Prolepsis 



OF BOTANICAL TERMS. 



Prosenchyma 



PROLEP'SlS, accelerated, antici- 

 pated, or hurried development, 

 as in the disease known as 

 " peach-yellows," where axil- 

 lary buds develop into branch- 

 es the first year. 



PROLIFERATION, development 

 in a proliferous manner. 



PROLIFEROUS, developing 

 buds, branches, flowers, etc., 

 from unusual places. Ap- 

 plied, for example, to a flower 

 from which another flower or 

 a branch proceeds, to a leaf 

 from which other leaves or 

 branches arise, to a bulbous 

 plant which abnormally pro- 

 duces bulbs upon the stem 

 above ground, or to any plant 

 which forms young plants in 

 unusual number about its base. 



PROLIFIC, fruitful. Sometimes 

 used in the sense of Prolif- 

 erous. 



PROLIFIC A TION, development 

 in a prolific or proliferous 

 manner; proliferation. 



PROLlG'EROUS, bearing repro- 

 ductive bodies of any kind. 



PROMINENT, standing out more 

 than usual, or beyond adjoin- 

 ing parts. 



PROMYCE'LlUM, in Urediuese 

 and Ustilaginese, a short and 

 short-lived mycelial growth 

 proceeding from a resting- 

 spore and upon which spo- 

 ridia are borne. 



PRONA.TE, inclined to grow 

 prostrate; somewhat prone or 

 prostrate. 



PRONE, lying flat, especially 

 with the face downward; 

 ventricumbent. See Pros- 

 trate and Supine. 



PRONUCLEUS, the nucleus of a 

 gamete. Compare Germ-nu- 

 cleus. 



PR&P, see Fulcrum. 



PROPAcULUM, see Propag- 



ULUM. 



PROPAg'ULA, pi., see Propag- 

 ulum. 



PROP AG' ULE, see Propagulum. 



PROpAG'ULUM (pi. Propag'ula), 

 a term applied to runners, off- 

 sets, and stolons — especially to 

 a slender runner or stolon ter- 

 minating in a new plant. 



PROPflND'ENT, hanging forward 

 and downward. 



PRdP'ER, true or individual. A 

 proper calyx, for example, 

 would be the true calyx of 

 an individual flower as op- 

 posed to the general calyx 

 (involucre) of a head. 



PROPER JUICE, a term formerly 

 used for any characteristic 

 fluid of a plant (especially if 

 thickened) in distinction from 

 the ordinary sap, as the ' ' milk " 

 of milk-weeds. Applied also 

 to the cambium or so-called 

 "descending sap" when in a 

 growing mucilaginous condi- 

 tion. 



PR6PH'ASE§, a term proposed 

 by Strasburger for all the 

 phenomena of karyokiuesis 

 up to the longitudinal split- 

 ting of the threads. Compare 

 Metaphases and Anaphases. 



PROPHLO'EM, the first-formed 

 elements of phloem in a fibro- 

 vascular bundle; protophlofim. 

 Applied also to the cylinder 

 of elongated cells with thick- 

 ened walls containing granular 

 protoplasm found in the seta 

 of certain mosses surrounding 

 the proxylem. 



PROSCOL'LA, an old term for the 

 retinaculum in orchids. 



PROSEN'CHYM A, tissuecom posed 

 of elongated cells with tapering 

 extremities in the wood and li- 

 ber. Compare Parenchyma. 



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