ANDRQPOGON,  ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 413 
bidentata vel in '/,—'/, superiore acute biloba, glabra, aristam exse- 
rens gracilem patentem 15—20 mm. longam, columná 1—3-spira e 
glumis non v. parum exsertá, quam subula multoties breviore. An- 
thera 1—1,2 mm. longa. Pedicelli steriles spiculam 8 subsquantes 
usque ad subsuperantes, filiformes, patuli, villis pedicello — 
ribus vestiti. 
Subvar. 1. genuinus. Culmi 50—70 cm. alti. Folia, saltem infe- 
riora, villosa; laminæ 6—10 em. longs. Paniculæ rami simplices, 
interdum sine spathis propriis racemorum, infra nodos pore barbati. 
Gluma I"* integra, IV** arista 15—16 mm. longa. 
Mexico : in campis pr. Chinantla (Liebm. 590), Orizaba (Bourg. 
2376). 
2. raripilus. Humilior ; folia pilis patentibus sæpius raris adspersa, 
v. margine tantum fimbriata ; laminæ 5—6 cm. longse. Paniculze rami 
simplices, glabri, eumd spathis. Gluma I": bimucronata, II^ longius- 
cule mueronata, IV** arista 14—15 mm. longa. 
Mexico : Guadalajara (Palmer 227 coll. an. 1886). 
3. Mohrii. Culmi 1—1,5 em. alti, robusti; folia dense villosa; 
laminz 20—30 em. longze, 4—6 mm. latze. Panicule 50—60 em. lon- 
gæ rami ramulosi, ad nodos et infra eos dense barbati, eum spathis. 
Gluma I= bimucronulata, II“ mutica, IV** arista cire. 20 mm. longa. 
Alabama : in pinetis uliginosis pr. Mobile (Mohr in h. m.). — A. 
virginici var. tetrastachy® valde affinis, presertim arista perfecta, 
spicula tabescente presente (in illa nulla), racemis robustioribus 
distinetus. — A. Liebmanni serius fortasse melius A. virginico sub- 
speciei numero jungendus. Notam, cui in describenda specie maxime 
innixus sum, nimirum ramos spathze propriæ expertos variabilem esse 
speciminibus ulterioribus edoctus sum. 
37. A. longiberbis (Hack. in Flora 1885, p. 131) ; racemis binis 
subrobustis spathis obteetis in paniculam parce ramosam angustam 
laxam dispositis ; vaginis foliorum superiorum dissitibus minime fasti- 
giatis appresse villosis, laminas sensim valde abbreviatas panicula 
multoties breviores ferentibus, ex axillis ramos solitarios v. binos 
parce ramulosos procreantibus ; articulis ab ipsa basi densissime vil- 
losis ; gluma I"* inter carinas valde elevatas canaliculato-impressa, 
callo pilis erebris gluma parum brevioribus villosa, arista imperfecta, 
spicula tabescente 1 mm. longa. — A. tetrastachyus var. distachyus 
Chapm. Fl. South. Un. St. 
Culmi graciles 60—80 em. alti. Folia viridia ; vaginæ innovationum 
