Glossary. 415 



Nod'ding : hanging downward. 



Node(L. nodus, a knot) : that part of a stem which normally bears a leaf or leaves. 

 Nodose' : having many or conspicuous nodes or knotty swellings. 

 Nu'cleus (L. nucleus, kernel or inner part) : a well-defined, and in young 

 cells, central body of a cell, which is thought to be the bearer of the 

 inheritable qualities. Figs. 12, 45, and 46. 



Nut: a hard, indehiscent, usually I -seeded fruit, as the walnut and acorn. 

 "Fig. 334. Nut'let: a small nut. 



Ob- : a Latin prefix indicating inversion. 



Obcla'vate (L. ob-, inverse; davatus, club-shaped) : club-shaped, and at- 

 tached at the thicker end. 



Obcompressed' : compressed dorsiventrally instead of laterally. 



Obcon'ical (L. ob- -f conus, a cone) : conical and attached at the narrower end. 



Obcor'date (L. ob- + cor, cordis, the heart) : heart-shaped and attached at the 

 narrower end. 



Oblan'ceolate (L. ob- + lanceola, a little lance) : lanceolate with the broadest 

 part toward the apex. Fig. 226. 



Oblique', pr. obleek' or oblike' (L. obliquus, slanting) : slanting or unequal 

 sided. 



Ob 'long : much longer than broad and with parallel sides. Fig. 221. 



Obo'vate (L. ob- + ovatus, egg-shaped) : egg-shaped and attached at the 

 smaller end. Obo'void : an obovate solid. 



Ob'solete (L. obsoletus, worn out) : much reduced or rudimentary. 



Obtuse' : blunt or rounded at the end. Fig. 249. 



Ochroleu'cous, pr. ok-ro-lu'kus (Gr. ochra, yellow earth; leukos, white): 

 yellowish white. 



O'crea (L. ocrea, a legging) : a tubular stipule, or a pair of stipules united in 

 the form of a tube. Fig. 264, 2. 



O'create : provided with an ocrea. 



Odd'ly pin'nate: pinnately compound and having a terminal leaflet. Fig. 255. 



Offic'inal (L. officina, a workshop) : used in medicine or the arts. 



Offset or off 'shoot : a lateral shoot which takes root and starts a new indi- 

 vidual. Fig. 211. 



O'ospore (Gr. oon, an egg ; spora, seed) : the fertilized egg cell. 



Opaque': dull; not transparent. 



Oper'culum (L. operculum, cover, lid) : the upper half of a capsule which 

 dehisces transversely. Figs. 150 and 325. 



Op'posite : said of leaves when two stand on opposite sides at a node. 



Orbic'ular (L. orbicularis, circular) : flat with circular contour. Figs. 225 

 and 246. . 



