378 
NEPETA, ORNITHOGALUM. 
13—1. NEPETA. 42. 39. 
cata'ria, (cat mint, catnep. O. b-w. 7J..) hoary-pubescent; flowers in 
whorled spikes ; leaves petioled, cordate, tooth serrate. 
5—1. NICOTIAN A. 28. 41. 
Exotic. 
t aba' cum , (virginian tobacco, w-r. Ju. O.) leaves lance-ovate, sessile, de- 
current; flowers acute. Naturalized. 
21—4. NOSTOC. 57. 2. 
commu ne , on the earth ; frond plated-lobed, ventricose, gelatinous. — On 
the earth after a storm, an inch or two in extent, olive green. 
12—1. NUPHAR. 13. 62. 
kalmia'na , (O. Ju. 7J..) leaves cordate, lobes near each other ; calyx 5- 
leaved; stigma gashed, with 8 to 12 radiated lines. — Flowers small. 
Water. 
12— 1. NYMPH AE A. 13. 62. 
odora'/a , (pond-lily. O. w. Ju. 2)..) leaves round-cordate, entire, sub-emar- 
ginate ; lobes spreading asunder, acuminate, obtuse ; petals equalling 
the 4-leaved calyx. S. 
13— 2. OBOLARIA. 40. 35. 
virgin' ica, (penny-wort. E. r. Ap. 2J..) stem simple ; leaves oblong, trun- 
cate, fleshy, purple beneath ; flowers axillary, solitary, sessile. 3 — 1 
i. S. 
8—1. CENOTHERA. 17. 88. 
Capsules elongated , sessile. 
bien'nis, (scabish, tree-primrose. O. y. J. (j\) stem villose, scabrous; 
leaves lance-ovate, flat, toothed ; flowers sub-spiked, sessile ; stamens 
shorter than the corolla. 3 — 5 f. 
parrifio'ra , (E. y. Ju. J 1 .) stem smooth, sub-villose; leaves lance-ovate, 
flat; stamens longer than the corolla. 
21—1. ONOCLEA. 55. 5. 
sensib 'ilis , (sensitive fern. O. J. 7|_.) barren frond pinnate ; fertile one 
doubly-pinnate ; stem glabrous. The leafets slowly approach each 
other, on squeezing the stem in the hand. S. 
18—1. ORCHIS. 7. 21. 
Roots oval , or palmate. 
specta'bilis , (O. r. M. 7J..) lip obovate, undivided, crenate, retuse ; petals 
straight; lateral ones longest; spur clavate, shorter than the germ; 
bracts longer than the flowers ; stem leafless. 3 — 6 i. S. 
13—1. ORIGANUM. 42. 39. 
vulga're, (wild marjoram. O. r. Ju. 2)..) spikes round panicled, heaped; 
bracts ovate, longer than the calyx. 1 — 2 f. S. 
Exotic. 
majora'na , (sweet marjoram. Tj.) spikes roundish, ternate, compact, pe- 
duncled ; leaves petioled, oval, obtuse, smoothish. 6 — 12 i. 
6—1. ORNITHOGALUM. 10. 16. 
umbella'lum , (star of Bethlehem. M. 2J..) flowers corymbed, peduncles lon- 
ger than the bracts : filaments subulate. Naturalized. 6 — 8 i. 
