120 
NYMPHiEA—ORCHIS. 
NYMPHiEA. 12—1. (Papaveracecc.') [From numpha, water-nymph.] 
odora'ta , (pond-lily, w. Ju. %.) leaves round-cordate, entire, sub-emarginate; 
lobes spreading asunder, acuminate, obtuse; petals equalling the 4-leaved 
calyx; stigma 16-20-rayed ; flowers large, odorous. The Egyptian lotus 
belongs to this genus. 
NYSSA. 20—5. ( JEliagni .) 
multiflo'ra , (sour or black gum, y-g. M. T^.) leaves lanceolate, very entire, 
acute at each end ; the petiole margined, and midrib villose ; fertile pe¬ 
duncles many-flowered; flowers inufnbellate clusters; drupe nearly round, 
dark blue. Low woods. 30-50 f. 
bijlo'ra , (tupelo-tree, swamp horn-bean,) leaves ovate-oblong, very entire, 
acute at each end, smooth ; fertile peduncles 2 flowered ; drupe oval, com¬ 
pressed. Swamps. 30-50 f. 
OBOLARIA. 13—2. {Pedicular es.) 
virgin"ica , (penny-wort, r. Ap. 7}..) stem simple ; leaves oblong, truncate 
fleshy, purple beneath; flowers axillary, solitary, sessile. 3-4 i. 
0CYMUM. 13 — 1. ( Labiatai .) [From okus, swift, on account of its rapid growth.] 
basiVicum , (basil, <v>.) leaves ovate, glabrous; calyx ciliate. 6-12 i. 
CENOTHERA. 8—1. ( Onagrce .) 
Capsules elongated , sessile . 
bien"nis , (scabish, tree-primrose, y. J. J\) stem villose, scabrous; leaves 
lance-ovate, flat-toothed ; flowers sub-spiked, sessile; stamens shorter than 
the corolla. 3-5 f. 
parvifio'ra , (y. Ju. J'.) stem smooth, sub-villose ; leaves lance-ovate, flat \ sta¬ 
mens longer than the corolla. 
grandijlo'ra , (y. Ju. J\) stem nearly smooth, branched; leaves ovate-lanceo¬ 
late, glabrous; flowers axillary, sessile, large; petals obcordate • stamens 
declining, shorter than the corolla.. 2-3 f. Introduced. 
Capsules obovate , clavale ) angular , mostly pedicelled. 
frutico'sa , (shrubby oenothera, sun-drop, y. Ju. %.) pubescent; stem branching 
from the base, divaricate; leaves sessile, lanceolate, acute, slightly toothed, 
pilose; flowers in a terminal raceme; petals broad-obcordate. Shady 
' woods. Stem 12-18 inches high, purple. Yar. ambigua, has smaller flowers. 
hybriJda, stem erect, villose; leaves pubescent on both sides, lanceolate, re¬ 
motely toothed, undulate ; capsules somewhat spiked; flowers pale yellow. 
9-18 i. 
chrysan"tha r (dwrarf-scabish,) stem slender, minutely pubescent; leaves lan¬ 
ceolate, rather obtuse, flat, entire; segments of the calyx twice as long as 
the tube; capsule sessile; flowers small, bright yellow. Mountains. 
OLEA. 2—1. ( Jasminecb .) [Name from the Celtic word clea, signifying oil.] 
america'na, (American olive, w. M. T^.) leaves lanceolate-elliptic, entire; ra¬ 
cemes compressed ; bracts all persistent, connate, small. 
europe'a , leaves lanceolate, entire; racemesaxillary, crowded. The drupes 
when green are used for pickles, when ripe they afford the oil called olive 
oil. Ex. 
ONOCLEA. 21—1. ( Filices .) [From onos, a vessel, and klieo, to close.]" 
sensi'bilis , (sensitive fern, J. 2]..) barren frond pinnate ; fertile one doubly pin T 
nate ; stem glabrous. The leafets slowly approach each other on pressing 
the stem in the hand. 
0NOPORDON. 17—1. ( Cinarocephalce .) 
acan"tldum , (cotton thistle, p. Ju. J 1 .) calyx scaly, scales spreading; leaves 
ovate-oblong, sinuate. Naturalized. Ex. 
QPLOTHECA. 15—5. {Gerania.') 
jlorida'na, (w. Ju.) stem erect, pubescent, with tumid joints; leaves sessile, 
lance-linear, scabrous above, lanuginous beneath. 3-4 f. 
ORCHIS. 18—1. ( Orchidecb .) [A name derived from the Greek.] 
spectabvlis , (r. M. 2|.) lip obovate, undivided, crenate, retuse; petals straight; 
