ANDROPOGON. ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 445 
legg. Hall et Harbour (1862, n. 651), in Kansas (?in h. Seribn.), 
Colorado (ex Vasey), Arizona (Lemmon in h. m.), Montana (Ward in 
h. Scribn.); var. 8 cum g a Hall et Harb. lecta; var. y pr. Brighton 
in civ. Colorado (Vasey in h. m.). 
64. A. chrysostaehyus (Steud. Synops. 1, p. 377); spiculis 
spadiceis eum articulis pedicellisque ferrugineo-hirsutis ; ariste per- 
fectæ spicula duplo longioris columna rufo-hirtula. — A. ferrugineus 
Hochst. ap. Steud. 1. c. qui aptius hoe nomen sine causa seposuit. 
Innovationes intravaginales, basi vaginis vetustis firmis dense 
aggregatis tunicatze. Culmi 60—80 em. alti, robusti, compressi, cana- 
lieulato-suleati, paucinodes, glaberrimi, simplices vel e nodo summo 
ramum floriferum simplicem gracilem fastigiatum edentes. Vagins® 
compresse, carinatz, lævissimæ, elevato-striat®, innovationum 
superne angustatz a culmo solutæ. Ligula brevissima (vix 1 mm. 
longa), truncata, membranacea, glabra sed pilis stipata. Laminæ e 
basi subzquilata lineares, setaceo-acuminat&, inferiores 10—14 cm. 
long&, 2,5—4 mm. late, plans, glauco-viridule, rigidissimse, basi 
supra villos®, margine scaberrim:e ceterum l®viuscule, costa media 
crassiuscula subtus carinata supra albida medullosa, nervis lateralibus 
tenuissimis. Racemi 3—4", digitati, inzequales, 3—6 cm. longi, laxius- 
culi, erecti, a vagina summa 3—8 em. remoti; articuli pedicellique 
spicula sessili "/, breviores, lineares, graciles, apice non cupulati, 
dense ferrugineo-ciliati, ciliis rigidulis subzequalibus articulis duplo v. 
subduplo brevioribus. Spieulz sessiles lineari-lanceolate 7 mm. lon- 
gæ, intense brunneo-violascentes v. rufe : gluma I"* coriacea, a 
medio acutata, extremo apice membranaceo anguste truncata, mar- 
ginibus angustissime inflexa, carinis spinuloso-ciliatis, 5—8-nervis, 
nervis percurrentibus, dorso plano omnino v. in */, inferioribus pilis 
aureofulvis hirsuta, callo parce fulvo-piloso ; II** I^^" æquans, lanceo- 
lato-navieularis, obtusa, interdum mucronulata, 3-nervis, margine 
hyalino ciliata, carina hispidula, dorso glabra; III* II?" æquans, 
lineari-oblonga, enervis, marginibus implicatis ciliata; IV* '/, brevior, 
lineari-oblonga, in '/, superiore biloba, lobis obtusiusculis ciliatis, 
l-nervis, aristam emittens jam in '/, inferiore concrescentem 19—15 
mm. longam, columna obscure fusca recta brevissime hispidula subu- 
lam scabram inferne undulatam fuscam æquante. Palea 0 v. obsoleta. 
Spiculz pedicellate 6—7 mm. long&, lanceolatz, fusco-violascentes : 
gluma I= acutissima v. submucronulata, carinis superne spinuloso- 
ciliatis, plurinervis, excepto callo breviter aureo-piloso glabra ; II“ I 
