GLOSSARY. 223 



Needle-shaped: long, slender, and rigid, like the leaves of Pines ; p. 68, fig. 140. 

 Nerve: a name for the ribs or veins of leaves, when simple and parallel ; p. 56. 

 Nerved : furnished with nerves, or simple and parallel ribs or veins ; p. 56, fig. 84. 

 Netted-i-eined : furnished with branching veins forming network; p. 56, fig. 83. 

 Nodding (in Latin form, Nutant) : bending so that the summit hangs downward. 

 Node: a knot ; the "joints " of a stem, or the part whence a leaf or a pair of 



leaves springs ; p. 40. 



Nddose: knotty or knobby. Nddulose: furnished with little knobs or knots. 

 Normal : according to rule ; the pattern or natural way according to some law. 

 Notate : marked with spots or lines of a different color. 

 Nucamentaceous : relating to or resembling a small nut. 

 Nuciform : nut-shaped or nut-like. Nucule : a small nut. 

 Nucleus: the kernel of an ovule (p. 122) or seed (p. 136) of a cell; p. 140. 

 Nut : a hard, mostly one-seeded indehiscent fruit ; as a chestnut, butternut, 



acorn; p. 130, fig. 299. 

 Nutlet : a little nut ; or the stone of a drupe. 



Ob- (meaning over against) : when prefixed to words, signifies inversion ; as, 



Obcompressed : flattened the opposite of the usual way. 



Obcdrdate: heart-shaped with the broad and notched end at the apex instead of 



the base; p. 60, fig. 109. 



Obldnceolate : lancc-shapcd with the tapering point downwards ; p. 58, fig. 91. 

 Oblique : applied to leaves, &c. means unequal-sided. 

 Oblong : from two to four times as long as broad, and more or less elliptical 



in outline ; p. 58, fig. 87. 



Obduate: inversely ovate, the broad end upward ; p. 58, fig. 93. 

 Obtuse: blunt, or round at the end ; p. 60, fig. 105. 

 Obverse: same as inverse. 

 Obvoluie (in the bud) : when the margins of one leaf alternately overlap those of 



the opposite one. 

 Ochreate: furnished with oclirece (boots), or stipules in the form of sheaths; as 



in Polygonum, p. 69, fig. 137. 

 Ocliroleucous : yellowish-white; dull cream-color. 

 Octo-, eight, enters into the composition of 

 Octdgi/nous : with eight pistils or styles. 



Octdmerous : its parts in eights. Octdndroits : with eight stamens, &c. 

 Offset: short branches next the ground which take root ; p. 38. 

 One-ribbed, One-nerved, &c. : furnished with only a single rib, &c., &c. 

 Opaque, applied to a surface, means dull, not shining. 



Ope'rculate : furnished with a lid or cover (operculum), as the capsules of Mosses. 

 Opposite: said of leaves and branches when on opposite sides of the stem from 



each other (i. e. in pairs) ; p. 23, 71. Stamens are opposite the petals, &c. 



when they stand before them. 



Orbicular, Orbiculate : circular in outline or nearly so ; p. 58. 

 Organ: any member of the plant, as a leaf, a stamen, &c.; p. 1. 

 Organs of Vegetation, p. 7 ; of Reproduction, p. 77. 

 Organized, Organic: p. 1, 158, 159, 162. 

 Organic Constituents, p. 160. Organic Structure, p. 142. 



