186 



INDEX AND GLOSSARY. 



Normal, according to rule, regular. 

 Nuciform, nut-like. 

 Nucleus, kernel (so. ovule), 535. 

 Nut. See Glans, 562. 



Ob (in composition), denotes inversion; as, 

 Decompressed, flattened back and front 

 Obeordate, 284. Oblanceolate, 266. 

 Oblique, unequal-sided (sc. leaves). 

 Oblong, 265. Obovate, 266. Obtuse, 283. 

 Ob volute (in aestivation), 214. 

 Ochrea, sheathing stipules, 249. 

 Ochrolehcous, cream-color, pale yellow. 

 Octo (in Greek composition), eight. 

 Octandria, 877. Octandrous, 8-stamened. 

 Octogynous, 8-styled, 878. 

 Offset, a short lateral shoot, 159. 

 Oligos (in Greek composition), few ; as, 

 Oligandria, with few stamens. 

 Olivaceous, olive-green, brownish-green. 

 Opaque, dull, not shining. 

 Opercula-, with a lid, 496. 

 Opposite, two at a node, 153, 222. 

 Orbicular, Orbiculate, circular, 265. 

 Orchidaceous, 484. 

 Organogens, 829. 

 Organography, 39. 



Organic world, 30. Organic soil, 837. 

 Orthotropous (ovule), erect, 536. 

 Osseous, bony, as the peach-stone. 

 Oval, 265. Ovate, 265. 

 Ovary, 515. Ovule, 532. 

 Ovoid, egg-shaped as in fruits. 

 Oxygen, 831. 



Palea3 or Pales, 339, 489. 



Paleaceous, chaffy, having pales. 



Palmi-veined, 260. Palmate, 272. 



Panduriform, fiddle-shaped. 



Panicle, 352. Paniculate, panicled. 



Papilionaceous, 474. 



Pappus the calyx of Composites, 485. 



Parallel-veined, 258. 



Paraphyses, jointed threads around the 



antheridia of mosses. Fig. 522. 

 Parasites, 144. 

 Parenchyma, 664, 730. 

 Parietal, on the wall (paries), 526. 

 Parted, deeply divided into parts. 

 Patent, wide open. Patulous, half open. 

 Pear-shaped, obovoid, larger above. 

 Pectinate, combed, finely pinnatifid. 

 Pedate, shaped like a bird's foot, 273. 

 Pedicel, 328. Peduncle, 327. 

 Peltate, shield-form, 271. 

 Pendent, Pendulous, hanging, drooping. 

 Penicillate, with a tuft of hairs, as if a 



camel's-hair pencil. 



Pente (in Greek composition), five; as, 

 Pentamerous, 5 -parted. 

 Pentandrous, 503. Pentandria, 877. 



Pepo, a fruit like a melon, 568. 

 Perennial, living several years, 92. 

 Perfect flower, with both stamen and 



pistil. 



Perfoliate (through the leaf), 293. 

 Peri (in Greek composition), around. 

 Perianth, 402; forms of, 469. 

 Pericarp, 547. 

 Perigynium, 488. 

 Perigynous, 464. 

 Period of flowering, 365. 

 Perisperm, same as Albumen, 590. 

 Peristome, 632. 



Persistent, remaining long in place. 

 Personate, 483. 

 Petals, 401 ; forms of, 453. 

 Petaliferae, 898. 

 Petaloid, with the form or texture of 



petals. 



Petiole, 243. Petiolate, 239. 

 Petiolule, 246. 

 Phsenogamia, 892, 895. 

 Phyllodium, plur. Phyllodia, 307. 

 Phyllotaxy, leaf-arrangement, 220. 

 Physiology, 41, 736. 

 Phytology, 43 (Greek, phytos, a plant). 

 Pileorhiza, cap of a rootlet, 725. 

 Pileus, cap of some Fungals. Fig. 537, c. 

 Pilous, with erect, thin hairs, 298. 

 Pine, size of, 101, Californian, 101. 

 Pinnate, 287. Pinnatifid, 268, 269. 

 Pistil, 405, 511. 



Pitchers (leaves). See Ascidia, 308. 

 Pith, 692. Pitted cells, 650, 667. 

 Pitted, with depressions or excavations. 

 Placenta, 520 ; free axile, 528. 

 Plourenchyma, 666. 



Plicate, plaited lengthwise as a fan, 394. 

 Flumous, feathery. 

 Plumule (a little plume), 103, 593. 

 Pollen, 508. Pollen tube, 756. 

 Pollinia, masses of pollen, 510. 

 Poly (in Greek compounds), many. 

 Polyadelphous, 506, 877, 3. 

 Polygamous, Polygamia, 877, 5. 

 Polypetala>. See Dialypetalse, 903. 

 Polypetalous, Polysepalous, 458. 

 Pome, a fruit like an apple, 569. 

 Posterior, next the axis. 

 Potato, manner of its growth, 188. 

 Precocious, flowering before the leavei. 

 Prrefoliation, vernation, 209. 

 Premorse, ending abruptly, 185. 

 Press for drying plants, 57. 

 Prickles, 18, 684. 

 Priinine, same as Testa, 535. 

 Primordial utricle, 645. 

 Prismatic, prism-shaped, having several 



parallel, longitudinal angles. 

 Procumbent (stem), 148. Fig. 38. 

 Produced, extended more than usual 



