Fseudoramulus 



A DICTIONARY 



Pulvinus 



porary changeable branches of 

 a Plasmodium, or one of the 

 retractile appendages of the 

 zoospores (myxamcebae) of 

 Myxornycetes. 



PSEtJDORAM'uXUS, a false or 

 spurious branch found in cer- 

 tain Nostoehacese, consisting 

 of a youuger filament agglu- 

 tinated for a portion of its 

 length to an older one. 



PSEU'DOSPERM, an Achene or 

 Caryopsis. 



PSEtTDOSPER'MIC, having a sin- 

 gle seed so closely invested by 

 the pericarp that the whole 

 appears like a seed, as in 

 grasses and Composite; pseu- 

 dospermous. 



PSEtJDOSPER'MOtTS, see Pseudo- 



SPERMIC. 



PSEUDOSlfN'CARP, see Collect- 

 ive Fruit. Compare Syn- 

 carp. 



PTERiD'fUM, see Samara. 



PTEROCAR'POUS, wing-fruited. 



PTEROCAU LOU'S, having a 

 winged stem. 



PTE'ROID, wing-like. 



PTERdP'ODOtJS, having a 

 winged petiole. 



PTEROSPER'MOu'S, having the 

 seeds winged. 



PTflRlfGO NOtTS, having winged 

 expansions on the angles of the 

 stem. 



PTO'MALNE, any alkaloid formed 

 by the activity of bacteria. 



PtJ'BfiRTlr, the period when a 

 plant first begins to blossom. 



PtJBflR'ULENT, minutely pubes- 

 cent; covered with short, soft, 

 rather distant hairs. Com- 

 pare Holosericeus. 



PUBES'CENgE, soft and rather 

 short hairs; also extended to 

 hairs of all kinds. 



PUBESCENT, covered with fine, 

 soft, rather short hairs. 



PtJ<xl6N'lF6RM, dagger-shaped. 

 (Obs.) 



PTJL'LEt-SHAPED, see Troch- 

 lear. 



PuT'LULATING, budding; 

 sprouting; — now used only 

 for the budding or sprout- 

 ing of a cell, a special form 

 of cell-multiplication as seen 

 in yeast, in which a new cell 

 gradually swells out from an 

 older one. 



PtJLP, the soft, more or less juicy 

 portion of a fruit, or other 

 plant - substance of similar 

 structure. 



PuTVERA'CEOUS, dusty or pow- 

 dery on the surface. Com- 

 pare Pulverulent. 



PtJLVER'tJLENT, (1) powdery or 

 crumbly; (2) pulveraceous. 



PuX'VlNATE, shaped like a 

 cushion or pillow; having a 

 pulvinus. 



PuT' VlNAT£D, having a pulvi- 

 nus. 



PUXVfN"u*Lu"S (pi. Piilvin'uli), 

 diminutive of Pulvinus. Ap- 

 plied to various excrescences, 

 and also formerly to the sore- 

 dia of lichens. 



PuXVI'Nu'S (pi. Pulvl'ni), a term 

 applied to various cushion- 

 shaped or wart-like protu- 

 berances and swellings, as 



(1) the projection left by the 

 fall of a leaf in many plants; 



(2) the enlargement at the 

 base of the petiole in certain 

 Leguminosse which has the 

 power of contraction, pro- 

 ducing the "sleep" of leaves; 



(3) an enlargement formed by 

 the thickening of the bark at 

 the base of certain twigs, as in 

 arbor-vitse; (4) a thickened, 

 usually median, portion of 



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