Pl«utt«n 



Pneumathodiom 



of their relative lightness (Forel); 

 (2) modified since to include root- 

 less, free-floating, submerged sper- 

 mophytes (Warming) ; --' -flora, 

 practically Phytoplankton. 

 plexeoblas'tus X (irA^f is, a knitting ; 

 ^Kaarhs, a bud), when cotyledons 

 rise above ground in germination, 

 but do not assume the appearance 

 of leaves ; plex'us (Lat., a twining), 

 a network. 

 PU'ca, pi. Pli'cae (jtlico, I fold or 

 plait), (1) a plait or folding; (2) 

 the lamella in Fungi ; (3) a disease 

 of entangled twgs, the buds pro- 

 ducing abnormally short shoots ; 

 pli'eate, plica' tus, folded into plaits, 

 usually lengthwise ; plioafilis (Lat. ), 

 the property of folding together ; 

 Pliea'tion, a fold or folding ; plio'a- 

 tive, pliccUi'vus =» plicate ; Plic'a- 

 ture, a fold or doubling ; plieat'u- 

 late, the diminutive of plicate 

 (Crozier) ; pli'ciform {forma, shape), 

 plait-like. 

 Plinth, the tapering free end of the 

 nucellus of certain fossil seeds; -^ 

 Jaok'et, the epidermis of the soft 

 integument surrounding the plinth. 

 Plococar'piom {ir\6Kgs, a chaplet ; 

 Kapiros, fruit), a fiuit composed of 

 follicles ranged round an axis ; 

 Plopocar'piom, an error for the last. 

 Ping, a growth of protoplasm which 

 closes the pore-openings in the cells 

 of certain Algae, homologous v/ith 

 the Stopper of Ballia (H.Gibson). 

 Plom-poek'ets = Bag-plums. 

 plnma'tus (Lat.), feathered, pinnate. 

 Plumba'gine, a crystalline principle 



in the roots of Plumbago. 

 plumb'eoB (Lat., leaden), lead-coloured. 

 Plume (Lat., the down of a feather), 

 Grew's term for the Plumule ; plu'- 

 mose, plumo'sus (Lat. ), feathered, as 

 the pappus of thistles. 

 Plu'mole, Plu'mula (Lat., a little 

 feather), the primary leaf-bud of an 

 embryo ; '^ -balb, a bulb produced 

 directly from germination of the 

 seed; cf. Runnbr-bulb (Blodgett); 

 pln'mular, relating to the plumule ; 

 '^ Ax'iB, the primary axis. 



plur-, plu'ri (Lat.), used as a prefix 

 for many or several, as plurilocular, 

 many-celled, etc. 

 Plur-an'nual (+ Annual), L. H. 

 Bailey's word for an annual plant, 

 which is so only by being killed by 

 the cold at the end of the season, 

 as Reseda odorata, Linn. ; pluri- 

 ceriular(+ cellular), many-celled; 

 pla'riceps {-ceps from caput, a head), 

 with more than one head, as many 

 roots ; plariciriate (+ ciliate), 

 having many cilia ; plurifoliate, 

 plurifolious (folium, a leaf), having 

 several leaves ; plurifo'liolate, with 

 several or many leaflets ; pluriflor'- 

 0U8, -rus iflos, fioris, a flower), with 

 several flowers ; plurigametlc ( + 

 Gamete), consisting of many gametes 

 or sexual units ; pluriloc'ular, pluri- 

 locula'ris {loculus, a little place), 

 many-celled ; pluripar'tite, pluri- 

 parti'tus {partitus, divided), deeply 

 divided into several nearly distinct 

 portions ; pluripet'alouB {vfraKov, a 

 flower-leaf), polypetalous ; pluri- 

 sep'tate {septum, an enclosure), with 

 several partitions ; plarispor'ous 

 {atroph, a seed), having two or more 

 seeds; pluriv'alent {valens, strong), 

 used of nuclear divisions in which 

 each element is composed of two 

 normal elements (Haerker); pluri- 

 val'vis (+ Valva), many-valved, 

 as opposed to uni-valved or follicu- 

 late ; pluriv'orous {voro, I devour), 

 Dietel s term for those Fungi which 

 inhabit indiff'erently hosts belong- 

 ing to widely difl'erent orders of 

 plants. 

 plus (Lat., more) or -f, applied to 

 spores Avhose nuclei are presumably 

 male (Blakeslee). 

 Pluviifrutice'ta, pi. (pluvia, rain; 

 fruticetum, a thicket), rain-scnib ; 

 Pluviiligno'sa, ^].{lignosus, woody), 

 rain-scrub and rain-forest combined ; 

 Pluviisyl'vae, pi. {sylva, a wood), 

 rain- forest. 

 Pneu'machore, an error for Pneuma- 



TODE. 

 P^xeumatho'dium {vvevfia, irv^v^aros, 

 breath, air), (1) cf. Pneumatode ; 



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