BOTANIC MATERIA MEDICA, 413 
Bough—bow (A. S. dog, bugan, to bend). The 
arm or main branch of a tree. 
Bourgeon—ber’-jon (Fr. bourgeon, pronounced 
boor-jon, a young sprout or bud of a vine), 
The first shoot or bud of a plant. 
Bracheate—bra’-ka-at (Lat. brachium, the 
arm). A plant or shrub having opposite 
branches at right angles to each other. 
Bracts—brakts (Lat. bractea, a thin leaf of 
metal). In botany, modified or imperfect 
leaves at the foot of a flower or stalk. 
Bryology—tri-ol’-o-ji (Gr. druon, moss, and 
logos, discourse). A treatise, discourse or 
study of mosses. 
Bud—bud (Bohemian, dodka, a point; bodek, a 
thorn). The shoot or sprout of a plant, 
flower, leaf; the unexpanded flower or leaf. 
Bulb—bulb (Lat. dudbus; Gr. bolbos, a globular 
root). A root made up of layers or scales, 
_ Example: the onion. , 
Bulbiferous—bul-bif’-er-us, Bulbous, bulblet. 
Terms applied to bulbs, 
Byssus—bis’-sus (Lat.; Gr. .dussos, fine flax). 
In botany, the delicate tufts of mould of fun- 
gus growth springing from damp walls or 
decayed vegetable matter. 
Byssaceous—bis-sa’-shus. A term used to in- 
dicate the delicate cotton or wool-like fila- 
ments of plants. 
Byssoid—bis’-soyd (Gr. dussos, and ezdos, form). 
A term used to indicate delicacy in structure; 
cobweb-like. 
Caballine—kab’-al-lin (Lat. caballus, a pack or 
inferior riding horse; Gr. £adalles, to a horse), 
an inferior Cape Aloes, horse aloes. 
