122 
O S MUN D A—P ARMELL A. 
OSMUNDA. 21—1. (Filices.) [From Osmund, who first used itf&s a medicine.] 
cinnamo'mea , (flowering-ferny y. J. 9J..) barren frond' doubly pinnatifid ; seg¬ 
ments oval, entire; fertile fronds with opposite racemes, woolly. 3-6 f. 
OSTRYA. 19—12. {Amentacca .) [From oseon, a bone, on account of its hardness ] 
virgiii"ica , (iron-wood, hop-hornbeam, g. M. h>.) leaves alternate, ovate-ob¬ 
long, sub-cordate, acuminate, unequally serrate; strobilurns oblong-ovate. 
A small tree with very hard and heavy wood. Fertile flowers enlarged 
1 into a sort of oblong cone, resembling the common hop. Woods. Can. 
to Car. 
QXALI8. 10 — 5. ( Gerania .) [From oxus, sour, on account of the juice.] 
acetoseV'la , (wood-soYrel, w. r. M. %.) stemless; scape i-flowered, longer 
than the leaves; leaves ternate, broad-obcordate, with rounded lobes; styles 
as long as the inner stamens ; root dentate. * f 
viola'cea , (violet wood-sorrel, p. J. %.) stemless ; scape umbelliferous, 3 : 9- 
flowered; flowers nodding; leaves ternate, obcordate, smooth ; styles shorter 
than the outer stamens. Scape 4-6 i. Rocky woods. 
stvic" ta, (upright wood-sorrel, y. J. ql.) hairy; stem erect, sometimes procum¬ 
bent, branched ; umbels about as long as the leaves; leaves ternate, obcor¬ 
date ; petals obovate, entire ;* styles as long as the inner stamens. 4-10 i. 
Sandy fields. Flowers small, 4-6 in an umbel. 
OXYOOCCUS. 8— 1. {Ericece.) [From oxus, souf, and coccus , a berry.] 
macro car"pus. (cranberry, r. J. Tq.) creeping ; stem ascending; leaves oblong, 
flattish, obtuse, becoming whitc-beneath ; pedicels elongated; divisions of 
the corolla lance-linear ; berry large, bright scarlet. Wet grounds. 
palus"tris. (J. fq.) divisions of the corolla ovate; berries purple, smaller than 
the preceding. Alpine bogs. 
OXYTROPIS. 16—10. ( Leguminoscc.) 
lombes ,l tii\ (p. Ju. 9J-.) stemless, silky-pilose; leafets numerous, oblong, acute 
at each end; scape about equal to the leaves; spikes oblong, capitate; 
bracts lance-linear, about equal to the calyx. 
PJEONIA. 12—3. {Pap aver ace a.) [From Pceon : who is said to have first applied it to medi¬ 
cinal purposes.] 
ojjicina'lis, (peony, r. J. 2)..) leaves decompound; leafets lobed, lobes broad- 
lanceolate ; capsules downy. Ex. 
PAN AX. 5—2, ( Araliob .) [From pan, all, and akos, medicine, on account of its great virtues.] 
quinquefo'lia . (ginseng, w. M. AL.) root fusiform; leaves ternate, or quinate ; 
leafets oval, acuminate, pelioled-serrafe. 1-2 f. 
trifo'lium, (dwarfginseng,) root tuberous, roundish; stem simple, smooth; 
leaves ternate ; leafets sub-sessile, lance-oblong, serrate; styles often 3; ber¬ 
ry 3-seeded. Woods. 4-6 i. 
PANCRATIUM. 6—1. {Narcissi.) [From pan, all, and krateo^ to conquer, supposed by the 
ancients to have been a powerful medicine.] 
mexica'num , (w. M. 2]..) spat ha about 2-flowered; leaves lance-oblong; 6 
teeth of the nectary bearing stamens, 6 simple. 18-21 i. &. 
PANICUM. 3—2. ( Gramineca .) 
crus-gaVli , (barn-grass, An. Cy>.) racemes alternate and in pairs compound 
rachis 5-angled; glumes terminating in hispid bristles; sheath glabrous. 
2-4 f. 
PAP AVER. 12—1. ( Papaveracea .) [From pappa , pap, so called because nurses mixed this 
plant in children’s food to make them sleep.] 
somnif"enum , (opium poppy, J. <v}.) calyx and capsule glabrous; leaves clasp- 
• ing. gashed, glaucous. Ex. 
rhe'as , (red corn-poppy, r. J. <v> ) capsules glabrous, sub-globose ; stems many- 
flowered, pilose ; leaves gash-pinnatifid. Ex. 
nudicau'U, (y. c f.) capsule hispid; scape 1-flowered, naked, hispid; leaves 
sub-pinnate ; leafets lanceolate, lower ones somewhat gashed. 
PARMEELA. 21—5. {Alga.) [Fromparme, shield, and eilo, to enclose.] 
caper a'ta, (shield lichen,) frond orbicular, pale yellow, becoming green, ru¬ 
gose, at length granulated, dark and hispid beneath; lobes plicate, sinuate- 
