Pistillody 



OF BOTANICAL TERMS. 



Plasmolytic 



Pf S'Tf LLOD¥, the transformation 

 of other organs into pistils. 



PlT, (1) a small depression, or a 

 thin spot in a cell-wall; (2) the 

 endocarp of a drupe containing 

 the kernel or seed; stone. See 

 Bordered Pit and Bordered 

 Pore. 



PIT-CHAM'BER, the cavity of a 

 bordered pit upon one side of 

 the closing membrane. 



PITCHER, see Ascidium. 



PITCH'ER SHAPED, when ap- 

 plied to a corolla means tubu- 

 lar with a contracted throat, as 

 in Vacciuium; urceolate. Ap- 

 plied to other organs it means 

 shaped more or less like an 

 ordinary pitcher with a lip or 

 spout at the top, as the leaf in 

 the various "pitcher-plants." 

 PiTH, the column or cord of 

 soft cellular tissue at the cen- 

 tre of an exogenous stem; me- 

 dulla. 

 PlT'TflD, marked with small 



depressions. 

 PJT'TED VES'SflLS, vessels hav- 

 ing thickenings in the form of 

 a network with polygonal 

 meshes, leaving thin spots or 

 pits; dotted ducts. Compare 

 Bordered Pit. 

 PITtl'ITOu'S, pertaining to pitch 



or mucus. 

 PLACENTA, the part of the ovary 

 to which the ovules are at- 

 tached; the tissue from which 

 the sporangia arise in ferns. 

 Compare Hymenium. 

 PLAgfiNTA'TION, the arrange- 

 ment of the seeds in the peri- 

 carp; the arrangement of the 

 placenta itself. 

 PLACEN'TIfSRM, in the form of 

 a double concave lens; i.e., like 

 a circular thickened disk de- 

 pressed in the centre upon both 

 sides. 



PLAdtfOTRdP'fC, growing at an 

 angle from the vertical or from 

 the axis either upward or down- 

 ward. Compare O r t h o - 



TROPIC. 



PLAIN, said of a margin which 

 is not undulate in any degree, 

 though it may be sinuate. (E. 8. 

 Goff.) 



PLAIT'fiD, see Plicate. 



PLANE, flat. 



PLANE OF iNSER'TION, a plane 

 which passes through the point 

 of insertion of a lateral mem- 

 ber, as a leaf, and coincides 

 with the main axis and the 

 axis of the lateral member. 



PLANE OF StM'METRt, any 

 plane which divides an object 

 into symmetrical halves. 



PLAN'OGAMETE, a ciliated or 

 otherwise motile coalescing 

 (sexual) cell ; zoogamete. 



PLANT-CANE, a sugar-cane pro- 

 duced directly from seed, in 

 distinction fromRatoon, which 

 see. 



PLANT'LfiT, a small or young 

 plant. 



PLANT pATHdL'OGt, see Vege- 

 table Pathology. 



PLA§M (or Plas/ma), see Proto- 

 plasm. Also used for nutri- 

 tive cell-fluids of all kinds. 



PLA§'MAS0ME, a protoplasmic 

 corpuscle. 



PLA§MAT'fC, serving for growth ; 

 plastic. (Rare.) 



PLASMODIUM (pi. Plagmo dia), a 

 mass of naked multinucleated 

 protoplasm exhibiting amoe- 

 boid movement; the vegeta- 

 tive body in Myxomycetes. 



PLA§m6L'1TSIs, the contraction 

 of protoplasm under the in- 

 fluence of reagents. 



PLA§MOLtT'IC, pertaining to 

 plasmolysis. 



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