126 
Pendulous; drooping, hanging down. 
Pentagonal; with 5 sides and 5 angles. | Putamen, 
Pentandrous; with 5 stamens. 
Pepo, 116, 13. 
Perennial; enduring three years or more. 
Perfoliate, 242, 2. 
Perianth, 54. 
Pericarp, 112. 
Perigynous; inserted into the calyx. 
Peristome ; the rim or border surrounding 
the orifice of the theca of a moss, 
Permanent; same as persistent. 
INDEX AND GLOSSARY. 
Pungent ; ene or pricking. 
Pyriform; pear-sha 
Pyxis, 116, 11. tia 
Quinate, 241, 9. 
Quincuncial, 108, 3. 
Raceme, 298. . 
Racemose ; resembling a raceme. 
Rachis, 290. 
Radiate ; when the outer flowers of an in- 
farnish 
Persistent, 98. florescence are or 
Personate, 104, 5. with rays. ‘ 
Petal, 101. Radiate-veined, 230, 2. 
Petaloid; resembling petals. Radical, 220. 
Petiolate, 221. Radicle, 124, a. 
Petiole, 221, 222. Ramial, 
Phznogamia, 46, 345. » Ramose, 144. 
Pilose, 99, a. Raphe, 121. 
Pinnz ; (wings) the segments of a pinnate Raphides, 29, f. 
~ leaf. Receptacle, 59. 
Pinnate, 240, 1. Recurved; bent or eurved backwards. 
Pinnatifid, 232, 15. Refiexed; curved backwards and down- 
Pistil, 58, 75. wards. : 
“ ~ physiological structure of, 83. Reniform, 232, 12. 
“« theoretical structure of, 84. Repand, 235, 11. 
Pistillate ; bearing pistils. Respiration, 275 — 280. 
Pith, 199. Resupinate ; inverted. 
Placenta, 87. Reticulate, 229, 1. 
Plaited, 217, 6. Retrorse ; bent backwards. 
Plant defined, 10. Retuse, 236, 5. 
Plicate ; folded like a fan. Revolute, 217, 4. 
Plumose, 99, a. Rhizoma, 181. 
Plumule, 124, 3. Rhomboid; oval and angular in the mid- 
Pod; legumes, siliques, &c. dle. 
Pollen, 70. Rib [costa]; ridge caused by projecting 
Polyandrous ; with many stamens. 
Polyadelphous ; stamens united in seve- 
ral 
sets. 
Pol ous; having staminate or pistil- 
ae acl perfect flowers on pai rine 
tree. 
Polygynous ; with many pistils. 
Poly petalea, 354. 
Polypetalous, 101. 
Polysepalous, 94. 
Polyspermous ; many-seeded. 
Pome, 116, 12 
Pores; apertures of perspiration in the 
euticle. 
Primine, 90. 
Prismatic; formed like a prism, with 3 
or more angles. 
Procumbent ; trailing on the ground. 
Proliferous; forming young plants about 
the roots. : 
Prostrate ; trailing flat on the ground. 
Pubescent, 41, a. 
Pulp; the soft, juicy, cellular substance 
found in berries and other fruits. 
Pulverulent; powdery. 
Punctate, 237, 10. 
&e. 
orms of, 143, &e. 
bs aia 7 - 
physiological structure of, 151. 
Risin 105 2. f 
Rostrate; with a beak. 
Rosulate; arranged in a radiant manner, 
like the petals of a double rose. 
Rotate, 104, 4. 
Rugose, 237, 9. 
Runcinate, 232, 13. 
Runner, 185. 
Saccate; with a bag or sack. 
Sagittate, 232, 11. 
“ 
a 
Sapwood, 203. 
Sarcocarp, 112. 
Scabrous; rough. 
Scale; the bracts of the Composite. 
Scape, 186, 289. 
Scarious ; ary, colorless, memb eous. 
Scorpoid ; when racemes are revolute be- 
fore expansion, as Drosera, &e.- 
