136 
PANICUM— PARNASSIA. 
PAN"TCUM. 3—2. (GraminecE.) 
crus-gal"li, (barn-grass, Au. 0.) racemes 
alternate and in pairs ; compound racbis 
5-angled ; glui^ies terminating in hispid 
bristles; sheath glabrous. 2-4 f. 
his"pidvm, (S. Oc. 0.) panicle com- 
pound; nodding racemes alternate ; glumes 
terminating in hispid bristles ; sheaths his- 
pid. Salt marshes." 3-4 f. 
clande^ti'ninn, (Au. 14. ) culm v ith short 
axillary branches ; leaves broad-lai.ceohite, 
cordate at ba.se ; sheaths hispid, enclosing 
the short panicle; abortive floret neutral, 
2-valved, upper valve obtu.se. Moist woods. 
2-3 f. 
latifo'linm, (Ju. 2X) culm mostly simple, 
bearded at the joints ; leaves oblong-lance- 
olate, smooth, or with the sheaths somewhat 
pubescent ; panicle terminal, a little ex- 
sert, simple, pubescent ; spikelets oblong- 
ovate ; abortive floret antheriferous, 2 val- 
ved. 1 f. 
pwbes"cens, (J. erect, much branched, 
leafy, softly pubescent ; leaves lanceolate, 
ciliate ; panicle small, few-Howered, free ; 
spikelets sub-globose, ovate, pubescent. 
18 i. 
dichofomwi, (Au. 2_C.) culm mnch 
branched, dichotOmous above ; branches 
fasciculate ; leaves numerous, lanceolate, 
smooth ; panicle simple, capillary, lax ; 
abortive floret neutral ; upper valve mi- 
nute, bifid. Var. curva'tum,c\x\m very tall ; 
branches few, somewhat curved. Var. 
fancicula'tnm, culm low, erect, or decum- 
Dent; branches and leaves dense-fascicled ; 
panicles small, concealed among the leaves. 
Var, gra'cili, culm tall, slender; leaves 
membranaceous. 8-16 i. 
ni'tidum, (panic grass, Ju. ll-) culm slen- 
der, simple, smooth ; sheaths bearded at 
the throat; leaves few, broad-linear; pan- 
icle capillary, rather crowded, compound, 
remote, smooth; spikelets minute, obtuse, 
ovate, slightly pubescent; lower glume 
very small. Var. cilia'tnm, culm hairy; 
leaves linear-lanceolate (lower ones broad- 
er), sparingly hirsute, ciliate on the mar- 
gin; panicle with the branches and flowers 
pubescent. Var. ramulo'sum, culm more 
branched ; panicle contracted ; branches 
smooth. Var. pilo'sum, culm very hairy ; 
lower leaves approximate and broad-lance- 
olate, upper ones linear, rather rigid, sub- 
pilose above, ciliate at base ; sheaths vil- 
lo.se, minutely papillose ; panicle sub-con- 
tracted ; branches virgate ; flowers pubes- 
cent. Var. gla'brum, smooth except the 
base of the leaves, nearly simple ; lower 
leaves short, approximate, sub-cardlagi- 
nous; panicle branched, almost verticillate ; 
spikelets large; upper valve of the abortive 
floret entire. Var. bnrba'tnm. culm simple, 
smooth ; nodes hairy ; leaves linear-lanceo- 
late ; .sheaths smooth, except on the mar- 
gin; flowers minutely pubesceni. 1-2 f. 
agroi<t"oi'de^,[K\x. 'II) culm compressed, 
smooth, erect; leaves veiy long; panicles 
lateral and terminal, pyramidal, spreading ; 
branches bearing racemes; spiUelets ap- 
pre.ssed ; abortive floret neutral; valves 
nearly equal 2-3 f. 
virga'tum, (An. 2X-) whole plant very 
smooth ; panicle diffuse, very large ; flow- 
ers acuminate ; abortive floret nearly equal 
3-4 f. 
capilla're, (S. i^.) culm nearly simple ; 
sheaths very hairy ; panicle large, capillaiy, 
expanding, loose; spikelets long-peduncled, 
acuminate, smooth ; abortive floret 1-valved. 
Var. sylvat!'imm,cvL\m branched at the base, 
very slender ; leaves linear. 1-2 f. 
fus"co-7-ii'bens, (Au.) racemes linear, vir- 
gate ; glumes clavate, colored, hairy under 
the divisions of the panicle, t^. 
ama'nim, (Oc. 11.) very glabrous; leaves 
thick, glaucous, very bitter ; panicle ap- 
pressed ; glumes acuminate. 2-3 f. S. 
angnstifo'liiim, panicle few-flowered, ex- 
panding; leaves scattered, linear-lanceo- 
late, glabrous beneath, sparingly ciliate. 
1-3 f. S. 
PAPA'VER. 12—1. (Papaveraceo!.) [From 
pappa, pap, so called because nurses mixed 
this plant in children's food to make them 
sleep.] 
somnif'enm,, (opium poppy, J. @.) calyx 
and capsule glabrous ; leaves clasping, 
gashed, glaucous. Ex. 
rhe'as, (red corn-poppy, r. J. ^.) cap- 
sules glabrous, sub-globose ; stems many- 
flowered, pilose ; leaves gash-pinnatifid. 
Ex. 
midicau'le, (y. $ .) capsule hispid ; scape 
1 -flowered, naked, hispid ; leaves sub-pin- 
nate ; leafets lanceolate, lower ones some- 
what gashed. 
brocteu'ta, (r. J.) capsules smooth ; stem 
1 -flowered, rough ; leaves scabrous, pinnate, 
serrate ; flowers subtended by leafy bracts. 
3 f. Ex. 
du'bium, (r. w. Au. @.) leaves pseudo- 
pinnate ; .segments lance oblong, pinnatifid, 
inci.sed, sessile, decurrent; stem with spread- 
ing hairs ; peduncles with appressed bi-i.stly 
hairs ; capsules obovoid oblong, smooth. 
Naturalized in Chester co., Pa. 1-2 f. 
PARIETA'RIA. 19—4. (Urticem.) [From a 
Latin word signifying wall, from its growmg 
on old ruins.] 
pennsylva'nica, (pallitory J. ©.) leaves 
lance oblon'g', veiny, opake, dotted ; involu- 
crum 3-leaved, longer than the flower. 
12-1.-5 i. 
Jlorida'na, (J.) leaves ovate, nearly round, 
obtuse, opake, dotted ; flowers clustering 
as long as the involucrum ; stem assurgent. 
12-18 i. S. 
PARiWE'LIA. 21—5. (Algm.) [From pame 
shield, and eilo, to enclose.] 
capera'ta, (shield lichen,) frond orbicu 
lar, pale yellow, becoming green, rugose, 
at length granulated, dark and hi.spid_ be- 
neath ; lobes plicate, sinuate-laciniate, 
roundish, somewhat entire; receptacles 
scattered ; margin incurved, entire, at 
length pulverulent. On old timber, &c. 
P.ARNAS"SIA. 5—4. {Saxifraga.) [Frora 
Mount Parnassu.s, the seat of tiie Muses.] 
america' an, (flowering plantain, w. y. p 
Ju. Z^.) leaves radical, (often a leaf on tho 
scape,) heart-orbicular, 5 9 nerved ; necta- 
ries 5, each divided into 3 filame.'its termi- 
