INDEX SECOND. 



B. 



Banyan tree, a remarkable one, 198. 



Barclay, Dr. his opinion respecting the cells of honeycomb, 373, 

 Bark, structure of the, 317. 



reproduction of the, 848. 



Barley indicates a poor soil, when it has long roots, 224. 



Bauer, Mr. Francis, his opinion of the cuticle, 600. 



Bauhin, Casper, first described the potatoe, 27. 



Beauvois, M. de, his opinion respecting the medullary tube, 867. 



Biennial herbaceous roots, structure of, 343. 



Boerhaave, his definition of a plant, 42. 



Bonnet, his remarks on absorption by leaves, 617. 



Botany, derivation of the term, 2. 



its antiquity, 6. 



its utility to medicine, 19. 



its utility to agriculture, 28. 



its importance as a branch of general education, 29. 



Bradley, Mr. his theory of grafting, 397. 

 Branch, origin of the, 384. 



organization of its germ in the bud, 386. 



is fully formed when protruded from the bud, 388. 



. origin of the adventitious, 391. 



buds, when formed, 395. 



remain latent, 395. 



* progress of its germ, when it is not evolved, 403. 



Branching, its theory illustrated by a diagram, 404. 



. new theory of, 391 405. 



Brunfels, the restorer of the science of Botany in Europe, 10. 



Bryonia alba, structure of its stem, 414. 



its stem contains three kinds of vessels, 419. 



Buds, supposed by Darwin to have a sensorium, 376. 



origin of, 485 395. 



contain the germs of future branches, 386. 



theory of their formation, 391. 



do not proceed from the alburnous vessels, 393. 



branch, when formed, 395. 



are distinct individuals, 395. 



stem, when formed, 395. 



effects of temperature on, 399. 



Bulbs, how to distinguish from tubers, 165. 



-- - are reservoirs of nutriment, ib, 

 . .. are hybernacula, 165. 



are the lateral progeny of the plant, 165. 



are exhausted in producing the stem and leave*, 169. 



are subterraneous buds, 1 87. 



scales of, can produce new bulbs, 170. 



flowering, the last of the natural series, 187. 



their vessels may be injected, 181. 



their spiral vessels are easily detected, 184. 



new leaf, are the lateral progeny of the old bulbs, 185. 



new, sometimes formed within the old, 181. 



cauliriar, structure of, 453. 



erroneously regarded as gems by Linnaeus, 453. 



. produce leaves only, 455. 



Bulliard detected the seeds of fungi, 452. 



