Secondary Meristem OF BOTANICAL TERMS. 



Seed-variety 



SECONDARY MER'tSTEM, meri- 

 stem in an organ or part after 

 its first development is com- 

 pleted and by means of which 

 further growth is effected, as 

 cambium. Compare Primary 

 Meristem. 



SECONDARY NU'CLEUS, the 

 "nucleus of the embryo-sac," 

 resulting from the union of 

 the two polar nuclei. 



SECONDARY PEDUNCLE, the 



stalk of a branch of an inflo- 

 rescence bearing more than 

 one flower; partial peduncle. 

 Compare Pedicel. 

 SECONDARY PET'fOLE, the 

 stalk of a leaflet; partial 

 petiole petiolule. 

 SECONDARY ROOT, a lateral root, 

 especially one growing from 

 the stem. Compare Primary 

 Root and Aerial Root. 

 SECONDARY SPORE, a spore 

 borne on a promycelium (spo- 

 rklium), or one derived imme- 

 diately from another spore. 

 SECONDARY STRUCTURE, the 

 structure or condition of a 

 plant or organ after its first 

 year, or after it has grown be- 

 yond its first formed state. 

 Compare Primary Struc- 

 ture. 



SECONDARY WOOD, the portion 

 of the wood or xylem which 

 is formed after the primary 

 xylem, or after the formation 

 of the cambium ring. Com- 

 pare Primary Wood. 



SECONDINE (obs.), see Sec- 

 undine. 



SECTILE, divided into separable 

 parts. 



SE'CUND, either unilateral (one- 

 ranked) or homomalous (one- 

 sided), i.e., having lateral or- 

 gans upon one side only, or all 

 turned to one side. 



SECUNDINE, the secondary or 

 inner coat of an ovule, called 

 tegmen in the seed. By some 

 authors this inner coat, since 

 it is first formed, is called the 

 Primine and the outer coat the 

 Secundine 

 SEED, a fertilized ovule: a struc- 

 ture enclosing when mature a 

 rudimentary plant (the embryo) 

 which is protected while iu a 

 dormant condition, and fur- 

 nished with nutriment, either 

 in its cotyledons or around 

 them, with which to begin 

 the process of growth. 

 SEED'A&E, a term proposed by 

 L. H. Bailey for the process, 

 state, or condition of being 

 jiiopagated by seed. 

 SEED-BUD, an old term used both 



for ovule and ovary. 

 SEED-COAT, the covering of a 

 _seed. See Tegmen and Testa. 

 SEED-LEAF, see Cotyledon. 

 SEED'LlNG, (1) a plant produced 

 from seed, iu distiuction from 

 one produced in any other 

 manner, either naturally or 

 artificially; (2) a young plant 

 produced from seed, in dis- 

 tinction from one of consid- 

 erable age or size. 

 SEED-LOBE, see Cotyledon. 

 SEED-SPORT, a sport which origi- 

 nated from seed ; seminal sport. 

 Compare Bud-sport. 

 SEED-VARIA'TION, a variation 

 derived from seed instead of 

 buds. Compare Bud - vari- 

 ation. 



SE2D - VARI'ETY, any variety 

 which originated from seed, 

 either suddenly (seed - varia- 

 tion or seed-sport) or gradu- 

 ally in the ordinary way, and 

 is propagated in any manner. 

 _Compare Bud-variety. 



SEED-VESSEL, see Pericarp. 



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