504. 
INDEX AND VOCABULABY. 
differs from punctate, which has dots resem- 
bling holes. 
Pe'ri. Around. 
Per'ianth, 68, 
Per'icarp, 86, 87. 
Pei-id'ium. The round membraneous case which 
contains the seeds of some mushrooms. 
Perig'ynous. (From ^eri, around, and gynia, 
pistil.) 
corolla, 83. 
Periph'ery, The outer edge of the frond of a 
lichen ; the circumference of a circle. 
Per'isperm. (From peri, around, and sperma, 
seed.) Around the seed. Sliin of the seed. 
Peristo'mium. Tiie fringe or teeth around the 
mouth of the capsule of mosses, under the lid. 
Per manent. Any part of a plant is said to be 
permanent when it remains longer than is 
usual for similar parts in most plants. 
Persist'ent, 58. 
Per'sona te. (From persona, a mask.) 72, 236, 238. 
Perspira'tion of plants, 121. 
Pet'al, 12, 71. 
Pet'iole. 41, b. 
Phcnog amous, 20. 
Philadd'phcEy 460. 
Philos'ojihers of Greece, 331. 
Phte'nm pratense, 175. 
Phyl'la. The Greek word for leaves. 
P/iyllotaz'is, 49. 
Physiol' og-y. Derived from the Greek, a knowl- 
edge of nature. 
Physiolog ical Botany, 10. 
Phytolacca'ceji:, 502. 
Phytol'ogy. The science which treats of the 
organization of plants. 
Phy'ton. (From the Greek phuton, a plant.) A 
plantlet first formed in the seed, 52. 
P/5--weed, 189. 
pFleole, 90, Fig. 121, 
Pi'lcus. The hat of a fungus. 
Pii'lar. See Columella and Column. 
Pi'lose. Hairy, N^ith distinct, straightish hairs. 
Pi'lus. A Lair, 290. 
Vine, 54, i ; 279. 
apple, 97. 
Pink, 14, 220, Fig. 178. 
Pinna. (From pinna, a wing.) Segments of a 
pinnate leaf. 
Pin'nate, 55, Fig. 59. 
Pinnat' ijid. Cieft in a pinnate manner, but the 
segments aro united or confluent at the base, 
54,i. 
PlPERA'CKiE, 513. 
Pis' til, 80, 111, Fig. 87. 
Pistils. Transformed leaves, 80. 
Pistillate. Having pistils, but no stamens. 
Pistillid'ia. 
Pitch' er plant, 54, t ; 315. 
Pith, 130. 
Placenta, 80, 80, . ; 89. 
Plane. Flat, with an even surface. 
pLANTAGINA'cKiE, 480. 
Plan' tain, 178. 
Plants, affected bj the state of the atmosphere, 
306, 308. 
— , by the sun, 307. 
, first account of, 330. 
differ from animals, 385. 
confined to particular places, 317. 
peculiar to their native regions, 318. 
of cold climates, 314, 317, 318. 
of warm countries, 314, 317. 
of the torrid zone, 319. 
Pli'cate. Folded Uke a fan, Fig. 54, c. 
Plin'y, 335, 
Plumbaoina'ce/e, 481. 
Plu'mose. Feather-like. 
Piu inula, or Plume, 101. 
Plu'rimus. Very many. 
Poa, 175. 
Pod, 91. 
Pode'tia. The pedicels which support the frond 
of a lichen. 
Pod'osperm, (From podos, a part, and sperma, 
seed,) Pedicel of the seed. The same as the 
funicle, 
PODOSTEMA CE^, 518. 
Poi'son hemlock, 190. 
Poi'sonous plants, 26, 190, 229. 
Po&e-weed, 223. 
Polkmonia'ce^, 494. 
Pol'len, 79, 81 ; 81, a. 
Pollin'ia. Masses of pollen, as seen in the '-'r 
chidaceae. 
Po'lus. Many. 
Polyan'drous. Many stamens inserted upon the 
receptacle. 
Polyceph'alous. See Monoc^haloua, 
Polydel'phia. 256. 
PoLyga'la, 252. 
Polygala'ce^, 443. 
Polyga'mia, 26. 
Polyg'amous. Having some flowers which are 
perfect, and others staminate, pistillate, or neu- 
ter. 
Polygona'cbjE, 506. 
Polymor'phous. Changeable, assuming many 
forms. 
Polypetf alotis, 71. 
Poly])hyl'loiis. Having many leaves. 
Polysep'alous. A calys. 
Pome. A pulpy fruit, containing a capsule, as 
the apple, 96. 
Pomegran'ate, 226. 
Pond-lily, 231, 303. 
Pontederia'ce*, 552, 
Pop'lar, 233, PI, 3, Fig. 1. 
Poppy, 17, 231. 
Pores. Apertures in the cuticle for perspiration 
Po'rous. Full of holes. 
vessels, 118, 
Por'rected. Extended forwai'd. 
Portulacca'ce^, 419 
Potato, 185, 
Prceflora'tion, 66. 
Pramorse' root, 34. 
Pras'inus. Green, like a leek. 
Praten'sis. Growing in meadow land. 
Prick' les, 64, b. 
Prick'ly pear, 225, PI. 1, Fig. 7. 
Pri'mine. The outer integument of the ovule. 
Primordial leaves, 40, 52, 101. 
Primula'ce^, 479. 
Prin'ciple of organic life, 139, 
Prismat'ic. liike a prism, with several angles. 
Probos'cis. An elongated nose or snout, applied 
to projecting parts of vegetables. 
Pro'cess. A projecting part. 
Procum'bent. Lying on the ground. 
Produc'tion by bulbs, 37, c. 
Proliferous. A flower is said to be proliferous 
when it has smaller ones growing out of it. 
Prop. Tendrils and other climbers. 
Proper juices of vegetables, 124. 
Prdtea, 180. 
Prox'imate principles, 140. 
Prox'imus. Near. 
Pru'nus, 226. 
Pseu'do. Prefixed to a word, implies obsolete oi 
false. 
Pseu' do-pinnate. Falsely or imperfectly pinnate, 
the leaflets confluent, or not articulated at the 
base. 
Pubes'cence, 64, g. 
Pubes'cent. Hairy, downy, or woolly. 
Pulp. The juicy cellular substance ot berries aw> 
other fruits. 
