protogynous 



Prototroph 



(Schuchert); protog'ynous {yuv^, a 

 woman) = proterogynous ; Pro- 

 tog'y^y = Proterogyny ; Proto- 

 had'rome (+ Hadrome) = Proto- 

 XYLEM ; Protolieinicrypt'ophytes 

 (4- Hemicryptophytes), plants 

 whose aerial shoots have scales or 

 undeveloped leaves at the base, and 

 fully developed leaves towards the 

 middle of the stem, as in Veronica, 

 Epilobhim, etc. (Raunkiaer) ; Proto- 

 lep'tome (+ Leptome) =■ Proto- 

 PHLOEM ; Pro'tolog iK6yos, a word), 

 the original description of a genus, 

 species, or variety (Schuchert) ; 

 Protoryais {Kixris, a loosing), de- 

 composition of chlorophyll with 

 dissociation of CO2 under the in- 

 fluence of light (Wager) ; Proto- 

 merlstem (+ Meristem), the meri- 

 stein of the growing point forming 

 the foundation of a member ; Proto- 

 myce'lium (-f Mycelium), Eriks- 

 son's term for a plasmic mass formed 

 between the cells of parasitic fungi 

 as mycelial filaments or in the inter- 

 cellular spaces ; Protone'ma {vvfia, 

 a thread), the confervoid or plate- 

 like growth in the Mosses on which 

 the conspicuous plant is developed 

 as a lateral or terminal shoot ; adj, 

 protone'mal, also protone'inatoid ; 

 ~ Em'bryo, of Cutlcria multifida, 

 Grev. , a form of eml.ryo which re- 

 produces the normal plant (Church); 

 Pro'toneme = Protonema ; Proto- 

 phlo'em( + Phloem), the first-formed 

 elements of bast in a vascular bundle; 

 Pro'tophyll, Protophyl'lum {<pv\\ov, 

 a leaf), a leaf borne by a Proto- 

 coRM ; a cotyledon or primordial 

 leaf, especially used of a Cryptogam ; 

 Protophyl'line, Timiriazeff's alter- 

 native name for Protochloro- 

 phylline ; Pro'tophyt {(pvTov, a 

 plant), a plant of the sexual genera- 

 tion (Bower) ; Pro'tophyte, pi. Pro- 

 tophy'ta, the simplest plants, the 

 lower unicellular Cryptogams ; Pro- 

 tophyti'a, applied by Clements to 

 initial stages of succession in ])lant 

 growths; adj. protophjrt'ic ; Proto- 

 phytorogy {\6yos, discourse) = 



Palaeobotany; Pro'toplasm, Proto- 

 plas'ma (irAao-^uo, moulded), the vis- 

 cous living substance in plants, into 

 which all nourishment is taken, and 

 from which all parts are formed ; 

 various modifications of it have 

 special names ; Pro'toplast, the unit 

 of protoplasm capable of individual 

 action, a cell either with or without 

 a wall (Hanstein) ; protoplaa'tic, 

 used by Henfrey for proioplasmic ; 

 Protoplas'tid, an individual or pre- 

 sumable primitive type ; ProtoplaB'- 

 tin, Hanstein 's terra for a hypothetic 

 substance, the ultimate source of 

 vital movement and chemical com- 

 bination; Protopteridophy'ta (+ 

 Pteridophyta), a hypothetic primi- 

 tive group of Pteridophytes, from 

 which the known orders may be 

 supposed to have been derived 

 (Bower) ; Protosclerenoli'jrina (-f 

 Sc[,ERENCHYMA),used for certain col- 

 lenchyma which resemble true hard 

 bast ; the provisional collenchyma 

 of Haberlandt ; protosiphonogam'io 

 (+ siPHONOGAMic), uscd of the 

 germination of pollen on the ligule 

 or cone-scale in certain Gymnosperms, 

 thence passing to the micropyle ; 

 Pro'tospore {<riropa, a seed), (1) a 

 spore which develops a promycelium; 

 (2) certain energids or uninucleate 

 bodies in Pilolobus, etc. , the ultimate 

 product of cleavage (Harper) ; Pro- 

 tospor'ophyte {(pvrhu, a plant), C. 

 MacMillan's term for certain Crypto- 

 gan)3 not otherwise defined; Pro'- 

 tostele (+ Stele), a simple and 

 primitive form of stele ; it has been 

 applied to Haplo- and Acti no- 

 Steles (Brebner) ; adj. protoste'lic; 

 Pro'tostrophes, pi. {(TT^>o<pi), a turn- 

 ing), secondary spirals in the de- 

 velopment of leaves (Lindley) ; 

 Protothallog'amae, i)l. (+Thallo- 

 gamae), Ardissone's term to include 

 Angiosperms, Gymnosperms, and 

 vascular Cryptogams ; Prototharius 

 {edWos, a shoot) = Hyputhallus, 

 the first-formed stratum of a Lichen ; 

 Pro'totroph {rpotp^, nourishment), a 

 "lodger" in Lecidia intumescens, 



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