plnriploid 



polypodioid 



ploid, having multiple chromo- 

 somes (Nemec) ; plurisporang'iate, 

 with many sporangia ; pluriv'orous, 

 applied to parasitic fungi not con- 

 fined to one species (Thurston) ; 

 the condition is Pluriv'ory. 



Pneu'matocyst {kvotis, a pouch), 

 an air- cavity for flotation, as in 

 Fucus vesiculosus Linn. (Church). 



podocarpin'eous, resembling or allied 

 to Podocarjnis L'Herit. (Jeffrey). 



Podosyncar'py, when a double moss- 

 capsule has one half fully developed, 

 the other abortive (Worsdell). 



Pod 'sols, soils of a few inches of light 

 powder below the humus layer 

 (M. Vahl). 



Poe'tum, an association of Poa Linn. 



PoH, hydroxyl-ion concentration ; 

 alkalinity obtained by subtracting 

 pH value. 



Poi'on, or Poi'um, a meadow associa- 

 tion (Clements). 



polaribiloc'nlar, applied to two-celled 

 spores with thick median wall 

 traversed by a connecting tube; 

 polaciloc'ular is a shortened form. 



Poles, of embryo; the anter'ior ~, 

 in vascular plants the apex of the 

 axis ; the posterior ~, in bryo- 

 phytes the base of the sporogonium, 

 in vascular bryophytes, the tip 

 of the suspensor (Bower). 



PoMapIasy {TrXdaaco, I form), division 

 of a normally simple organ into 

 several of the like shape (Fermond). 



Pol'ien, add, Fur'ehen ~ (Furrow- 

 pollen) ; Pollina'tion ; Self -^, 

 (a) in the strictly botanical sense, 

 from the same flower; (6) in the 

 cultivator's sense, where it may be 

 effected by any flower of the same 

 variety in its vicinity ; ~ Pre- 

 senta'tion, the sensitive action of 

 the styles in Compositae dm-ing 

 pollination (Small). 



poloic'ous (ttoXvs, many ; oIkos, a 

 house), having both fertile and 

 barren flowers on the same and on 

 different plants (Lindberg) ; poly- 

 arthrodac'tylous {dpdpov, a joint; 

 hdicrvXoSf a finger), with ultimate 

 rays or da,ctyla each of more than 



two cells, as in some species of 

 Nitella Ag. ; Polycar'yon {Kapvov, 

 a nut), when a nucleus has many 

 centrioles or centrosomes ; poly- 

 chromoso'mic (+ Chromosome), 

 an idiomere having many chromo- 

 somes (Chodat) ; Polychro'my (Lind- 

 man) = Polychromatism ; poly- 

 clo'nal (-1- Clone), used of a popu- 

 lation of many clones, each 

 descended from an original ancestor 

 not asexually associated with the 

 original ancestors of the others 

 (Agar) ; polyclad'oos, employed 

 for " descended from two male 

 clones," as SpTiaerocarpus Bull. ; 

 Pol'ycots, an abbreviation of Poly- 

 COTYLEDONES ; polycoty'lous, with 

 many cotyledons, actual or appar- 

 ent ; Polyde'mics ( 8t]ij.ios, belonging 

 to the people), Clements's term 

 for sun and shade form of the same 

 species. 



Polygone'tam, an association of Poly- 

 gon wm Linn. 



porykont {kovtos. a pole), a flagellate 

 with many flagella (Church). 



Polylepide'tnm, an association in 

 which Polylepis Ruiz et Pav. is 

 predominant (Herzog). 



Polymast'igote {fidcm^, a whip), 

 having a tuft of flagella (Minchin) ; 

 Polym'ery {f^^pos, a part), the 

 production of a given character 

 by the action of two or more 

 independent factors or genes, each 

 of which when separate is able 

 to produce the same character 

 (Lang) ; it may be, cu'molative ~, 

 when the action of several genes 

 accumulates, or, non-cu'mulative 

 ~, one single gene can produce as 

 much as the many, Homomery 

 (Lang) ; Polyphylla'dea {<f)vXX6v, 

 a leaf), a polymeric individual, 

 with each component merid having 

 produced a leaf (Janet) ; pol'yploid, 

 when consisting of more than double 

 the number of chromosomes in 

 the haploid generation ; Pol'yploidy 

 is the condition. 



polypod'ioid, like the fern Polypodium 

 Linn. 



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