Tab. iS/. GTENIUM brachystachyum. 



Culmis csespitosis, simplicibus , glabris^ foliis anguste linearibus, sulcato- 

 stnatis, rigidis, scabris^ spica falcata; spiculis quinquefloris ^ gluma superiore 

 tnnervia^ bifida, aristata, nervis tuberculatis ; floribus duobus inferioribus bre- 



viter aristatis. 



Campulosus brachystachyus Nees ah Esenb. Agrostogr. Brasil 4iy. 



Crescit in Brasilia. % 



Radices fillformes, firmae, subflexuosae, fuscescentes , glabrae. Culmi caespitosi, simpl 



pergraciles, trinodes 



laeves, nitiduli, glabri, flavidi, iS-a^-pollicares. Folia 



radicalia igne absumpta \ culmea anguste linearia , plana , sulcato-striata , membranacea , rigida, 

 utrinque scabra, quadri-vel qiiinque pollicaria, | llneae lala. Vaginae teretes, usque ad basim 

 fissae, suIcato-striatGe , scabriusculae , internodiis mullo breviores, i |-2i-pollicares j nodis im- 

 berbibus, Ligula albreviata, rotundata, membranacea, glabra. Spica terminalis, falcata, basi 

 nodosa et villoso-barbata , i5-i6 lineas longa, Rhachis scabra, externe convexo-subcarinata, 

 interne subcanahculata, Spiculae unllaterales , dense imbrlcato-blseriataj , sessiles, duas lineas 

 longae, quinqueflorse j flores disticho-imbricati ; duo inferiores unipaleacei^ neutri; tertius bipa- 

 leaceus , hermaphroditus ; ex duobus superionbus pediceUatis inferior bipaleaceus , masculus v. 

 neuter, superior unipaleaceus , neuter, Glumae duae, valde inaequalesj iuferlor (interior) ovata, 

 acuta, uninervia, membranacea, glabra, carlnato-concava , ad nervum prominentem tuberculis 

 hyahnis dense obslta, superiore quadruplo quintuplove brevior j superior (exterlor) subinaequi- 

 latero-oblonga , apice bifida, concava, dorso medio aristata, trinervia, si 



bcoriaceo-membra 



cea externe scabra, nervis prominentibus tuberculatis, fiiscescenti-viridis, floribus paulo brevior \ 

 lobis ovatis, obtutiusclulis , inae qualibus 3 arista scabra, adscendente, apicem glumae haud attin- 

 sente. Flos infimus unipaleaceus, neuter : Palea Unearl-lanceolata , sub apice bifido arlstata , 

 lobis acutiusculis , trinervia, carinata, nervis lateralibus marginem paleae constituentlbus, mem- 

 branacea, eluma superiore paulo brevior, dorso margineque pilis longis strictis albis dense 

 obsita, apicem versus scabra^ arista scabra, palea dimidio brevior, subadscendens. Flos secun- 

 dus mox descripto slmillimus nisi paulo longior, interdum (teste Neesio ab Esenb. ) masculus 

 et bipaleaceus , palea superiore duplo trlplove breviore, bidentata vel bipartita. Flos tertius 

 bipaleaceus, hermaphroditus : Palea inferior elUptico-oblonga, sub apice emarginato mucro- 

 nato-aristata , trinervia, trlgono-carlnata , mcmbranacea, nervis lateraUbus cum margine con- 

 fluentibus , externe scabriuscula , ad marglnem pilis longis strictis albidis obsita ; arista brevis- 

 sima recta, scabra. Palea superior paulo brevlor, spathulato-lanceolata, apice blfida, lobis 

 acutatls binervia, marginlbus inflexis bicarinata, membranacea, externe scabra, ad carinas 

 pilis longis strictis albis obsita. Squamulae duae, subdolabriformes, carnoso-membranacea?, hya- 

 linae, glabrse. Stamlna tria, hypogyna. Antherae in specimine nostro delaps». Ovarium fecun- 

 datum clavato-oblongum, brevissime pedicellatum, glabrum. StyU duo, terminales, distantes, 

 Stiemata penicilUformia 3 piUs simpUcibus, denticulatis , elongatis. Caryopsis tereUuscuIo- 

 oblonga, apice rotundata, basi acuta, fusca, opaca, glabra, palels obtecta, Ubera, ad ba- 



ii5 



