ÆGILOPS BICORNIS, Nob.
Æ G ILO P S , L in n ., e t au c to rum re c en t io rum , ch a ra c te r ib u s emendandis .
Spicülæ biformes (laterales nempe terminali dissimiles), 3-7-(raro 8-v. 9-) florae, floribus
duobus summis minoribus v. minimis neutris (modo i-modo 2-paleaceis), v. in spiculis 3-
aut 4-floris flore summo solum neutro. Spicula terminalis spiculis lateralibus conspicue gra-
cilior, rbachi parallela, glumæ valvis florumque paleis regularibus. Spicülæ laterales rha-
cheos respectu transverse positæ, glumæ valvis irregularibus. Gluma bivalvis; valvæ plus
minusve inæquales, coriaceæ (demum cartilagineæ), 4"T3-costatæ, concavæ, ecarinatæ, basi
haud connatæ, oppositæ, persistentes (simulac florum paleæ a spicula fructifera una cum
rhacheos articulo respondente decidua nunquam solutæ), apice i-5-aristatæ v. dentatæ v.
integerrimæ et exaristatæ, in spicula terminali oequilateroe, in spiculis lateralibus incequi-
lateroe (interdum subdimidiatæ). Glumella bipaleacea (at in floribus summis neutris haud
raro ad paleam externam redacta). Palea externa c.hartaeeo-herbacea (demum saltern in
exserta parte coriacea), concava, ecarinata, quinquenervia (nervis a basi ad medium v. paulo
altius filiformibus, supra medium sëhsim crassioribus conniventibus, haud raro sub apice
confluentibus), oblonga v. oblongo-lanceolata, marginibus subinflexa, in spicularum latera-
lium floribus haud raro inæquilatera, modo aristata modo exaristata, in spicula terminali
constanter æquilatera et apice speciebus plerisque i-3-aristata; speciebus paucis in spiculis
omnibus apice obtuso mutico exaristato. Palea interna extema paulo minor, membranacea,
hyalina, oblonga, v. lineàri-oblonga, carinato-binervia (carinis dorso saltern a medio ad api-
cem cartilagineo-marginatis et ciliatis v. serrulatis), marginibus inflexa, dorso sub anthesi
plus minusve complicata, apice truncata v. retusa v. bifida, exaristata. Stamina 3. Pistillum
et sqüamulæ-hypogynæ Hordeacearum. CARYOPSis(Hordeacearummore involuta et apice bar-
bata, basi radicula prominente umbonata) paleæ internæ adhærens.
Plantæ annuæ* multicaules ; radice fibrosa. F o l ia angusta, plana, striata, nervo medio
subtus prominente ; radicalia elongata; caulina brévia. Vaginæ involutæ, orepilosæ, summæ
interdum ventricosæ. Ligula truncata v. dentata, subcartilaginea, brevissima. C au l e s sim-
plicissiirii, inferne geniculati et plus minusve decumbentes; articulo summo elongato, demum
longius breviusve supra folii ultimi vaginam exserto. Spicæ florescentia ab apice deor-
sum progrediens; quavis spicula autem flores infimi præcociôres. R hachis ad articulationes
demum fragilis, v. quibusdam speciebus tenax ; articuli spathulati, dorso convexi, ante spi-
culam concavi, marginç aculeolati.
Ægilopes valvis paléisvé exaristatis aut uni-aristatis a Triticis cerealibus solummodo glüma ecarinata (ideoque vix genere);
essentialiter différant.
Subgenus SITOPSIS, Nob.
Spica gracilis, elongata, sublinearis, rhachiparallele compressiuscida, e spiculis 7 v. scepius pluribus
{interdum ao-a5) rhacheos internodiis longionbus (ideoque distiche contiguis v. subimbneatis) oblon-
go-lanceolatis haud venlricosis subdivergentibus (saltern sub anthesi) composita, vix conspicue cau