BOTANICAL TERMS. 129 



BARK. The outer rind of a tree, beyond the wood. The only 



true Bark is that of Exogens. PI. I. A 2. 

 BEAK. The long sharp point or angle of a leaf, or other 



organ. 



Bi. -Twice, bi-pinnate. PL II. 14 6. p. 

 BIEXXIAL Seeds which do not flower till the second year (of 



their growth) and then die. 

 BIFIDUS. Split half-way into two parts. 

 BLADE. The Lamina, or expanded part of a leaf. 

 BRACTS. Bracteae. The leaves placed immediately below the 



Calyx, if different in form from the other leaves ; and if 



not in a ring, (whorl, see Involucre). 

 BRISTLES. Stiff, sharp hairs. 

 BUD. The young folded-up branch or flower. 

 BULB. A leaf- bud of a Monocotyledonous plant, the scales of 



which are fleshy, and which throw out roots, and become 



a plant. 



BULB, SOLID. A Corm ; which see. 

 BULB, TUNICATED. The outer scales are thin and membranous, 



and folded round the stem. PI. I. B. 5. 

 CADUCOUS. Dropping off. 



CALYX. The most external of the Floral whorls : called su- 

 perior, when it is not separable from the Ovary : inferior 



when it is separate from that part. (PI. II. all, inferior). 

 CAMPESTRIS. Growing in open fields or plains. 

 CAPSULE. Any dry seed-vessel opening when ripe. Usually 



the name given to dry seed-vessels, formed of more than 



two Carpels. PI. I. A 4. j. k. 

 CARPEL. One of the rolled-up leaves of which the Pistil is 



composed : whether combined, or distinct. Also applied 



to some fruits. PI. II. 7. cc., m. c. A S. c. 

 COROLLIFLORJE. Name of the III. Sub-class. (See Method 



of Classing Plants.) 



