GLOSSARY. 



Nucamentaceae, an order of plants in the Fragmenta methodi 



naturalis of Linnaeus. 

 Nucamentum, a catkin. 

 Nucleus, a kernel. 



JSudus caulis, a naked stalk, i. e. without leaves. 

 Nudus^os, a flower wanting the calyx. 

 Nutans caulisy a nodding stalk. 

 Nux, a nut. 



O 



Obcordatum petalnm, a heart-shaped petal, with its apex 

 downwards. 



Obliquumyb/??/w, when the apex of the leaf points obliquely 

 towards the horizon. 



Oblongum/o/ww, an oblong leaf. 



Obovatum folium, an oval leaf, the narrow end at the base. 



Obsolete lobatitm folium, leaves having lobes scarce discernible. 



ObtUBum folium, leaves blunt, or rounded at the apex. 



Obvolutuinyb/itim, rolled against each other, when their re- 

 spective margins alternately embrace the straight margin 

 of the opposite leaf. 



Octandria, eight males, the eighth class in the sexual system. 



Officinalis, a plant used in medicine, and kept in the apothe- 

 caries shops. 



Operculum, a cover, as in the mosses ; a round body that 

 closes the opening of the Theca. 



Oppositi ra mi, folia 7 branches and leaves that grow by pairs 

 opposite to each other. 



Orbiculatunijfo/w/ft, round leaves. 



Orchideae, orchis, an order of, plants in the Fragmenta me- 

 thodi naturalis of Linnaeus. 



Ordo, an order. 



Orgya, a fathom or six Parisian feet. 



Ovalefolium, an oval leaf, of equal breadth at each end. 



Ovarium, the germen. 



Ovatimi folium, an oval, or egg-shaped leaf, the broad end 

 at the base. 



Paginate///, the surface of a leaf. 



Palea, chaff, a thin membrane rising from a common recep- 

 tacle which separates the flosculi. 

 Jpaleaceus pappus, chaffy down. 



