272 GnAMirfEAB. OTACIITniUM. 



cayac, hcrharco - mcmbranaceae, inrcrior unincnis, 

 supcrior snljtrincrvis. 



Floscuhis inlcrior raasciilus, hivalvis : valvula in- 

 fcrior scu intcrior ovata , coniplicalo -carinata, oh- 

 tusiuscu]a, hcrhacca, suljtrincrvis^ supcrior scu cx- 

 tcrior cjustlcm longitudinis, at amplior, ilosculo her- 

 maphrodito a suo dorso applicata idcoquc ab al- 

 tcra ipsius floscuU vahula dchiscens, ohovata, cu- 

 culhita , hcrhacco-mcmljranacca, dorso profunde acu- 

 tecpic canahculato-ljipHcata, sccundum ncrvos ca- 

 rinalcs cihata, Jjidcntata, latcrihus vcnlricoso -rotun- 

 datis inferiorem vah^ulam laxc amplcctcns, quo spe- 

 cies hujus flosculi singuhiris cfficitur, Trifolium (piod- 

 dam lotoides acmulantis. Stamina tria, hrcvia : an- 

 thcrae yersatilcs, crassac, fusco-purpurcae. 



Floscuhis supcrior focmincus, masculo ahquanto 

 minor ct valvuhic cjus superioris sidco dorsali incum- 

 bens, bivalvis: vahula infcrior ghnnac supcriori ap- 

 posita, ovata , acutiuscula, lacvis, (trincrvis) , mar- 

 ginibus invohitis amplcctcns vahiilam supcriorcm ob- 

 longo-lanccolatam memhranaccam suhbidcntatam ob- 

 solcte bincrvem, quac ipsa marginihus pistillum in- 

 vohit; utraquc vahuha in fructum aJjit atque duratur. 



Lodicula simjjlcx, cmarginata, nuda, intcrpistil- 

 lum et yalvulam inferiorcm. 



Stamina ut in masculo. 



Ovarium lanccolatum, comprcssimi^ stylus basi 

 subbulhosus, profunde bipartitus, albus} stigmata 2, 

 aspcrgilliformia , purpurea. 



Observ. Proximum accedit hoc genus Isachne ge- 

 neri Brownii, sed difPert glumarum exiguitate et valvulae 

 superioris maseuU flosculi structura singulari. 



1. OTACHYRIUM JUNCEUM. f 



Panicum Pterygodium, Trin. IMoiiogr. ined. 



Radix caespitem protrudens , repens , ramis flagellifor- 

 mibus. Culmi conferti , erecti , simplices, filiformes, basi 

 subbulbosi, a spithama ad pedem alli, quadri-quinquenodes, 

 subgeniculati , striati nodisque glabri, inferne vaginis eniar- 

 cidis , superne foliis vestiti, sub panicula nudi ; nodi sericeo- 



