182 



GLOSSARY. 



Innovations, in Gramineae, barren 



shoots. 



Ins< rti (I. attached to or growing upon. 



Intemode, the portion of the stem 

 between two nodes. 



Interrupted, not continuous and reg- 

 ular. 



Introrse, turned inward. 



Involucel, a secondary involucre, as 

 that of an umbellet; a circle of 

 bractlets. 



Involucre, a circle of bracts subtend- 

 ing a flower cluster; involucrate, 

 provided with an involucre. 



Involute, rolled inwards from both 

 sides. 



Irregular, the parts not of the same 

 size and shape. 



Keel, a longitudinal central ridge on 

 the back of an organ, like the keel 

 of a boat ; the two lower petals of a 

 pea-like flower which are joined into 

 a keel-like body. 



Lacerate, irregularly but not neces- 

 sarily deeply cleft or torn. 



Laciniate, cut or slashed into narrow 

 divisions. 



Lamellate, composed of thin plates. 



Lanate, densely woolly. 



Lax, loose. 



Leaflet, one of the divisions of a com- 

 pound leaf. 



Legume, a 1-celled seed vessel, com- 

 posed of a single carpel, which 

 dehisces by both the ventral and 

 the dorsal sutures into two valves. 



Lenticular, shaped like a lens. 



Ligneous, hard and woody. 



Ligule, strap-shaped body such as the 

 ray in the Sunflower Family; in 

 Cramineae the exsertcd portion of 

 the hyaline membrane lining the 

 sheath. 



Limb, a border, the blade of a petal or 

 the spreading pari of a sympeta- 

 lous corolla. 

 I.nu , ' , . of an inch. 

 Linear, very narrow, with parallel 



sidrs; I 01 5 01 more times as 



long. 

 Lip, one of the two divisions of a bila- 

 biate corolla or calyx. (See Bila- 

 biate.) 



Littoral, growing near or under the 

 influence of the sea. 



Lobe, a division of an organ, espe- 

 cially one which is rounded; leaf 

 lobes are usually not deep ; leaves 

 may be lobed, parted or divided de- 

 pending upon the depth of division. 

 (See Parted and Divided.) 



Loculicidal, a capsule splitting longi- 

 tudinally into the backs of the 

 cells. 



Lodicules, in Gramineae, minute hya- 

 line scale-like organs at the base 

 of the stamens, whose function is 

 the opening of the floral envelope 

 at anthesis. 



Lunate, crescent-shaped. 



Lyrate, shaped like a lyre, the ter- 

 minal lobe of the leaf large and 

 rounded with the lower pairs 

 smaller. 



Mammae form, breast-shaped or bear- 

 ing breast-shaped prominences. 



Marcescent, withering but persistent, 

 not falling off. 



Maritime, growing on the sea-coast. 



Membranous, or membranaceous, thin, 

 soft, and more or less pliable like an 

 animal membrane. 



Merous, parts or members; used in 

 compounds, as 5-merous, having 5 

 parts. 



Mesophyte, a common type of plant 

 growing under the most favorable 

 conditions of soil and moisture, 

 characterized as a whole by a lack 

 of special adaptations and by a 

 great and diverse development of 

 the leaf surface; Maples, Alders, 

 and Mustards are typical meso- 

 phytes. 

 Monadelphoue, stamens united into 

 one set. 



MonUiform, like a necklace or string 



of beads. 



MonoedoUS, with stamens and pistils 

 in separate flowers on the same 

 plant. 



Montane, of or growing in the moun- 

 tains. 



Mueronate, tipped with a mucro or 

 sharp but rather soft point; mucro- 

 ,nil(it< . the diminutive. 



