Plastic 



A DICTIONARY 



Plumose 



PlAs'TlC, serving the purpose of 

 growth; phismic; formative. 



PLAs'TID, one of a class of 

 clearly defined protoplasmic 

 granules in the protoplasm of 

 active cells which forms the 

 basis of the chlorophyll and 

 other color-granules, and is 

 also the centre at which starch- 

 grains are produced. For the 

 synonymy of the colorless plas- 

 tids, see Leucoplast; and for 

 that of the color-plastids, see 

 Chromatophore. 



PLAs'TLN, see Achromatin. 



PLAs'TOID, see Rhabdoid. 



PLATE, see Nuclear Plate and 

 Sieve-plate. 



PLATEAU', the very short stem 

 which bears the scales in a 

 bulb. Formerly called Corui 

 or Cormus. See Corm. 



PLATYCAR'POUS, broad-fruited. 



PLAtYLO'BATE, broad-lobed. 



PLATYPHYL LOUS, broad-leaved. 



PLEIO-, a Greek prefix meaning 

 full of, or many. 



PLEIOMOR PHISM, (1) a change 

 of form due to excessive 

 growth of an organ; (2) some- 

 times used in fungi for Poly- 

 morphism. 



PLEl6PH'YLL0US, having leaves 

 without apparent buds or 

 brauches in their axils. (Rare.) 

 See Pleiophylly. 



PLEI'OPHYLLY, a state in which 

 there is an abnormal number 

 of leaves from the same point, 

 or an unusually large number 

 of leaflets in a compound leaf. 

 Compare Polyphylly. 



PLEIOSPER MOUS, containing an 

 abnormally large number of 

 seeds. Formerly the same as 

 Polyspermous. 



PLEI'OTAXY, a state in which 



there are an abnormally large 

 number of whorls. 



PLE'NUS, full, applied to 

 " double" flowers. 



PLEOMOR'PHIgM, seePLEiOMOR- 



PHISM. 



PLE 6N, a term proposed by 

 Nageli for those aggregates of 

 molecules which cannot be in- 

 creased or diminished without 

 changing their chemical na- 

 ture. 



PLEONASM, having any part 

 abnormally numerous. (Rare.) 



PLE'ROME, nascent fibrovascular 

 tissue. 



PLE'ROME SHE ATH,the phloem- 

 sheath in its nascent state. 



PLESI6m6R'PHOUS, nearly of 

 the same form. 



PLEUREN'€HYMA, fibrous 

 woody tissue. (Rare.) 



PLEUROCAR'POUS, see Clado- 



CARPOTJS. 



PLEURODlS'COUS, growing upon 

 the sides of the disk, as the ray- 

 flowers in Compositae. 



PLEUROGY'RATE, having the 

 annulus in ferns placed later- 

 ally, as in the genus Tricho- 

 manes. 



PLEURORHI'ZAL, see Accum- 



BENT. 



PLEU'ROTRLBE, said of zygo- 

 morphic flowers which have 

 the stamens so placed that an 

 insect entering will receive the 

 pollen upon its side, as in the 

 pea. Compare Nototribe 

 and Sternotribe. 



PLflX'US, any network. 



PLI'cA, see Polyclady. 



PLI'CATE, folded like a fan. 



PLlcAT'tJLATE, diminutive of 

 Plicate. 



PLUMOSE', like a feather, as the 

 slender brauches of the pappus 



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