proterogynouB 



Protograph 



when the pistils are receptive be- 

 fore the anthers have ripe pollen 

 (Delpino) ; Proterog'yny, the state 

 described; proteropet'alous {-niraKov, 

 a flower leaf), the state of obdiplo- 

 steraonous flowers, when the epi- 

 petalous whorl of stamens is the 

 inner (Schumann) ; proterosep'alous 

 (-|- Srpalum), as above, when the 

 whorl in question is the outer ; Pro'- 

 terotypes {rviros, a type), primary 

 types ; all specimens which have 

 served as the basis for descriptions 

 and figures of organisms ; further 

 divided into Holotype, Cotypr (or 

 Syntype), Paratype, Lectotype, 

 and Chirotype. 



Prothalla'tae (irpb, for; eixxos, a 

 sprout), Haeckel's term for Mosses 

 and vascular Cryptogams ; Prothar- 

 lial-cells, in Cycads usually two, the 

 second of which gives rise to the 

 antheridial cell ; ^ Tubes, embryo 

 sac tubes (Pearson) ; prothal'liform 

 {forma, shape), resembling a pro- 

 thallus ; prothal'line, prothal loid 

 {flZos, resemblance), pertaining to a 

 prothallus, or resembling one ; Pro- 

 thal'lium, pi. Prothal'lia, Prothal'- 

 lus, a thalloid oophyte or its homo- 

 logue resulting from the germina- 

 tion of a spore, usually a flattened 

 leafy expansion and bearing sexual 

 organs; bul'bous '-', a fleshy or 

 tuberous form ; expand'ed -^ , a fila- 

 mentous or flattened form (Farmer 

 and Digby); Prothallogam'ia {y6.iJ.os, 

 marriage). Camel's general term for 

 the vascular Cryptogams ; Prothario- 

 gama, vascular Cryptogams. 



protis'toid {Protista = Protophyta + 

 Protozoa, from irpwria-ros, the very 

 first ; e'lSos, resemblance), in cell- 

 division, not influenced by the 

 cells forming part of a complex 

 multicellular body (Hartog). 



Pro'toblast {irpwros, first ; ffhaarhs, a 

 bud), Baillon's term for the cell be- 

 fore the formation of a cell-wall, the 

 naked mass of protoplasm ; Proto- 

 caul'ome (4-Caulome), the first 

 developed axis, frequently evanes- 

 cent ; Protochlor'ophyll (+ Chloro- 



phyll), a pigment found in etiolated 

 leaves with carotin and xanthophyll 

 (Monteverde) ; ProtocMorophyriine, 

 a product of reduction of the green 

 principle of chlorophyll (Timiriazefl"), 

 cf. Protophylline ; Protochro'mo- 

 sonie(-f Chros'ioso'sik) in Hygrorybe, 

 a variable number of chromato- 

 phile granulations which at the end 

 of the prophase unite into two 

 chromosomes (Maire). 



protococ'coid {eUos, resemblance), re- 

 sembling the algal genus Proto- 

 coccus. 



ProtocoUench'jrma {irpcoTos, first. + 

 Collenchyma), the earliest formed 

 elements of collenchyma ; Pro'to- 

 corm {Kopfxhs, a trunk), (1) the 

 tuber of Phylloglossum and other 

 l.ycopods, the only branch which 

 develops into next year's tuber ; 

 (2) extended to cover the whole 

 embryo before the primary dif- 

 ferentiation is complete (Lyon), 

 cf. Metacorm ; adj. protocor'mal ; 

 Pro'toderm {S4pixa, skin), the rudi- 

 mentary dermal tissue derived from 

 the primary meristem of the apical 

 region ; Protodoch'ae (5ox^, recep- 

 tion), primary successions of plants 

 (Clements) ; Protoep'iphyte(-f Epi- 

 phyte), a plant which is primarily 

 an epiphyte pure and simple ; cf. 

 Hemiepiphyte ; Protogamophy'ta 

 {ydnos, marriage ; <pvrov, a plant), a 

 group of plants so named by C. Mac- 

 Millan, without definition ; Pro- 

 tog'amy, when gametes combine 

 without fusion of the nuclei (Dan- 

 geard) ; Pro'togene {yivos, descent), 

 K Pearson's term for the dominant 

 or A element in inheritance ; cf. 

 Allogene; Protogen'esis {y^viais, 

 a beginning), reproduction by bud- 

 ding; protogen'ic, protogenet'ic 

 {yivos, race, ofl'spring), in develop- 

 ment, structures formed when tissues 

 begin to diff"erentiate ; cf. hypero- 

 GENic ; Protogonid'ium (-f Goni- 

 dium), the first generation of a 

 succession of gonidia (A. Braun) ; 

 Pro'tograph {ypd<pa), I write), the 

 original figure of a species or variety 



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