
ramis semiverticillatis. Locusts, biflorae, raro trifloree, semper cum rudimento, pediceUiformi 
