BOTANY. 
CXCl 
Obs. Ad Deschampsiam proxime accedit hocce genus ; distlnguitur perlanthiis muticis, val- 
vulis integris nec dentatis. Cum Catabrosa, facie dlversissima, convenit pluribus notis, 
differt glumis locustam subaequantibus, perianthiis basl breve barbatls. A Poa diversum 
locustis baud compressis, glumis periantbiisque concavis nec carinatis. Ad confinnandum 
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. Dupoxtia Fisheri. 
Desc. Gramen 6-1 0-unci ale, erectum. Cidmi simplices, foliati, Iseves, glaberrimi. Folia 
radicalia et inferiora culmi canaliculata, angusto-linearia, acuta, leevia, 2-3-uncialia, vaginis 
strictis, scariosis, vix ad medium fissis ; culmea 1-2-superiora breviora, plana, Itevia, vaginis 
propriis laxiusculis foliaceis ultra medium fissis longiora : ligula mediocris, obtusa, subtrun- 
cata, imberbis. Panicula coarctata, spiciformis, basi cpiandoque interrupta, purpureo-fusca, 
nitens, sesquiuncialis — ^biuncialis, ramis subgeminatis, paucifloris, pedicellisque Isevibus cum 
locusta continuis. Locusttz ovatee, biflorte, cum rudimento clavato setuliformi tertii flosculi, 
nunc triflorsB flore tertio complete, nunc bifloree absque tertii rudimento. Gluma bivalvis, 
subsequalis, miitica, glaberrima, purpurascens, subnitens, margine pallido scarioso, longitudine 
locustam Valvula concavte nec carinatee, oblongo-lanceolata, inferior paulo angustior, acu- 
minata V. acutissima, uninervis ; superior 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 valvida inferior ovata mutica obtusa, vix unquam acuta, 
integra, concava, ipsa basi pilis brevibus strictis albis barbata, et a basi fere ad medium pilis 
brevioribus strictis subadpressis subsericea, trinervis, nervis lateralibus intra marginem eva- 
nescentibus, medio paulo infra apicem desinente : superior longitudine inferioris, manifeste 
angustior, lineari-oblonga, glaberrima, dinervis, nervis brevibus, intersticio lineari concavi- 
usculo. Lodiculce duse, distinctee, collaterales, membranaceee, hyalinse, subovata^, v. cuneatcJe, 
apice eroso-dentato, ovario longiores.^ Stamina 3, filamentis distinctis, capillaribus, antheris 
fusco-purpureis, linearibus utrinque bifidis. Ovarium ovale, glabrum. Stigmata 2, subses- 
silia, 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 leevibus, locustis 
2-3-floris, arista stricta valvulam subaequante, folds Involutis : caulinls abbreviatis. 
Desc. Gramen 3-5-unciale, glabrum. Culmi simplices, erectl, foliati. Folia inferiora 
involuto-subulata, stricta, uncialia — sesqulunclalia ; vaginis strictis, folio brevioribus, ipsa basi 
integra: ligula oblonga, lacinulata; supremum brevissimum, vagina elongata, laxiuscula, 
ligula breviore. Panicula coarctata, lanceolata v. oblonga, fusco-purpurascens, scariosa, 
ramis semiverticillatis. Locusta biflorse, raro trifloree, semper cum rudimento, pedicelliformi 
2 o 
/ 
