398 MYRTUS, ORCHIS. 



Southern. 



na'na (b. & y 4), leaves oblong, villose ; racemes few flowered ; seeds 

 smoothish ; marginate serrulate. 



111. MYRTUS. 19. 39. 



Exotic. 



commu'nis (myrtle, w. Ju. > ), flowers solitary ; involucrum 2 leaved ; leaves 

 ovate. 



61. NARCISSUS. 9. 17. 



Exotic. 

 pseudo4narci8"sus (daffodil. M. 4), spatha 1 flowered ; nectary bell form, erect, 



crisped, equalling the ovate petals. 



tazef'ta (polyanthos. M. 4), spatha many flowered ; nectary bell form, plicate, 



truncate, thrice as short as the petals ; petals alternately broader ; leaves flat. 



jonquil"la (jonquil. M. 4), spatha many flowered ; nectary bell form, short ; 



leaves subulate. 



poeficus (poets' narcissus. 4), spatha 1 flowered ; nectary wheel form, very 

 short, s carious (red), crcnulate ; leaves inflexed at the margin. 



191. NEOTTIA. 7. 21. 



tor"tilis (summer ladies'-tresses. O. w. Ju. 4), radical leaves linear ; scape 

 sheathed ; flowers spirally secund ; lip somewhat 3 lobed ; middle lobe lar- 

 ger, crenulate. 12 i. S. Var. gracilis, radical leaves ovate, caducous, 

 membranaceous. 



13 i. NEPETA. 42. 39. 



cata'ria (cat mint, catnep. O. b-w. 4), hoary pubescent ; flowers in whorled 

 pikes ; leaves petioled, cordate, tooth serrate. 



51. NICOTIAN A. 28 41. 



Exotic. 



taba'cum (Virginian tobacco, w-r. Ju. ), leaves lance ovate, sessile, decurrent ; 

 flowers acute. Naturalized. 



214. NOSTOC. 57. 2. 



conimu'ne, on the earth ; frond plated lootd, ventricose, gelatinous. On the 

 earth after a storm, an inch or two in extent, olive green. 



121. NUPHAR. 13. 62. 



kalmia'na (O. Ju. 4), leaves cordate, lobes near each other ; calyx 5 leaved ; 

 stigma gashed, with 8 to 12 radiated lines. Flowers small. Water. 



121. NYMPILEA. '13. 62. 



odora'ta (pond lily. O. w. Ju. 4), leaves round cordate, entire, sub-emarginate ; 

 lobes spreading asunder, acuminate, obtuse ; petals equalling the 4 leaved 

 calyx. S. 



132. OBOLARIA. 40. 35. 



mrein"ica (penny-wort. E. r. Ap. 4), stem simple ; leaves oblong, truncate, 

 fleshy, purple beneath ; flowers axillary, solitary, sessile. 3 4 i. S. 

 81. (ENOTHERA. 17. 88. 



Cap/rules elongated, sessile. 



bien"nis (scabish, tree-primrose. O. y. J. ), stem villose, scabrous ; leaves 

 | lance ovate, flat, toothed ; flowers sub-spiked, sessile ; stamens shorter than 



the corolla. 3 5. f. 



parv'iflo'ra (E. y. Ju. ), stem smooth, sub-villose ; leaves lance ovate, flat; 

 stamens longer than the corolla. 



211. ONOCLEA. 55. 5. 



sensib"ilis (sensitive fern. O. J. ^i), barren frond pinnate ; fertile one doubly 

 pinnate ; stem glabrous. The leafets slowly approach each other, on squeez- 

 ing the stem in the hand. /S. 



181. ORCHIS. 7. 21. 



Roots oval t or palmate. 



specta'bilis (O. r. M. 4), lip obovate, undivided, crenate, retuse ; petals straight ; 

 lateral ones longest ; spur clavate, shorter than the germ ; bracts longer than 

 the flowers ; stem leafless. 3 G i. <S. 



