442 MONOCOTYLEDONER. ANDROPOGON. 
patuli, robusti, densiflori; articuli pedicellique spiculam sessilem 
dimidiam non æquantes usque subsuperantes, lineari-cuneati, dis- 
juncti apice obsolete cupulati, sepius appendieulo late dentiformi 
instrueti, utrinque v. artieuli altero tantum margine aecrescendo- 
ciliati, ciliis albis laxiuseulis, summis articulo plus duplo brevioribus; 
cujusvis racemi articulus imus szepius glaber. Spiculz sessiles lineari- 
lanceolat&, e brunneo-viridi et violaceo variegatæ; gluma I" coria- 
cea, a medio sensim valde acutata, apice acute bidentula, carinis 
aculeolato-scabra, dorso punctato-scabra v. inferne leviuscula, praeter 
nervos carinales utrinque nervo intracarinali extracarinalique carinse 
valde approximatis notata (unde « 6-nervis nervis per ternos approxi- 
matis » Kunth) raro nervulis intermediis aucta, inter nervos intraca- 
rinales canaliculato-depressa (presertim in sicco), callo pilis gluma 
4-plo brevioribus barbato; HI“ P^ squans, lanceolato-navieularis, 
acuminata v. mueronata, l-nervis, carina (superne sinuata) scabra, 
marginibus anguste hyalinis ciliata; II H zequans, lanceolata, 
3-nervis (nerv. lateral. tenuissimis), marginibus implicata, ciliata ; IV* 
parum brevior, laneeolata, breviter acuteque bifida, ciliolata, basi 
3-nervis, aristam emittens 12—16 mm. longam, columnä parum e glu- 
mis exsertä quam subula duplo breviore; palea quam gluma IV* duplo 
brevior, oblonga, enervis, apice ciliata. Antherz flavze, 3 mm. long&; 
stigmata purpurea, oblonga. Spiculæ pedicellatze sessiles sequantes, 
lanceolate (szpe inzquilaterales), sordide violascentes, sspius plus 
minus pruinose : gluma I"* lanceolata, acuminata v. mucronata, 
marginibus vix implicatis, serrulato-scabris, dorso levis v. superne 
: punctato-scabra, 9—11-nervis, nervo medio interdum subcarinato, 
callo obsolete v. manifestius pilosulo; II“ '/, brevior, late lanceolata, 
acuta, 3—5-nervis, marginibus hyalinis ciliata ; III* II?» zequans ; IV* 
eis parum brevior, utraque lanceolata, acuta, 1—3-nervis, ciliolata ; 
palea iis duplo brevior, oblonga. Antherz 3—4 mm. longz. In specim. 
cultis interdum pistillum in spic. pedicell. evolvitur. 
Satis variabilis, sed varietates bene distinetz vel constantiores 
existere non videntur. Formas sequentes subvarietatum numero pro- 
pono : 
l. genuinus; lamine prster fimbrias parcas basilares glabr& ; 
articuli spicula sessili subduplo breviores; spiculæ sessiles 8—10 mm. 
longe, pedicellat® basi fasciculo pilorum manifesto 1,5 mm. longo 
barbatze. . 
2. furcatus ; ut præcedens, sed spiculz pedicellatze basi glabre v. 
obsolete barbulate. Hue preter synon. Muehlenbergii etiam A. ter- 
