lepiota 



Leucitd 



genus of Agarics, having been pro- 

 posed by Persoon for a section of 

 Agaricics ; Le'pis, a scale. 



Lepis'ma {\(iri<Tua, peeled bark), a 

 membranous scale in some Ranuu- 

 culaceae, an apparently aborted 

 stamen in Pneoiiia papaveracca, 

 Andrz. ; several of them enclose 

 the ovary. 



Lep'ra {\evpa, leprosy), a white mealy 

 matter extruded from the surface 

 of some plants ; lep'rose, lep'roua, 

 lepro'sus, scurfy. 



lep'rarioid, resembling the old Lichen 

 genus Lepraria. 



leptocen'trio (+ Leptome ; centrum, 

 the middle), when a vascular bundle 

 has the leptome in the middle, with 

 the hadrome round it (Haberlandt). 



leptoclad'ous {Keitrhs, thin; K\dSos, a 

 branch), slender branched. 



leptoder'matous,leptoder'mous(\6irT^j, 

 thin, delicate ; Sepfia, skin), thin- 

 coated, used of moss-capsules when 

 pliable ; Lep'toforms (forma, shape), 

 heteroecious Fungi having teleuto- 

 spores only, which as soon as they 

 arrive at maturity germinate on 

 living plants. 



lepto'gioid (cISoy, resemblance), like 

 the Lichen genus Leptogium. 



Leptogonid'ium (AcTrrbs, thin, delicate ; 

 + Gonidium) = MicROGONimuM ; 

 Lepfoid (elSoj, resemblance), a group 

 of six to eight polygonal cells, re- 

 sembling sieve-tubes, in the leptome 

 of certain Bryophytes (Tansley and 

 Chick) ; Lep'tome, an abbreviation of 

 Leptomes'tome{/*e(rT?»s, filled), Haber- 

 landt's expression for the phloem- 

 like portion of the vascular bundles 

 in vascular plants; Lep'tome- 

 mantle, fusion of several leptoida 

 into a layer ; ^ Strand, modifica- 

 tion of the leptome cylinder ; lep- 

 tomat'io, pertaining to the leptome ; 

 Lep'tomin, a substance found in the 

 leptome of some plants, especially 

 in the sieve-tubes and laticiferous 

 vessels, the presumed function being 

 to convey oxygen (Raciborski) ; 

 Leptoae'ma {vrifxa, thread), the deli- 

 cate thread formed during the tran- 



P 2 



sition from a reticulum to a spirem 

 in synapsis ; Leptonisa'tion, the re- 

 duction of the nucleus into a finely 

 filamentous condition, from reti- 

 culum into spirem ; Leptophlo'em 

 (-{- PHLoiiM), rudimentary phloem, 

 for storage or conduction of food 

 material (Vaisey) ; leptophyl'lous, 

 -lus, {<pv\\ov, a leaf), slender-leaved; 

 Leptopuccin'ia, a group of the genus 

 Fticcinia, which produces only teleu- 

 tospores; leptosporan''giate (o-Tropck, 

 seed ; ayyeiop, a small vessel), 

 having leptosporangia ; Leptospor- 

 an'giom, a sporangiimi derived from 

 one superficial cell, as in the true 

 Ferns, and not from a group of cells 

 as in Ophioglossaceae ; lep'totene 

 (jivav, a tendon), tvhen the dividing 

 nucleus is extended into a mass of 

 fine filaments ; leptoti'chus (rerxoj, 

 a wall), thin-walled, applied only to 

 tissue ; Leptoxy'lem (4- Xylem), the 

 water-conducting tissue of the sporo- 

 phy te of Mosses : functional w ood 

 { Vaizey) ; lepta-zygotene (+ zygo- 

 tene), a transition stage between the 

 delicate single threads or leptonema 

 of the nucleus and their paired 

 arrangement in the zygonema. 



Lepyrophyriy (A6Vi»poj/,a scale; <pv\\oy, 

 a leaf), Morren's term for arrest of 

 the testa in the leaf-stage. 



les'keoid, resembling the moss-genus, 

 Leskea. 



le'thal [lethalis, deadly) Coeffic'ient ; 

 infe'rior or supe'rior, the lowest or 

 highest temperatures which are 

 fatal to the vital functions of a given 

 organism (C. Jones). 



lett'ered, vpith spots resembling letters; 



Cf. GRAMMICUS. 



leucan'thous, -thus {\evKbs, white or 

 grey), white-flowered ; Leu'cia or 

 " Amidocaproic acid" is a white 

 substance, first found in animals, 

 afterwards found in plants ; Leu'- 

 cite, Van Tieghem's name for Leuco- 

 plast; he further modifies the term 

 by prefixing am'ylo-, chlo'ro- 

 chro'mo-, ela^io-, ox'aii-, for various 

 modifications ; furthermore, act'ive 

 <^, or pas'give or reserve' '--, accord- 



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