GLOSSARY. 347 



Leaf-blade [Lamina) : the thin expanded portion of a leaf. 

 Leaflet ; one of the divisions or parts of a compound leaf. 

 Leaf-scar : the scar on the stem after the leaf has fallen. 

 Leaf-stalk (Petiole) ; stem of the leaf. 

 Legume : a simple ovary or pod which at maturity splits along 



both ventral and dorsal sutures. 

 Legum-inous : having legumes ; like a legume. 



Leniied : an elevated portion or spot on Elder and other stems, con- 

 sisting of a corky mass, which replaces the stomate. 

 Liber : the inner or fibrous bark of exogenous plants. 

 Ligneous, or Lignose : woody. 

 Ligule: the ray or strap-shaped corolla of some flowers of Com- 



positae; the appendage at the summit of the leaf-sheath in 



Grasses. 

 Ligulate : strap or tongue-shaped. 

 LUiaeeous : like a Lily. 



Limb : the blade of a petal, border of a corolla, etc. 

 Linear : narrow and flat. 

 Lip : the principal division, or lobe of a labiate corolla and calyx ; 



the labellum. 

 Lobate : having lobes. 

 Lobvlnte : diminutive of lobate. 

 Loculicidal : splitting down the middle of the back of each cell or 



cavity. 

 Lament : a pod which separates transversely into joints or parts. 

 Lomentaceous : like a loment. 

 Lunate: crescent-shaped. 

 Lyrale : lyre-shaped. 

 Lyrate leaf: a leaf with the terminal lobe large and roundish, and 



the lower lobes small. 



fi (Greek m) : in measurement one thousandth of a millimetre. 



Macro (as a prefix) : large. 



Macrospore : the larger of two kinds of spores, as in some Lycopods. 



Maculate : spotted. 



Medullary : relating to the pith. 



Medullary Mays : the lines or portions of parenchymous tissue 

 regularly interspersed in the wood, and radiating from the 

 pith. 



Membraruuieous, or Membranous : like a membrane ; thin, and more 

 or less translucent. 



Mericarp : one of the closed half-fruits of the Umbelliferse. 



Meristem : generating tissue, or tissue capable of growth by cell- 

 division. 



Meristematie : having or like meristem. 



Meros (in compound words) : parted. 



Mesocai-p : the middle one of three layers of the pericarp. 



Mesophyll : the parenchymous tissue forming the interior of the leaf- 

 blade. 



Mesophlosm : the middle bark. 



