PLATYSPETALUM— PODOSTEMUM. 
143 
PI,ATYSPET"ALUM. 14—1. (Crucifera:.) 
LFiorn platus, broad, petalon, leaf.] 
'pxLrpuras"cens, stigma 2-lobed, spread- 
ing ; style manifest ; scape naked, 1-leaved, 
and pubescent ; silicles sub-glabrous. 
dii'bium, stigma undivided, sub-sessile ; 
silicles and scapes pubescent. 
PLATYSPER"MU!VI. 14—1. (Crucifercs.) 
[From platus, broad, sperma, seed.] 
scapige'rum, (w. Mar. A p. root sub- 
fusiform, scarcely fibrous; leaves all radi- 
cal, spreading, sub-runcinate pinnatifid ; 
lobes mostly acute ; lower ones gradually 
smaller, attenuated into a petiole ; scapes 
digitate, erect, simple, very glabrous, 1- 
flowered ; flowers small, erect. 
PLECTRI'TIS. 3—1. (Dipsacem.) [Fromplek- 
iron, a spur, alluding to the form of the 
corolla.] 
conges"ta, (i*. @.) glabrous; flowers in a 
dense whorl ; bi'acts many-cleft, in subulate 
divisions. Var. m'rior,leaves very narrow. 
PLKE'A. 9—2. {Junci.) [From a Greek 
word sis:nifying abundance, from the num- 
ber of stamens ] 
tennifo'lia, (y. r. IX-) very glabrous ; 
leaves very narrow-ensiform ; sheaths of 
the spike 1-flowered. 1-2 f. 
PO'A. 3—2. (GraminecE.) [From a Greek 
word, sigryfying grass.] 
annu'a, (Ap. @.) panicle sub-aecund, 
divaricate ; spikelets ovate-oblong, 5-flow- 
ered ; florets free ; culm oblique, compress- 
ed ; root fibrous. 6-8 i. 
praten"sis, (J. 2^.) panicle diffuse; up- 
per leaves much shorter than the smooth 
sheaths ; florets acute, 5-nerved, webbed at 
the base ; stipule short-truncate, root creep- 
ing. 2-3 f. 
aquaf'ica, var. america'na, (Au. 7X) pan- 
icle erect, semi-verticillate, difl:'use; branches 
flexuous, smooth; spikelets linear, 6-8-flow- 
ered ; florets ovate-obtuse, free ; leaves 
broad-linear, smooth ; sheaths smooth. 4-5 f 
trivia'lis, (Ju. 2^.) panicle equal, diffuse ; 
spikelets oblong-ovate, about 3-flowered ; 
florets webbed at the base, 5-nerved ; culm 
and sheaths roughish ; stipules oblong ; root 
creeping. 2-3 f, 
comprea" sa, (blue-grass, Ju. 2X.) panicle 
contracted, somewhat secund ; spikelets 
oblong, 3-6-flowered ; florets webbed ; 
glumes nearly equal ; culm oblique, com- 
pressed ; root creeping. Var. sylves"lris, 
panicle loose, spreading ; spikelets 2-3 flow- 
ered; culm slender, nearly erect. 12-18 i. 
scroti' na, (J. 2X-) panicle elongated, dif- 
fuse, at length somewhat secund ; spikelets 
lanc'e-ovate, 2-3-flowered ; florets a little 
webbed at the base, yellow at the tip, ob- 
scurely 5-nerved ; root creeping. 2 3 f 
nemara'lis,[ll.) panicle attenuated, weak; 
branches flexuous ; spikelets ovate, about 
3-flowered ; florets loose, slightly vyebbed, 
acute, ob.soletely nerved ; stipule almost 
wanting. 2 f. 
nerva'ta, (J. 21-) panicle equal, diffuse; 
branches weak, at length pendulous; spike- 
hits 5-flowered ; florets free, conspicuously 
7-nerved, obtuse. 3-4 f. 
