43 



Keel. A central ridge; also the united an- 

 terior petals of a papilionaceous flower. 



Key. A dry winged indehiscent fruit; a 

 samara. 



Laciniate. Cut into long irregular teeth. 



Lamella, (pi. Lamellae) A thin flat scalo 

 or plate. 



Lamellate. Composed of lamellae. 



Laminate. Consisting of plates. 



Lanceolate. Lance-shaped, wide below and 

 tapering to apex, but narrower than 

 ovate. 



Leaflet. One of the small blades of a com- 

 pound leaf. 



Legume. A simple dry fruit, composed of a 

 single carpel and dehiscent usually along 

 both sutures; a pod., as of the Pea. 



Leguminous. Producing legumes. 



Lenticel. Small lens-shaped corky growths 

 seen in young barks. 



Lenticular. Lens-shaped. 



Lepidote. Bearing small scurfy scales. 



Ligulate. Strap-shaped, or provided with 

 ligules, descriptive of corollas, etc. 



Limb. The expanded part of a petal or 

 sepal. 



Linear. Descriptive of a narrow leaf with 

 margins approximately parallel, as a 

 blade of grass. 



Lobed. Divided with rather deep sinuses. 

 Loculicidal. Said of capsules which open 



into the sell along the dorsal suture. 

 Loment. A pod constricted between tho 



seeds. 

 Lyrate. Lyre-shaped; said of pinnatifid 



leaves where the terminal segment is 



largest. 



Marcescent. Withering but still persisting. 

 Medulla. The central pith-column of exo- 

 genous stems. 

 Medullary-rays. Lines of specialized cells 



of woods radiating from the pith-column 



to the bark. 

 Micropyle. The orifice of an ovule or the 



corresponding point of a seed. 

 Midrib. The main central rib of a leaf; the 



mid-vein. 

 Monadelphous. Stamens with filaments 



united. 



Moniliform. Resembling a string of beads. 

 Monocotyledonous. With a single cotyledon. 

 Monoecious. With stamens and pistils on 



the same plant but in different flowers. 

 Monopetalous. With petals united. 

 Mucro. A small abrupt tip. 

 Mucronate. Furnished with a mucro. 

 Muricate. Rough with short rigid points. 



