Tab. 



116. PANIGUM OBTUSUM. 



Culmis compressis nodisque glabris^ foliis planis , margine serrulato-scabris, 

 supra puberulis; spicis 4-^ , racemosim dispositis , alternis , distantibusj spiculis 



gemmis 



> 



unilateralibus 



9 



subquadrifariam imbricatis , elliptico-obovatis 



> 



obtusis 



? 



glabris5 glumis inaequalibus 5 inferiore 5-, superiore 7-nerviaj flore masculo bipa 

 leaceo^ bermapbrodito ovato-elliptico, laevi. 



Panicum obtusum Humh. ef Kunth JSova Genera /. p. g8. 



/- 



Crescit in planitie montana regni Mexicani ^ 

 locis humidis, altitudine 1080 hexapodarum. iii. Floret septembri. 



prope 



Guanaxuato et Burras 



? 



Culmi 



ipito 



ferne ramosi, erecti, pedales, compressi^ sulcato 



glabr 



Nodi 



mar 



imberbes. Folia linearia^ acutata, plana, striata, subtus glabriuscula , supra puberula, rlgida, 



serrulato-scabra , 1 |-4-polIicaria, sesquillneamlata. Vaglnaecompresso-earlnatae, usque 



sub- 



, dis- 

 altera 



ad basim fissae, striatae, glabrae; inferiores internodils breviores. Ligula membranacea^ 

 truncata, glabra. Spicae quatuor vel septem^ racemoslm dlspositae^ subsesslles, alternae 

 tantes, adpressae vel patentes, 7-9 lineas longge. Spiculae geminae, altera subsessllls. 



pedlcellata, alternae^ unilaterales, subquadrifariam imbrlcatae, elllptlco-obovatae, obtusae 



qullineam longae ; pedicellis brevibus, puberuHs. Rhachls communls trlquetra 



9 



glabr 



2 



poIUcaris; partlales trlquetrae, flexuosae, puberulae. Glumae duae, herbaceae, concavae, glabroe 

 albidae, concavae, obtusae , inaequales ; inferior | brevlor , subrotundo-ovata , 5-nervIa, 



nervis 



vlridibus, inaequaliter distantibus, sub aplce glumae confluentlbus ; gluma superlor latlsslme 

 obovata, septemnervia , nervis inaequidlstantlbus , virldlbus , infra apicem glumae confluentibus . 

 Flos inferior masculus^ blpaleaceus, glumam superiorem vlx superans : Palea Inferlor herbacea, 

 latisslme elliptlca, obtusa, concava, sexnervla, alblda, glabra, nervls inaequidistantibus , viridi- 

 bus , sub apice paleae confluentibus j palea superior paulo longlor, elliptlca, apice rotundata , 

 biner via , hy allno-membranacea , plana , marginlbus inflexis ^ latis , inferne subauriculatis, angulis 

 nervo percursis^ membranaceo-subulata , glabra. Squamulae duae, coUaterales, antlcae, carnoso- 

 membranaceae , truncatae, glabrae. Stamina tria, hypogyna, ut in flore hermaphrodito. Pistilli 

 rudimentum nuUum. Flos hermaphrodltus vlx brevlor, ovato-ellipticus , obtuslusculus^ externe 

 convexus, interne planiusculus,, glaber^ albidus^ laevls, sub lente subtilisslme reticulato-tessella- 

 tus. Paleae coriaceo-chartaceae j inferior late elliptlca, obtusiuscula, ^-nervia, nervis inaequi- 

 distantibusj palea superior vis brevior^ elliptlca, acutluscula, binervia, dorso planluscula^ mar- 

 ginibus tenuioribus, medio latiorlbus, inflexis genitalia amplectens^ angulis obtusis. Squamulae 

 duae, antlcae^ coUaterales, carnosae, cuneatae, apice truncato-Iobatae^, glabrae. Stamina trla, 

 hypogyna, duo lateraUa, unum anterius. Filamenta fiUformia, glabra. Antherae Unearl-oblongse, 

 utrlnque bifidse , biloculares, glabrae, clnnamomeo-fuscae , secundum totam longitudlnem de- 

 hiscentes. Ovarium sessile, oblongum, glabrum, apice inter stylos aplcatum. StyU duo, termi- 

 nales , elongati. Stlgmata peniclUiforml-plumosa , atro-purpurea 5 piUs elongatis , simpUcibus , 



r 



obsolete denticulato-vesiculosls. Fructus non ampUus suppetit. 



