Diplocea Barbata, 253 
notch aristated ; the smallest mutic, entire, bearded. Additional 
characters. Flowers when single, sessile with a lateral jutting 
peduncle; when double, one sessile and one pedunculated, 
when three, two are gigege = ag pa The her- 
maphrodite and male flowers are e, e female are near- 
ly clandestine, inferior. Stamens 3, “a 2. Seeds ovate 
oblong. cae 
Observations. This genus is intermediate between amphi- 
carpon, Raf. (Milium amphicarpon Pursh) and aira, L. It 
differs from this last by its polygamy, variable number of 
flowers, notched valsagy, &e. The generic name means double 
notch. Its type is the following species, which chad beam, 
ranged with the aint alter, and considered | 
Pursh. 3 
Diplocea Barbaia. 
cific definition. Stems cespitose, articulations bearded ; 
Tough glaucous, neck ciliated; panicles few flowered, 
axillary ; largest valve trinervate, and ciliated as well 
wil. 
. definition. Caulibus cespitosis, geniculis barbatis, collo 
liis scabris glands, papicols paucifloris, fen 
rva, aristaque ciliata. 
rous: stems many, A 
ext assurgent, r ising one 
t , slender, brittle, weak, and 
The PE or - joints are bearded, the sheaths are 
le neck ciliated, the leaves short, stiff, rough . 
acute, obscurely striated. The panicles have fe 
particularly the female ones, which are sally, 
: l pond 
€: some hermaphrodite flowers are occasionally, 
seldom found among both. panicles; they are all similar, differ- 
ing only in the want of stamina or pistils. The valves of the 
*xterior glumes are nearly equal, oblong, notched, obtuse, matic 
Onenerved. ‘The valvules or valves of the glumul 
(corolla or interior glume) are unequal, the largest is ciliated, 
