Sorus 



Sperm 



So'rus, pi. So'ri (crwpos, a heap), (1) 

 a cluster of sporangia in Ferns ; (2) 

 in Sy nchitrieae, a group of sporangia 

 from a single swarm-cell ; (3) a 

 heap of soredia forming a powdery 

 mass on the surface of a thallus. 



spadic'eous, spadi'ceus (cnra&f , a palm- 

 branch), (1) as to colour, date- 

 brown ; (2) having the nature of, 

 or bearing a spadix ; spa'dicose, 

 resembling a spadix ; Spa'dix, a 

 spike with a fleshy axis, as in 

 Aroids. 



Span, usually about nine inches, 

 between the extremities of the 

 thumb and little finger, DODKANS ; 

 sometimes the small span of seven 

 inches is intended, the space be- 

 tween the thumb and middle finger 

 when stretched out. 



Spanan'thus (ffwavos, scarce, dV0os, a 

 flower), having few flowers. 



Sparga'nium-cor'tex (the genus Spar- 

 ganium, + CORTEX), applied to 

 fossil stems with a vertical system 

 of fibrous strands which do not 

 anastomose, as Mcdullosa. 



spart'oid (awa-pros, esparto grass, 

 eI5os, resemblance), used by Fayod 

 for persistent mycelium which is 

 corticated. 



sparse, spar'sus (Lat. , spread open), 

 scattered ; sparsiflo'rus (fios, Jloris, 

 a flower), with scattered flowers ; 

 sparsifo'lius (folium, a leaf), with 

 scattered leaves. 



Spathe, Spath'a (awdd-rj, a spatula), a 

 large bract enclosing a flower 

 cluster, usually a spadix ; ~ Valves, 

 the bract-like envelopes beneath 

 the flowers in certain Mono- 

 cotyledons, as Allium and Nar- 

 cissus ; spatha'ceous, -ceus ( + aceus), 

 spathe-bearing, or of the nature 

 ot a spathe ; spathae'us, J having 

 a very large spathe (Lindley) ; 

 spa'thal, spa'thate, spathed, fur- 

 nished with a spathe ; Spathel'la, 

 an old name for the glumes of 

 grasses, sometimes also the paleae 

 were included ; Spathel'lula, a 

 palea of a grass ; Spathil'la, a 

 secondary spathe, as in the 



inflorescence of Palms ; spa'those, 

 spathe-like ; spath'ulate, spat hu- 

 la' tus, spat'ulate, oblong, with the 

 basal (proximal) end attenuated 

 like a druggist's spatula. 



Spawn, mycelium. 



Spe'cies (Lat., a shape, kind, or sort), 

 the particular kind, the unit in 

 classification, the aggregate of all 

 those individuals which have the 

 same constant and distinctive 

 characters ; they may be distin- 

 guished as biologic ~ , morpho- 

 logic ~, or physiologic ~, ac- 

 cording to the basis of discri- 

 mination ; ~ Hy'tarid, a hybrid 

 between two species of the same 

 genus ; ~ Soror'es, Schroter's term 

 for any two species of Uredineae 

 which inhabit two distinct hosts, 

 but show no morphological differ- 

 ence, as in Puccinia ; specific, 

 relating to a species ; ~ Cen'tre, 

 the particular spot where the 

 species is supposed to have origin- 

 ated ; <- Char'acter, the diagnostic 

 which separates one species from 

 another ; ~ Name, the Latin ap- 

 pellative appropriated to a given 

 species, usually an adjective, but 

 sometimes a substantive used ad- 

 jectivally. 



Specimen (Lat., an example), a plant 

 or portion of one, prepared for 

 botanic study. 



spec'tans (Lat., looking), " se in- 

 vicem spectantia folia," = opposite- 

 leaved. 



I Spec'trophore (spectrum, an appear- 

 ance, <j>opeu, I carry), apparatus 

 designed by Reinke to determine 

 the action of the different rays of 

 light in the elimination of oxygen 

 by plants. 



Speir'anthy (a-rre'ipa, a twist, &i>6os, a 

 flower), when a flower assumes a 

 twisted form. 



Speire'ma (o-Treip^a, a fold or coil), 

 in Lichens, a gonidium. 



Sper'gulin, a fluorescent substance 

 occurring in the seeds of Spergula. 



Sperm (aw^pfj-a, a seed) Cell, a male 

 reproductive cell, as (a) an anther- 



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