INDEX AND GLOSSARY 



267 



Mucronate. Tipped with a mucro. 94. 

 Multifid. Cleft into many lobes or seg- 

 ments. 



Mummy cases, seeds from, 19. 

 Muricate. Kough, with short, hard points. 

 Muriculate. Very finely muricate. 

 Mycelium, 183. 



Naked. Bare ; without the usual covering 

 or appendages. 129. 



Nectar glands, 125. 



Nectar, protection of, 125. 



Nectary. Any place or organ where nectar 

 is secreted. 125. 



Nectariferous. Producing nectar. 



Nemalion, 159. 



Nerve. A simple or unbranched vein or 

 slender rib. 78. 



Node. The place upon a stem which nor- 

 mally bears a leaf or whorl of leaves. 



Nodose. Knotty or knobby. 



Nostoc, 157, 170. 



Notebooks, 241. 



Nucellus, 137. 



Nucleus, 116, 173, 214. 



Nut. A hard, indehiscent, 1-celled, and 

 1-seeded fruit, though usually resulting 

 from a compound ovary. 150. 



Nutlet. A diminutive nut. 



Nutrient salts absorbed, 232. 



Obcompressed. Compressed dorsiventrally 



instead of laterally. 

 Obconically. Inversely conical, having the 



attachment at the apex. 

 Obcordate. Inverted heart-shaped, 94. 

 Oblanceolate. Lanceolate, with the broadest 



part toward the apex, 92. 

 Oblique. Unequal-sided or slanting. 

 Oblong. Considerably longer than broad, 



and with nearly parallel sides. 92. 

 Obovate. Inverted ovate. 93. 

 Obovoid. Having the form of an inverted 



egg. 



Obsolete. Not evident ; rudimentary. 

 Obtuse. Blunt or rounded at the end. 94. 

 Ocrea. A legging-shaped or tubular stipule. 

 Ocreate. Having sheathing stipules. 

 Ochroleucous. Yellowish white. 

 Officinal. Of the shops ; used in medicine or 



the arts. 

 Offsets, 58. 

 Oil in seeds, 9. 

 Oogonium, 176, t79, 189. 

 Oospore, 176, 179, 189. 

 Oosporic reproduction, 182. 

 Opaque. Dull ; not smooth and shining. 

 Operculate. Furnished with a lid. 

 Operculum. A lid ; the upper portion of a 



circumscissile capsule. 203. 

 Orbicular. Circular. 92. 

 Orchids, roots of, 40. 

 Orthotropous (ovule or seed"). Erect, with 



the orifice or micropyle at the apex. 137. 

 Oscillatoria, 170, 256. 



Osmosis, 230. 



Oval, 92. 



Ovary. The part of the pistil that contains 

 the ovules. 104. 



Ovate. Egg-shaped ; having an outline like 

 that of an egg, with the broader end down- 

 ward. 92. 



Ovoid. A solid with an oval outline. 



Ovule, 136 ; fertilization of, 118. 



Ovules, 103 ; study of, 99. 



Ovuliferous. Bearing ovules. 



Oxidation, source of vital heat, 20. 



Oxygen, in germination (Exp. 1), 10, 19; 

 liberated, 235; required by cells, 287; 

 taken up by embryo, 20. 



Palate. A rounded projection of the lower 

 lip of a personate corolla, closing the throat. 



Paleaceous. Chaffy. 



Palet. The upper thin chaffy or hyaline bract 

 which, with the glume, incloses the flower 

 in Grasses. 



Palisade cells, 227. 



Palmate (leaf). Eadiately lobed or divided. 

 78. 



Palmately. In a palmate manner. 



Panicle. A loose, irregularly compound in- 

 florescence with pedicellate flowers. 142, 

 143. 



Panicled, Paniculate. Borne in a panicle ; 

 resembling a panicle. 142, 143. 



Papilionaceous (corolla). Having a stand- 

 ard, wings, and keel, as in the peculiar 

 corolla of many Leguminosae. 132. 



Papillose. Bearing minute nipple-shaped 

 projections. 



Pappus. The modified calyx limb in Com- 

 posite, forming a crown of very various 

 character at the summit of the achene. 149. 



Parasitic. Growing on and deriving nour- 

 ishment from another plant. 16, 41. 



Parenchyma, spongy, 227. 



Parietal. Borne on or pertaining to the wall 

 or inner surface of a capsule. 105. 



Parted. Cleft nearly but not quite to the 

 base. 95. 



Partial. Of secondary rank. 



Pectinate. Pinnatifid with narrow, closely 

 set segments ; comblike. 



Pedate. Palmately divided or parted, with 

 the lateral segments 2-cleft. 



Pedicel. The support of a single flower. 140. 



Pedicellate. Borne on a pedicel. 



Peduncle. A primary flowerstalk, support- 

 ing either a cluster or a solitary flower. 140. 



Pedunculate. Borne upon a peduncle. 



Peltate. Shield-formed and attached to the 

 support by the lower surface. 80, 93. 



Penicillium, 192. 



Pentadelphous. Of 10 stamens. 185. 



Perennial. Lasting year after year. 45. 



Perfect (flower). Having both pistil and 

 stamens. 128. 



Perfoliate (leaf). Having the stem appar- 



. ently passing through ^t. 



