HENDERSON'S HANDBOOK OF PLANTS. 



BIC 



of two secondary petioles bears a pair of 

 leaflets. 



Bu-onjugate-pinnaie. When each of two 

 secondary petioles is pinnated. 



Bicornis, Bicornute. Having two horn-like 

 processes. 



Btcrural. Having two legs or narrow 

 elongations, as the Up of the Man Orchis. 



Bicuspidate. Twice-pointed. 



Bidentaie. Having two teeth, or a double 

 row of teeth. 



Bidigitaio-pinnate. The same as Biconju- 

 gate-pinuate. 



Biduous. Lasting two days only. 



Biennial. Lasting two years. A biennial 

 plant requires two years to form its flow- 

 ers and fruit; growing one year, and 

 flowering, fruiting, and dying the next. 

 This, however, is not true of all climates. 

 Many plants that are classed as biennials 

 in England, when sown in the southern 

 parts of the United States, or in a hot- 

 bed in March, at the North, and planted 

 out in summer, will flower, seed, and die 

 just as many annuals do. 



Bifarious, Bifariam. Arranged in two 

 rows. This term is frequently applied to 

 flowers and to ovules. 



Bifariously Imbricated. Overlapping in two 

 rows. 



B if ems. Double-bearing; producing flow- 

 ers or fruit twice in the same season. 



Bif orate. Having two pores or apertures. 



Biforines. Oblong cells, with an aperture 

 at each end, through which raphides are 

 expelled. See Raphides. 



Bifidus, Bifid. Divided half way down into 

 two parts. 



Biflorus. Having two flowers on the same 

 footstalk. 



Bifoliate. Having two leavea 



Bif Violate. Having two leaflets only to a 

 leaf, as in some compound leaves. 



BIG 



Bifolliculm. A double follicle. 



Bifr&ns. Growing on both surfaces of a 

 leaf. Also appearing equally like two dif- 

 ferent things. A term seldom used. 



Bifurcate. Twice forked; having two pairs 

 of diverging horn-like arms. 



Bigeminate. The same as biconjugate, 

 which see. 



Bigeminous. In two pairs; as the placentae 

 of many plants. 



Bigeners. Mule plants obtained by cross- 

 ing species of different genera. This 

 kind of hybridism has been said to be 

 impossible. Kolreuter in particular ad- 

 duced examples of failure in the attempt; 

 but modern experiments seem to show 

 the possibility of such a union. 



Biglandular. Double-glanded. 



Biglumis. Consisting of two of the scales 

 called, among grasses, glumes. 



Bignoniacece, ( Bignoniads ; the Trumpet 

 Flower family. ) A natural order of Di- 

 cotyledonous or Exogenous plants be- 

 longing to the sub-class Corolliflorae of De 

 Candolle, and to the Bignonial Alliance 

 of Lindley, which includes also Scroph- 

 ulariacece, Acanthacece, and Gemeracece. 

 The order contains trees and twining or 

 climbing shrubby plants, with usually 

 opposite compound leaves, and showy, 

 often trumpet-shaped flowers. The calyx 

 is divided or entire, sometimes in the 

 form of a spathe; the corolla is usually 

 irregular, four to five lobed, and with a 

 swollen portion below its mouth; the 

 stamens are five in number, and unequal, 

 one generally, two occasionally, being 

 abortive. The ovary has two cavities, 

 surrounded by an expansion at its base; 

 the ovules are attached to the central 

 part of the ovary. The fruit is a two- 

 valved, often pod-like capsule, divided by 

 a spurious expansion of the placenta; the 



