BOTANY. 
CXC1 
Obs. Ad Deschampsiam proximo accedit hocce genus ; distinguitur perianthiis muticis, val- 
vulis integris nec dentatis. Cum Catabrosa, facie diversissima, convenit pluribus notis, 
differt glumis locustam subaequantibus, perianthiis basi breve barbatis. A Poa diversum. 
locustis haud 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 the genus Atriplex. 
63. Dupontia Fisheri. 
Desc. Gramen 6-1 0-unciale, erectiun. Culmi simplices, foliati, laeves, glaberrimi. Folia 
radicalia et inferiora culmi canaliculata, angusto-linearia, acuta, lcevia, 2-3-uncialia, vaginis 
strictis, scariosis, vix ad medium fissis ; culmea 1-2-superiora breviora, plana, lmvia, vaginis 
propriis laxiusculis foliaceis ultra medium fissis longiora : ligula mediocris, obtusa, subtrun- 
cata, imberbis. Panicula coarctata, spiciformis, basi quandoque interrupta, purpureo-fusca, 
nitens, sesquiuncialis — biuncialis, ramis subgeminatis, paucifloris, pedicellisque lsevibus cum 
locusta continuis. Locustce. ovatse, biflorte, cum rudimento clavato setuliformi tertii flosculi, 
nunc triflorse flore tertio completo, nunc bifloree absque tertii rudimento. Gluma bivalvis, 
subaequalis, mutica, glaberrima, purpurascens, subnitens, margine pallido scarioso, longitudine 
locustse. Valvule concavce nec carinatae, oblongo-lanceolatee, inferior paulo angustior, acu- 
minata v. acutissima, uninervis; superior semi-trinervis, medio paulo infra apieem 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, 
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 apieem desinente : superior longitudine inferioris, manifesto 
angustior, lineari-oblonga, glaberrima, dinervis, nervis brevibus, intersticio lineari concavi- 
usculo. Lodiculce duse, distinctee, collaterales, membranacese, hyalin®, subovatae, v. cuneat®, 
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 apieem 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 laevibus, locustis 
2-3-floris, arista stricta valvulam subsequante, foliis involutis : caulinis 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 brevissimum, vagina elongata, laxiuscula, 
Jigula breviore. Panicula coarctata, lanceolata v. oblonga, fusco-purpurascens, scariosa, 
ramis semiverticillatis. Locusta biflorse, raro triflorse, semper cum rudimento, pedicelli fonni 
