TAB. 116. PANICUM OBTUSUM.
C u l m i s compressis nodisque glabris; fbliis p l ani s , margine serrulato-scabris,
s u p r a puberulis; spicis i - y , racemosim dispositis, alternis, distanlibus; spiculis
g e m i n i s , unilaleralibus , subqiiadriiariam imbricatis, elliptico-obovatis , obtusis,
g l a b r i s j glumis maequalibus ; inièriore 5 - , superiore 7-nerviaj flore masculo bipal
e a c e o ; bermaphrodiLo ovalo-elliptico, lasvi.
P a n i c u m obtusiim Ilumb. et Kunlh Nova Genera r. p.
Crescit in planitie montana regni Mexicani, prope Guanaxuato el Burras,
locis humidi s , altitudine 1080 hexapodarum. %. Florel seplembri.
Culmi cffispitosi, inferno ramosi, ei'ecd, pedales, compressi, silicato-striati, glabri. Nodi
imbcrbes. Folia linearia, acutata, plana, striata, suLtus glabrìuscula, supra puberula, rigida,
margine serriilato-scabra, 1 |-/|.-pollicaria, sesquilineam lata. Vaginas compresso-carioatie, usque
ad basiin iìsss, striai®, ^abrasj inferiores iaternodiis breviores. Ligula membranacea, subtiuncata,
glabra. Spica3 qiiatuor vel septem, racemosim dispositi, subsessiles, alternce, dislantes,
adpressa vel paleates, 7-9 lineas longaì. Spicul® gemin®, altera subsessilis, altera
pediceUata, alterna, uuilaterales, subquadrifariam imbricatie, elliptico-obovat», obtusai, sesquilineam
loBgce; pecUcellis brevibus, puberulis. Rhacliis communis triquetra, glabra, a-3-
pollicaris; parliales triquetras, ilexuosie, puberuke. Glumasdua), herbaces, concava, glabra;,
albidffi, conca-v®, obtus®, iosquales; inferior 5 b r e v i o r , subrotundo-ovata, 5-nervia, nervis
vii'idibus, ina?qualiter distantibus, sub apice glum® confluentibus ; gluma superior lalissime
obovata, septemnervia, aervis ina3quidistanlibus, viridibus, infra apicem glum® confluentibus.
Flos inferior masculus, bipaleaceus, glumam superiorem vix superans : Palea inferior herbacea,
lalissime elliplica, obtusa, concava, sexnervia, albida, glabra, nervis inajquidislanlibus, viridibus,
sub apice pale® confluentibus; palea superior pauJo longior, elliptica, apice rotundata,
binervia, byalino-membranacea, plana, marginibus inflexis, lalis, infernesubauriculatis, angulis
nervo percursis, membranaceo-subulata, glabra. Squamul® du®, collaterales, antiae, carnosoinembranace
®, truncal®, glabr®. Slamina tria, bypogyna,ut in flore hermaphrodilo. Pistilli
mdbnenluin nullum. Flos hermaphroditus vix b revior , ovalo-eUiplicus, obtusius cuius, exteme
convexus, inteme planiusculus, glaber, albidus, lavis, sub lente subtilissime reticidalo-lessellalus.
Pale® coriaceo-chartace®j inferior late eUiplica, obtusiuscula, 6-nervia, nervis insquiilislantibusj
palea superior vis brevior , elliptica, aculiuscula, binervia, dorso planiuscida, marginibus
tenuioribus, medio ladoribus, inflexis genitalia amplectens; angulis obtusis. Squamid®
du®, antic®, coUalerales, carnos®, cuneal®, apice tmncalo-lobat®, giabr®. Stamina tria,
liypogyna, duo lateralia, unum anterius. Filamenta filifoi-mia, glabra. Anther® lineari-oblong®,
ulrinque bifid®, bilocuLires, glabr®, cinnamomeo-fusc®, secundum totam longitudinem deliiscentes.
Ovarium sessile, oblongum, glabrum, apice inter stylos apicatum. Styli duo, terminales,
elongali. Sligmala penicilliformi-plumosa, atro-purpureaj pilis elongatis, simplicibiis,
obsolete denliculato-vesiculosis. Fruclus non ampUus suppetit.
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