GLOSSARY 



347 



Irregular (flower), showing in- 

 equality in the size, form, or 

 union of its similar parts. 



Keel, a central dorsal ridge, 

 like the keel of a boat; the 

 two anterior united petals of 

 a papilionaceous flower. 



Labellum, lip ; the peculiar up- 

 per (but by a twist of the 

 pedicel apparently lower) 

 petal of the Orchidacece. 



Labiate, lipped; belonging to 

 the Labiates. 



Lanceolate, shaped like a lance- 

 head, several times longer 

 than wide, broadest above 

 the base and narrowed to the 

 apex. 



Leaflet, a single division of a 

 compound leaf. 



Legume, the fruit of the Legu- 

 minostz, formed of a simple 

 pistil, and usually dehiscent 

 by both sutures. 



Lig^late, furnished with a lig- 

 ule. 



Ligule, a strap-shaped corolla, 

 as in the ray flowers of Com- 

 posites ; a thin often scarious 

 or hairy projection from the 

 summit of the sheath in 

 Grasses, facing the stem. 



Limb, the free portion of a 

 gamopetalous corolla. 



Linear, long and narrow, witli 

 parallel margins. 



Lip, each of the upper and lower 

 divisions of a bilabiate co- 

 rolla, or calyx; the peculiar 

 upper (but by the twist of 

 the pedicel apparently lower) 

 petal in Orchids. 



Lobe, any segment of an organ. 



Lobedj divided into or bearing 

 lobes. 



Locular, in composition, having 



cells. 

 Loculicidal, dehiscent into the 



cavity of a cell through the 



dorsal suture. 

 Lunate, of the shape of a half- 

 ' moon or crescent. 

 Lyrate, pinnatifid with a large 



and rounded terminal lobe, 



and with the lower lobes 



small. 



Macrosporangium, the receptacle 

 in which macrospores are de- 

 veloped ; ovules of Phanero- 

 gamia. 



Membranous, thin, rather soft, 

 and more or less translucent. 



Mericarp, one of the achene-like 

 carpels of Umbelliferce. 



-merous. In composition, hav- 

 ing parts, as 2-merous, hav- 

 ing two parts of each kind. 



Micropyle, the point upon tlie 

 seed at which was the orifice 

 of the ovule. 



Microsporangium, the receptacle 

 in which microspores are de- 

 veloped; pollen-sac in Phane- 

 rogamia. 



Mid-rib, the central or main rib 

 of a leaf 



Monadelphous (stamens), united 

 by their filaments into a tube 

 or column, anthers remaining 

 free. 



Moniliform, resembling a string 

 of beads; cylindrical with con- 

 tractions at intervals. 



Monoclinous, having both sta- 

 men and pistil; hermaphro- 

 dite or bisexual. 



Monocotyledonous, having but 

 one cotyledon. 



Monoecious, with stamens afid 

 pistils in separate flowers on 

 the same plant. 



