O RI 119 



15. NYSSA, 12. 24. 

 vttlosa (pepperidgc, -tupelo.) biflora (sour-gum.) 



142. OBOLARIA, 40. 35. 

 irirgini-ca (penny-wort.) 



141. OCYMUM, 42. 39. 

 baslliciim (basil.) 



8 -1. OENOTHERA, 17. 88.' 

 biennis (scabish, tree-primrose, y. J. .) stem villose, 

 scabrow, stamens shorter than the corol. parviflora. Ion- 

 grftoru. grandiflora. fruticosa. (sundrops.) muricata. 

 pusilla. chnjsantha (dwarf scabish.) 



41. OLDENLANDIA. 



glomerate, (round-head.) 



221. ONOCLEA, 55. 5. 



sensibilis (sentitive fern. Ju. y .) barren frond ]>innate 5 

 fertile one doubly-pinnate, struthiopteris. obtusiloba. 



181. ONOPORDUM, 49. 54. 



acanthium (cotton thistle.) 



5-.1. ONOSMODIUM, 41. 42 

 hispidum (false gromvvelL) 



225. OPEGRAPHA, 57. 2. 

 macularis (lettered lichen.) 



221. OPHIOGLOSSUM, 55. 5. 



vulgatum (addertongue fern. M. IT.) frond ovate, sim- 

 ple : spikes about an inch long, bulbosum, 



191. ORCHIS, 7. 21. 



ciliaris (orchis.) blephariglottis. psycodes. cristata* 

 lacera. discolor. Jlara. tridentata. juscescens. specta- 

 bilis. indsa. roiundifolia. bifolia. fanbriata (p. Ju. y.) 

 lip 3-parted ; divisions wedge-form, ciliate-f ringed, or- 

 bicuLata. Jissa. dilatata (giant orchis.) 



141. ORIGANUM, 42. 39. 

 vulgare (wijd marjoram.) majorana (sweetmajoram.) 



