728 : PHARMACEUTICAL BOTANY 
Nucte’oLus.—A small body of dense protoplasm within the nucleus. 
Nur.—A dry, indehiscent, 1-celled, 1-seeded fruit with a stony or leathery pericarp. 
Nut’Let.—A small nut. The characteristic fruit of the Ladzate. 
Nutri’'t1ion.—That branch of Physiology which includes the absorption, distribu- 
tion and assimilation of food stuffs. 
Osn.—A prefix of Latin origin signifying inversion. 
Oxcon’IcAL.—Inversely cone-shaped. 
Oscor’DATE.—Inversely heat-shaped. 
OBLAN’CEOLATE.—Lance-shaped with the broadest part toward the summit. 
Os.ate’.—Flattened at the ends or poles. 
Op’LIGATE.—Necessary, indispensable. 
Os.igue’.—Taking a position between erect and horizontal, as in the case of many 
stems. More developed on one side than on the other, as in certain leaf 
blades. 
On’Lonc.—Longer than broad with nearly parallel sides. 
Oxo’/vATE.—Ovate with the attachment at the narrower end. 
Opsruse’.—Having a blunt or rounded end. 
O’cureA (o’crea).—A sheathing stipule. 
Ors.—See Fixed Oils; Volatile Oils. 
OLrores’1ns.—Secretions composed of resins dissolved in volatile oil. 
Ontoc’eny.—The history of the development of an individual. 
O’ésporeE.—The fertilized egg. 
Open COLLATERAL BunpDLE.—A collateral bundle in which a cambium zone lies 
between the xylem and phloem strands. 
Oper’cuLuM.—The transversely dehiscent lid or cover of a moss capsule. 
Orsic’uLAR.—Circular. 
Or’pER.—A division of a class containing one or more families. 
Ortnor’rRopous.—Applied to ovules or seeds which are erect, with the micropyle at 
the apex and the hilum coinciding with the chalaza. 
O’vary.—The lower part of a pistil or carpel containing the ovules. 
O’vate.—Shaped like a lengthwise section of a hen’s egg and having the attach- 
ment at the broader end. 
O’vu.Le.—A transformed bud destined to become a seed after fertilization. 
O’vum.—The female sexual cell. 
Pau’ATE.—A convex projection on the base of the lower lip of a personate corolla. 
Pa’LeA (Pal'et)—An inner bract of a Grass inflorescence which with the lemma 
incloses the flower. 
PALEA’cEOus.—Chaffy. 
PaL'isApE CrLis.—Radially-elongated cells with more or Jess indurated walls 
found in certain seed coats. 
PAu'IsADE PAREN’CHYMA (Palisade Tissue).—Elongated mesophyll cells lying 
perpendicular to the surface of the leaf. 
PAL’Lip.— Pale. 
PAL’MATE.— Divided or lobed in radiate fashion. 
PALMAT’Ir1D.—Palmately-cleft. 
PAnpbvu’RIFoRM.—Fiddle-shaped. 
PAN‘ICLE.—A compound raceme. 
