Haplospore 



Hecistotherm 



seed), (1) a sitaple spore in Lichens ; 

 (2) an asexual spore (Benson) ; haplo- 

 ste'monous (o-r^/iajv, a stamen), with 

 a single series of stamens in one 

 whorl ; Hap'lostele ((tttjXtj, a pillar), 

 a simple stele consisting of xylem 

 surrounded by phloem (Brebner) ; 

 Hap'lotjrpe {tvttos, a type), used of 

 a single species in its original place 

 of publication ; adj. haplotyp'io ; 

 haploxyric {^v\ov, wood), having a 

 single vascular bundle in the leaf, 

 e. g. Fimis excelsa, Wall. 



Hap'teron, pi. Hap'tera,(fiirTa>, I fasten 

 .upon), Warming's term for organs 

 of attachment which do not contain 

 vascular tissue, as in Podostomaceae ; 

 Hap'tere, C. MacMillan's term for 

 Hapteron, a holdfast ; hapter'ic, 

 of the nature of a holdfast ; Hapto- 

 morph'ism, stimulus by contact ; 

 Haptotax'is, Haptot'ropism {rpS-nos, 

 direction), the curvature induced in 

 climbing plants by the stimulus of 

 a rough surface (Czapek). 



hard'y, enduring without protection ; 

 not injured by the climate. 



harmon'ic {ap/xovla, consonance), ap- 

 plied by Boulger to the development 

 of large gi'oups characteristic of 

 continents. 



Harmo'sis {ap/j-oa-is, an adapting), re- 

 sponse to stimulus, both of adjust- 

 ment and adaptation (Clements). 



harpid'ioid, (1) resembling or allied 

 to the Harpidium section of Hyp- 



. num ; (2) similarly the Lichen genus 

 Harpidium. 



has'tate, hasta'tus {Jiasta, a spear\ 

 halbert-shaped, sagittate, with the 

 basal lobes turned outward ; lias'ti- 

 form {forma, shape), spear-sh9,ped, 

 hastate ; has'tile, hasti'lis (Lat., 

 like the shaft of a spear), used for 

 hastate. 



hatch'et- shaped, dolabrifonn. 



Haulm, Halm, Haum, (1) the culm of 

 grasses ; (2) the stem of herbaceous 

 plants. 



Haustor'ium {fcaustor, a drawer), (1) a 

 sucker of parasitic plants ; (2) used 

 by Komarow for an appendage of peri- 

 tliecia ; (3) a structure arising from 



the secondary nucleus of Lathraea, 

 the embryo sac containing two 

 haristoria, one equatorial, the other 

 micropylar (Chodat) ; Haustor'ia 

 (pi.) appendicula'ta, when they arise 

 from a protrusion of %he^ hyphae, 

 appressors ; '^ exappendicula'ta, 

 when they arise direct y from the 

 hyphae without much contor4:ion at 

 the point of origin; '- lobula'ta, 

 lobed appressors. 



Haust'rum (Lat. machine for drawing 

 water), the bulbous nursing foot of 

 developing plants ; an organ of 

 attachment and temporary nutri- 

 tion ; adj. hanst'ral. 



Haut'schicht fGer.), the layer of cell 

 protoplasm known as Ectoplasm. 



Head, (1) an inflorescence; the capi- 

 tulum of Composites ; (2) formerly 

 used for the theca of Mosses ; ~ Cell, 

 the capitulum of Chara; head'ed, 

 capitate. * 



Heart, used by Grew for the centre, 

 as heart of oak, the duramen ; '~' 

 shaped, cordate ; -^ Eot, a disease 

 of ) line-apples of unknowm origin ; 

 -^ Wood, the innermost and oldest 

 W'ood next to the pith, the duramen ; 

 '^ "^ Rot, Polyporus hispidus, the 

 cause of this disease on fruit trees ; 

 it attacks the wood near the ]»ith 

 and spreads towards the sap-wood. 



Heath, an expanse of peaty or sandy 

 soil, with a predominance of Cal- 

 luna ; r^ Associa'tion, a stable ])rin- 

 cipal growth of heather, without 

 trees ; Heathland, a delayed or 

 abortive stage of Moorland. 



Heath'er-moor, Calluna is dominant, 

 often with Vaccinium Myrtillus. 



Heaut'otype (Ioutou, of his own ; 

 rviros, a type) applied to a specimen 

 of a previously described and named 

 species selected by the author, not 

 being otherwise recognizable : meant 

 to supersede Autotype. 



hebecar'pus (^/3rj, puberty ; Kapvoiy 

 fruit), having the fruit covered with 

 downy pubescence. 



heb'etate, hebeta'tus (Lat., blunted), 

 having a dull or blunt or soft point. 



Hecist'otherm = Hekistotheum. 



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