Postfloration 



praiinoas 



PoBtflora'tion {Jlos, flower), persist- 

 ence of the floral envelopes after 

 flowering (Lindman) ; postgen'ital 

 {genitalis, pertaining to birth), re- 

 fers to structures or characters which 

 appear subsequent to birth, as con- 

 trasted with congenital (Worsdell). 



posti'cal, pogti'cous, posti'ciis (Lat., 

 that which is behind), on the pos- 

 terior side, next the axis ; extrorse ; 

 Spruce and others use . " postical " 

 for the ventral or rooting face of 

 the stem of Hepaticae. 



postmeio'tio {post, after, -f meiotic), 

 after reducing divisions in karyo- 

 kinesis (Farmer) ; Post-phyriome 

 {(piWov, a leaf), Potonie's term for 

 leaves ; Postreduc'tion (+ Reduc- 

 tion), a reduction occurring in the 

 metaphase of the second mitosis 

 (Moreau) ; Post-spor'ophyll (-f 

 Sporophyll) ; Postsynap'sis ( + 

 Synapsis), the processes of nuclear 

 division succeeding the contraction 

 known as synapsis; adj. postsynap'- 

 tic ; Post-troph'ophyll (-f Tkopho- 

 phyll) ; Post-tropliospor'opliyll ( -|- 

 Sporophyll) ; these two and the 

 last but one are similar refinements 

 by the same author ; refer to Sporo- 

 PHYLL, etc. ; postventit'ioas, -tins 

 {post, after ; venio, I come), applied 

 to growths which arise subsequent 

 to their normal time ; cf. preven- 



TITIOUS. 



Pot'amad {iroTafihs, a river, -\- ad), a 

 river plant (Clements) ; Potami'um, 

 a river formation. 



Potamogetone'tum, a formation of 

 species belonging to the genus Po- 

 tamogeton. 



potamoph'ilus {irorafihs, a river ; <pi\eQ), 

 I love), river-loving (Clements) ; 

 Potamoplank'ton ( + Plankton), 

 the floating vegetation of inland 

 waters ; Potamophy'ta {(pvrhv, 

 plant), river plants (Clements). 



poten'tial {potentia, force, existing in 

 possibility, not in, action; used in 

 opposition to kinetic ; -' Gam'eto- 

 phyte, one which is functionally 

 asexual ; '-' Par'asite, a sapro- 

 phyte which can live equally as 



a 



a parasite; '-- Sap'rophyte, a para- 

 site capable of existing as a sapro- 

 phyte. 



Potetom'eter (ttot^js, a drink ; nhpov, 

 a measure), apparatus for measuring 

 the amount of water given off" by 

 the leaves of plants (Moll) ; Poto- 

 m'eter, (1) a similar instrument for 

 measuring the flow of liquids in 

 tissues (F. Darwin); (2) for measur- 

 ing absorption (Clements). 



pottia'ceous, allied to the moss Pottia ; 

 pott'ioid {iiios, likeness), resembling 

 the genus Pottia. 



Pouch = SiLiCLE ; ~ shaped, hollow 

 and bag-like, as the spur in many 

 Orchids ; diges'tive -^ ; used by Van 

 Tieghem and Douliot for the root- 

 cap of the lateral roots of Legum- 

 inosae and Cucurbitaceae. 



Powder-seed, minute seeds or spores 

 (Ridley). 



pow'dery, covered with a fine bloom, 

 as the leaves of Primula farinosa, 

 Linn. ; '^ Mil'dew, a destructive 

 disease of the vine, due to Uncinula 

 spiralis ; the conidial stage is known 

 as Qidium Tuckeri. 



prae-, or pre- {prae, before), expresses 

 priority in time or place. 



prae'coz (Lat., early ripe), appearing 

 or developing early ; precocious. 



Praeflora'tion {praefioratio, blossom- 

 ing before time) = Aestivation. 



Praefolia'tion {prae, before ; folium, a 

 leaf = Vernation ; Prae 'form (-f 

 Form), an early form, the original 

 ancestral strain (Kuntze) ; Prae'- 

 forms, in Rosa, Performs with 

 glandular teeth (Almquist). 



prae'morse, praemor'sus (Lat., bitten 

 at the end), as though the end were 

 bitten off". 



Praemuta'tion {prae, before, -f- Muta- 

 tion) ; the inner preparation of a 

 plant, for the outward manifesta- 

 tion ; Mutation (De Vries). 



praero'sas (Lat.), apparently gnawed 

 off". 



praeus'tus (Lat., burned at the end), 

 looking as if scorched. 



pras'inous, pros' imos (Lat.), grass- 

 green, leek-green. 



300 



