GLOSSARY. 



281 



OCTAN'DBOTTS. Having eight stamens. 



OPEB'CULUM. The lid of a sporange. 



OBGANOG'BAPHY. A description of the 

 organs of plants. 



OETIIOT'EOPOUS (ovule). Having its base 

 in one position with that of the nucleus, 

 while the mycropyle is at the apex. 



OS'MOSE. The tendency of fluids to in- 

 termix. 



O'VARY. Lowest part of the pistil, con- 

 taining the seeds. 



O'VOID. Kesembling an egg. 



O'VTJLE. A rudimentary seed. 



PA'LE^E. Chaff; the bract-like bodies 

 growing among the florets of a flower- 

 head. 



PAN'ICLE. An open cluster. 



PAP 'PUS. The down, beard, bristles, etc., 

 representing the calyx in Compositae. 



PABEN'CHYMA. Cellular tissue having a 

 spheroidal, not tubular form. 



, Complete,. When the cells lie close 



together, without intervals. 



, Incomplete. "When there are un- 

 occupied spaces between the cells. 



PAEAPDY'SES. Stalks or filaments ac- 

 companying the antheridia of mosses. 



PAEI'ETAL PLACENTA'TION. Having the 

 placenta attached to the walls of the 

 ovary. 



PEWN'CLE. The stem supporting the 

 flower and fruit of a plant. 



PENTAM'EBOTJS. Arranged in fives. 



PENTAN'DBOUS. Having five stamens. 



PENTAS'TICHOTTS. In five rows. 



PE'PO. An indehiscent, fleshy fruit, with 

 seeds borne on a parietal placenta, and 

 with the epicarp more or less thick and 

 hard. Ex., squash. 



PEEEN'NIAL. Living many years. 



PERFECT (flowers). Having stamens and 

 pistils. 



PER'IANTH. The calyx of a single flower ; 

 the leaves of a flower when calyx and 

 corolla are not readily distinguishable. 



PER'IGONE. Same as perianth. 



PEEIG'YNOTTS. Having the stamens in- 

 serted upon the ovary. 



PEE'ISTOME. A fringe of teeth around 

 the mouth of a sporange. 



PEESISTENT. Kemaining beyond the usual 

 period. 



PEESISTENT (floral whorls). Eemaining 

 till the fruit is mature. 



PET'AL. A lobe of the corolla, 



PET'ALOID. Like a petal. 



PET'IOLE. A leaf-stalk. 



PHYLLOTAX'IS. Leaf arrangement. 



PIL'EXTS. A cap ; the head of a fungus. 



PIN'NA (pi., PINN.E). One leaflet of a pin- 

 nate leaf, or branch of a compound pin- 

 nate leaf. 



PIN'NULE. A subdivision of a pinna. 



PIS'TILLATE. Having a pistil, but no 

 stamens. 



PISTILLID'IA, or PIS'TILLIDS. Organs in 

 cryptogamous plants, answering to the 

 pistils of flowering plants. 



PLACEN'TA (pi., PLACENTAE). That part 

 of the ovary which bears the ovules. 



PLTT'MULE. The first bud of a young 

 plant. 



POT/LEN. The powder contained in the 

 anther. 



POLLIN'IA. Pollen-grains cohering in 



POLYADEL'PHOUS. Having the filaments 

 grown together in three or more bun- 

 dles. 



POLYAN'DROTTS. Having more than 12 

 stamens. 



POLYCOTYLED'ONOTTB. Having seed with 

 two or more lobes. 



POLYG'AMOTTS. Having male, female, and 

 hermaphrodite flowers on the same 

 plant. 



POLYHED'BIC. Many-sided. 



POLYPET'ALOTIS. Having the petals dis- 

 tinct. 



POLYSEP'ALOTTS. Having the sepals dis- 

 tinct. 



POME. A fleshy, indehiscent, many- 

 celled fruit, with tough endocarp, and 

 enclosed by the calyx- tube. Ex., ap- 

 ple. 



PO'EOTJS. Having pores or holes. 



PE^FLORATION. (See ESTIVATION.) 



PRI'MINE. The outer sac of an ovule. 



PROSEN'CHYMA. Fibrous tissue having 



cells with tapering extremities. 

 PROTECTING OBGANS (of flowers). Those 



which cover and nourish the stamens 



and pistil. 

 PROTHAI/UTJM, or PBOTHALLTTS. The 



leaf-like body into which the spore of 



a fern expands. 

 PRO'TOPLASM. A mucilaginous substance 



spread on the inside of cell-walls. 

 PXTBES'CENT. Having fine, short hairs 



or down. 

 PYX'IS. A pod which dehisces by the 



falling off of a sort of lid. 



QTJI'NARY. Arranged in fives. 

 QFINCUN'OIAL PR.EFLORATION. (See 

 PK^FLOBATION.) 