obtu'sa, (Au, paniclft ovate, contract- 
33* 
ed; spikelets ovate, tumid, 5-7-flowered ; 
florets free ; glumes scarious ; palea ovate, 
smooth, obtuse ; lower one indistinctly 7- 
nerved ; leaves as long as the culm, with 
the sheaths smooth. 2-4 f. 
ca7iaden"sis, (Ju. 2X-) panicle large, ef- 
fuse ; branches semi-verticiUate, flexuous, 
at length pendulous ; spikelets ovate, tu- 
mid, 5-8 flowered ; florets free ; lower pa- 
lea acutish, 7-nerved ; upper one very ob- 
tuse ; stamens 2. 3-4 f. 
capilla'ris, (Au. @.) panicle very large, 
loose spreading, capillary ; spikelets 3-flow- 
ered, ovate, acute ; florets free ; culm 
branched at the base ; leaves hairy. 12 i. 
peclina'cea, (Ju. @.) culm cespitose, ob- 
hque ; leaves hairy at the base ; panicle 
capillary, expanding, pyramidal, hairy in 
the axils ; spikelets linear, 5-9-flowered ; 
florets free, acute, upper palea persistent. 
8-12 i. 
rep"tan!i, (Au. @.) dioecious; culm 
branched, creeping ; panicle fascicled ; 
spikelets lance-linear, 12-20-flowered ; flo- 
rets acuminate. Var. cmsptto' sa, culm very 
short, cespitose ; spikelets much crowded, 
oblong. 8 i. 
eragros"tis, (.lu. @.) panicle equal, spread- 
ing; lower branches hairy in the axils; 
spikelets linear-lanceolate. 9-15-flowered ; 
florets obtuse ; root fibrous. 12-18 i. 
te.>t"uis, (Au.) panicle branching, expand- 
ing, capillary; .spikes 3 flowered, glabrous 
long peduncled ; leaves linear, very long. 
12-18 i. ^\ 
parvtjio' ra, (J. 11) panicle difFu.se, capil- 
lary ; spikelets small, generally 3-flowered ; 
flowers obtuaish, striate, caducous; leaves 
distichous, flat. 12-18 i. 
conje/'ta, panicles terminal and axillaiy, 
erect, compressed, with clustered flowers; 
spikelets 8-flowered, glabrous. 2-3 f. S. 
augustifo'lia, (M. 2^.) leaves linear, invo- 
lute; panicle somewhat crowded; spikes 
lanceolate, acute, 4-flowei-ed ; flowers vil- 
lose at the base. 1-2 f. S. 
ni'tida, (Ju.) stem erect, very glabrous; 
panicle large, dittuse, capillary, sub-verti- 
cillate ; peduncles long ; spikes lanceolate, 
8-flowered. 1 f. S. 
rigi'da, (M. 2^.) panicle lanceolate, a 
little branched, secund ; branches alternate, 
secund. 2 4 i. S. 
airoi'dea, panicle attenuated, erect ; 
branches capillary, loose, semi-verticillate ; 
leaves with very long sheaths, short and 
acute ; spikelets oblong, obtuse, sub-sessile, 
4-6-tiowered ; glumes unequal, shorter than 
the palea. 4-5 f (S. 
PODOPHYL"LUM. 12—1. {RmumulacecB., 
[From pons, focrt, and phulion, leaf, on ac- 
count of the shape of its leaf] 
pelta'tum, (wild mandrake, may- apple 
w. M. 14.-) stem terminated with 2 peltate, 
palmate leaves ; flower single, inserted in 
the fork formed by the petioles of the leaves. 
Sometimes the plant is 8-leaved, and the 
flower inserted on tne side of one of the 
petioles. 1-2 f. 
PODOS"TEMUM. 19—2. (AroidecB.) 
ceratophyl"lum, (thread-foot, J u. 11. ) steia 
