bitten 



BlastograpMa 



bit'ten, abruptly ended, of roots or 



leaves, praemorse. 

 Bitt'er Orange Spot, on leaves and 

 fruit, due to Colletotrichum gloeo- 

 sporoides. 

 Bitt'er Pit, an abnormal spotting of 

 the fruit of the apple, ascribed to 

 peculiar external conditions (Pole 

 Evans). 

 bityp'ic {hi, two ; rvvos, a type), 

 applied to those genera vsrhich con- 

 sist of two widely separated species ; 

 biv'alent {valeiis, strong), having 

 hypothetically two chromosomes in 

 each of the apparent chromosomes, in 

 nuclear reduction divisions ; bi' valve, 

 hivaVvis {valvae, leaves of a door), 

 having two valves, as some capsules ; 

 Bi' valve, "a capsule of two valves " 

 (Crozier) ; bival'ved, (1) used of 

 Diatoms, as possessing two valves ; 

 (2) the indusia of certain fenis, as 

 Bicksonui; bival'vular = ni valve ; 

 bivasc'ular {vasculum, a vessel), with 

 two vessels ; bivert'ed {veHo, I turn), 

 0. Muller's tenn for an inverted 

 diagonal symmetry in diatoms ; 

 bivit'tate {vittae, fillets), having two 

 partitions which appear as bands or 

 fillets. 

 Bix'in, the colouring-matter of Bixa 



Orellana. 

 Bizzari'a (ItaL, extravagant whim), a 

 hybrid between the orange and the 

 citron which has the character of 

 both in juxtaposition, but without 

 blending (Heinig). 

 Black Bligbt, Capiodium citricolum 

 on Citrus leaves ; ^ Earth, rich in 

 mineral salts, found in Asiatic 

 steppes and in North America 

 (Warming) ; ^ Bjiot, a devastating 

 disease on plum and cherry trees, 

 caused by Ploivrighlia niarhosa ; 

 '~ Leg, a bacterial disease of potatoes 

 due to Bacillus phylophthorus ; -^ 

 Root Eot, due to Thielavid basicola, 

 Zopf ; '-' Rot, diseases from Gtiig- 

 nardia Bidwdlii and Fseudomonas 

 campestris ; ~ Rust, Puccinia gra- 

 minis, a universally distributed rust 

 attacking cereals ; '~ Scab, of pota- 

 toes, caused by a Synchitrium, 



Blad'der, (1) Grew's term for a cell ; 

 (2) a hollow membranous appendage 

 on the roots of Utricularia, which 

 entraps water insects ; (3) similar 

 gi-owths in the frond of some Algae, 

 serving as floats ; (4) an inflated 

 membranous pericarp, as in Phy- 

 salis ; -^ Plums, an abortion of the 

 fruit of plums, the stone being 

 wanting, and a thin bladder repre- 

 senting the rest of the fruit ; 

 blad'dery, thin and inflated. 

 Blade, the limb or expanded portion 



of a leaf. 

 blanched, (1) the whitened appearance 

 of leaf or stem from the want of 

 iron ; (2) artificially produced by 

 exclusion of light, the green chloro- 

 phyll pigment not being developed 

 in either case. 

 Blaste'ma ()3Ao<TT7j^a, a sprout), (1) 

 originally the axis of an embryo, 

 the radicle and plumule, excluding 

 the cotyledons ; (2) % the Lichen- 

 thallus ; blaste'mal, (1) rudimentary; 

 (2) asexual (White) ; blastemat'icus, 

 thalloid ; Blaste'sis, the reproduc- 

 tion of the thallus of Lichens by 

 gonidia (Minks). 

 Blastid'ia {^Kaarhs, shoot), Schleiden's 

 term for secondary cells gtiifrated 

 in the interior of another cell ; 

 daughter-cells ; Blast'idules, M'Nab's 

 expression for all reproductive 

 bodies which are not spores, but 

 produced asexually, as gemmae, 

 propagula, etc. ; blastocarp'ons 

 (Kapirbs, fruit), applied to those 

 fruits which gemiinate within the 

 pericarp; Blast'ochore (x^^P^^) 

 separate), plants distributed by 

 oflshoots (Clements) ; Blastocol'la 

 {K6\\a, glue), the balsam which is 

 produced on buds by glandular hairs 

 j (Hanstein) ; Blastogen'esis {ytviais, 

 beginning), M'Nab used this for all 

 methods of asexual reproduction 

 which are not due to Sporogenesis ; 

 blastogen'ic {-y^vos, off'spring), em- 

 ployed by Weisniann for those 

 characters which have originated 

 from changes in the germ (L. H. 

 Bailey) ; Blastograpb'ia {ypa.<pu, I 



52 



