Kej^on 



Saltation 



Re'gion, add, (2) that occupied by a 

 formation complex (Waterman). 



Rejuvenesc'ence, add, (2) also a 

 synonym of Regeneration. 



BeFic, add, (2) what is left of former, 

 but now suppressed, vegetation 

 (Warming). 



Reliquefac'tion {re = back ; lique- 

 f'tcio, I melt), the resumption 

 of its normal state by proto- 

 plasm, after temporary hardening 

 (Sziics). 



Restitu'tion {restitutio, restoring;), 

 stimulated to renewal of lost parts 

 or organs (Harshberger). 



Retain'er, a double sheet of thin 

 paper containing a specimen 

 throughout t'he drying process 

 (Tansley and Chipp). 



Retard'ed Phase, the third in the 

 growth of yeast. 



Rever'sion, to recall ancestral features 

 of organization as an effect of 

 injury (Jeffrey); adj. rever'sionary. 



Rhachilla-flaps, upward outgrowths 

 from internodes c»f tlic spikelet axis 

 of grasses (Arber). 



Rhacomitrie'tum, an association of 

 Rhacomitrium lanuginosiim Brid. 

 (Moss). 



Rheoph'ilae {<f)i\eco, I love), algae in 

 running water (Ivanolf). 



Rhize (monosyll.), Chauvcaud's term 

 for the root clement in succession, 

 Rj, Rj, etc. ; as primary, secondary, 

 etc. ; Rhi'zoid, odd, (2) the cnd- 

 cell of a shoot of Cladophorn Kiifz., 

 which adapts itself to neighbouring 

 structures and interlocks into 

 Aegaguofil\f, ; Rhizolith'ophytes 

 (-f LiTiToiMiYTE), lichens (Wetter): 

 rhizomast'igoid (/iacrn^, a whip ; 

 etSo?, fojin), whip-like fla^ellum 

 or pseudcjiodium (Clnirch); Rhizo- 

 mat'icae, pi. root -stalk plants. 



Rhizophore'tum, an association of 

 mangroves, liJtizophorn Linn. 



rhizopod'ial, resemblinfi rhizopotls in 

 habit (Fritch); Rhizotham'nion, 

 Miehe's term for tubercles on roots 

 of CasiKirina Linn. 



Rhizu'menon {ovra, existing things), 

 of a rooting type (Gams). 



Rhodore'tum, an association of Rhodo- 

 dendron Rhodora J. F. Gmel. 



Rhyncospore'tum, an association of 

 Ryncospora alba Vahl. 



ring'porous, when the vessels in the 

 spring growth of wood are larger 

 than those" of later growth (Jeffrey). 



Roeste'lia-Stage, a form in rust-fungi 

 in which the peridium is elongated 

 and fimbriate, recalling the genus 

 Roestelia Rebent. 



Root'knobs, Syme's terra for orchid 

 tubers ; Roots, " double," lateral 

 roots in monocotyledons in the 

 interval between two protoxylem 

 clusters (Jeffrey). 



rose'form [dissylL], the shape of 

 the rose when in flower (Greene) ; 

 rosuia'ceous, pertaining to a Ros'ule, 

 a rose-like tuft of leaves, having 

 the form of an umbel (Herbert). 



rudiment'ary, add, (2) (a) vestig'ial, 

 {b) formerly applied to an organ 

 disappearing in evolution. 



Ru'gula, a longitudinal groove in 

 the upper lip of the flower, which 

 encloses the style of Justicia Houst. 

 (Lindau). 



saccharochemotrop'ic (+ Chemo- 

 TRoriSM), applied to pollen-tubes 

 attracted to sugar (Tokugawa) ; 

 cf. i-ROTEOCHEMOTRoric ; Saccharo- 

 myce'tes, fermenting fungi such 

 as beer-ycast, Saccharomyces cere- 

 vifiiae. Meyon. 



Sac'cospores (+ Spore), plants hav- 

 ing sack-like envelopes as dissemin- 

 ules (Clements). 



Sachs's Rule, " a cell-wall always 

 tends to set itself at right angles 

 to another cell-wall " (Thompson). 



Sadd, or Sudd, floating and matted 

 vegetation on the upper Nile, 

 blocking navigation. 



Salic'inase, an enzyme from almonds, 

 which decomposes Salicin. 



Salicomie'tum, cf. Salicornetum. 



SaLitrates, salt-steppes of Argentina. 



Sal'tant {saltus, a leap), a variable 

 form or mutant from the normal ; 

 salta'ted, varied ; Salta'tion, a muta- 

 tion or largo transilient (Poulton). 



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