Leptophloem 



OF BOTANICAL TERMS. 



Ligulifiorous 



cular cryptogams. Compare 

 Hadrome. 



LEPTOPHLO'flM, a term applied 

 by Vaizey to a portion of the 

 central fascicle or strand in the 

 seta of Polytrichaceae (in 

 mosses) which he considers 

 to be rudimentary phloem. 



LEPTOPHYL'LOTJS, having scale- 

 like leaves. 



LEPT6SPORAN'6ltJM, a sporan- 

 gium derived from a single 

 epidermal cell, as in the true 

 ferns, in distinction from one 

 derived from a group of epi- 

 dermal cells (eusporangium), 

 as in the Ophioglossaceae and 

 Marattiaceae. 



LEPTOXY'LEM, so-called rudi- 

 mentary xylem in the seta of 

 Polytrichacese. (Vaizey.) 



LEU-, or LEUCO-, a prefix from 

 the Greek, meaning white. 



LEUCAN'THOUS, white-fJowered. 



LEU'^ITE, see Leucoplast. 



LEU'COPLAST, a colorless proto- 

 plasmic granule (plastid) such 

 as those in which starch origi- 

 nates; starch-builder; leuco- 

 plastid; amidoplast; anaplast; 

 leucite proper. See Plastid. 



LJ&V'IgATE, see Levigate. 



LE'VlS, see L,evis. 



LI'ANE, a woody climbing or 

 twining plant of considerable 

 size; applied only to those 

 which abound in some tropical 

 forests. 



LIBER, the inner layer of bark, 

 consisting chiefly of the phloem 

 of the fibrovascular system and 

 therefore containing the bast- 

 tissue; bast. 



LI'BRIFORM CELL, a narrow 

 thick-walled cell of woody 

 tissue resembling bast; wood- 

 fibre. 



LID, see Operculum. 



LID-CELLS, terminal cells of the 

 neck in some archegonia which 

 for a time close the canal; stig- 

 matic cells. 



LIFE-gY'CLE, the course of de- 

 velopment from any given 

 stage, as the spore or seed, 

 back to the same stage again. 



LlG'NEOTJS, woody, or pertain- 

 ing to wood. 



LlGNjFlcA'TION, the process of 

 becoming converted into wood; 

 sclerosis. 



LiG'NlNE, a secondary deposit, 

 forming the greater part of the 

 bulk of ordinary wood. It 

 contains less oxygen than cel- 

 lulose, and according to Pay en 

 has the formula C35H24O20. 

 It is also written Lignin, and 

 is the same as Sclerogen. 



LlG'NtJM, see Wood. 



LfG'ULA (pi. Lig'ulae), see Lig- 



ULE. 



LIG'ULATE, (1) having a ligule; 

 (2) strap - shaped, i.e., linear 

 and about four to six times as 

 long as broad. 



LlG'ULATE FLO'RET, one of the 

 marginal flowers of a head in 

 Compositae, bearing a ligulate 

 or strap-shaped corolla; ray- 

 floret. Compare Tubular 

 Floret. 



LIG tJLE, (1) a strap-shaped co- 

 rolla in Compositae, such as 

 those on the outer margin of 

 the head in most sun-flowers; 

 (2) a membranous appendage 

 on the inner side of the leaf in 

 many grasses and some other, 

 endogens at the top of the 

 sheath. 



LIGULiFLO'ROtTS, said of a head 

 of flowers in Compositae which 

 contains ligulate flowers only, 

 as in Chicory. 



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