Parenchyma 



A DICTIONARY 



Patulous 



sually insensitive to stimuli of 

 any kind. Compare Photo- 

 tonic. 

 PARfiN'CHtMA, all tissue com- 

 posed of cells which do not 

 have tapering extremities. Es- 

 pecially soft cellular tissue like 

 that of pith and the pulp of 

 leaves. Compare Prosen- 



CHYMA and SCLERENCHYMA. 



PAREN€HYM'ATOtJS, pertaining 

 to, containing, or resembling 

 parenchyma; spongy; porous. 



PA'RLE§ (pi. Pari'eteg), the wall 

 of any enclosing body. 



PARI'ETAL, belonging to or situ- 

 ated upon the wall, as ovules 

 or seeds upon the wall of the 

 pericarp. 



PARlPlN'NATE, see Abruptly 

 Pinnate. 



PAR<E §I0u"S, having male and 

 female " flowers" in mosses 

 placed close together. (Les- 

 quereux and James.) 



PARTED, divided nearly to the 

 base. 



PARTHEN06fiN'ESfS, the occa- 

 sional production of true spores 

 or seeds without fertilization. 

 Compare Apogamy. 



PAR THENOSPORE, a spore in 

 certain algte resembling a zygo- 

 spore, but produced without 

 conjugation. 



PAR'TIAL, secondary or subor- 

 dinate. 



PARTIAL IN'VOLUCRE, one 

 which subtends a subordinate 

 part of an inflorescence, as a 

 partial or secondary umbel. 



PAR'TIAL PEDtJN'CLE, a branch 

 of an inflorescence (pedicel) 

 bearing more than one flower. 



PAR'TIAL PET'IOLE, a division 

 of a petiole bearing one or more 

 leaflets; petiolule. 



PAR'TIAL tJTM'BEL, one of the 

 parts or secondary umbels of 



124 



a compound umbel; umbel- 

 lule; umbellet. 



PART'lBLE, capable of being 

 readily divided, but not divid- 

 ing spontaneously. 



PAR'TITE, see Parted. 



PARTl'TI&N, see Septum. 



PAR'Vtfs, relatively small. 



PASTEUR'IgM, a term applied by 

 some writers to the protective 

 or prophylactic inoculation of 

 the attenuated virus of certain 

 diseases, especially of hydro- 

 phobia, as devised by Louis 

 Pasteur. The older term Vac- 

 cination, however, is being very 

 properly extended to all opera- 

 tions involving this principle. 

 Compare Pasteurization. 



PASTEURIZATION, the preserva- 

 tion of wines or other ferment- 

 ed liquids by destroying the 

 ' fungi and their spores that 

 would produce further and 

 deleterious changes. This is 

 effected by prolonged heating 

 to a moderate degree (about 

 140° F.) for the purpose of 

 inducing the germination and 

 subsequent destruction of the 

 spores which are present. 



PATEL'LA (pi. PateTlse), a form 

 of sessile apothecium in li- 

 chens. (Obs.) 



PATEL'LlFdRM, kneepansh ap- 

 ed; in the form of a watch- 

 crystal or shallow saucer, espe- 

 cially if thickened like a knee- 

 pan. 



PATENT, spreading nearly at 

 right angles. 



PATH'FlNDER, see Nectar- 

 guide. 



PATHO^fiN'iC, disease - produc- 

 ing; pathogenetic. 



PAth6L'6&Y, see Vegetable 

 Pathology. 



PAT'ULOtfS, slightly spreading. 



