444 n MONOCOTYLEDONEJX. ANDROPOGON. 
internodia æquantes v. subsuperantes, superiores iis breviores. Ligula 
ovato-rotundata 2—3 mm. longa, tenuiter albo-membranacea, demum 
fissa, margine minute fimbriolata. Lamin® e basi æquilata lineares, 
Setaceo-acuminatze, inferiores 10—20 cm. longe, 4—6 mm. late, 
vernatione convolutz, adultze plane, rigide, glauc®, margine scabe- 
rule, ceterum utrinque leves, glabrz, costa media tenui uninervi 
supra latiuscule albolineata, parce medullosa, nervis lateralibus pri- 
mariis secundariisque crassiusculis supra prominentibus. Spatha pro- 
pria a racemis plus minus remota, glabra, cire. 10 em. longa. Racemi 
bini v. terni, 5—8 em. longi, stricti, robusti, densiflori, albido-v. 
flavido-villosi, multiflori; rhacheos artieuli pedicellique spiculam ses- 
silem subsequantes, lineares, disjuneti apice obsolete cupulati, dorso 
marginibusque dense albido- v. gilvo-villosi, imi cujusvis racemi vero 
glabrescentes. Spieule sessiles 8—11 mm. longs, lineari-lanceolatze, 
viridulæ v. livide subviolascentes : gluma I"* coriaceo-chartacea, a 
!J, V. */, inferiore acutata, subintegra v. minutissime bidentula, cari- 
nis superne pilis gluma 3—4-plo brevioribus ciliata, 6-nervis, nervis 
per ternos approximatis (cfr. spec. praeced.), loco nervi medii canali- 
culato-depressa, callo pilis gluma 3—4-plo brevioribus barbato ; II" 
T :equans, lanceolato-navieularis, acuminata, l-nervis, carina longe 
ciliata, dorso ceterum glabra, scabra v. etiam pilosa, marginibus 
angustissime hyalinis glabra : III* II^» z:equans, lanceolata, 3-nervis, 
- marginibus implicatis retrorsum ciliatis; IV* parum brevior, lanceo- 
lata, brevissime bidentata, ciliata, 3-nervula; palea ea '/,—2-plo bre- 
vior, oblonga, enervis, cHiata. Spieule pedicellat® sessiles sequantes, 
anguste lanceolatz, viridule v. violascentes, interdum pruinose : 
gluma I= carinis superne longe ciliatis v. spinulosis, dorso scabra, 
5—9-nervis, callo pilis gluma 3— 4-plo brevioribus barbato; II? P^ 
Subzquans, acuta, l-nervis, margine sepeque carina ciliata ; Ie IV* 
decrescentes, lanceolatze, aeutze, 1—3-nerves, ciliolatze ; palea iis 2-plo 
brevior, ciliata. 
Var. a, flaveolus (Hack. 1. c.). Articuli Rayestentiinilien: ; spiculæ 
sessiles 8 mm. longe; gluma I" et II“ etiam dorso pilosa, IV’ 
aristam 2—5 mm. longam vix e glumis exsertam emittens. 
- B, incanescens (Hack. l. c.). Articuli canescenti-albidi; spieule 
11 mm. longz; gluma I et II“ carinis tantum iisque parcius pilos; 
IV* ut in praecedente. 
y, muticus. Ut 8, sed gluma IV* integra, mutica. Folia spiculzeque 
valde pruinosa. 
In planitiebus elatis Ameriez boreali-occidentalis sub lat. 41° 
