GLOSSARY OF SPECIAL TERMS. 



IOQ9 



Irregular. A flower in which one or 

 more of the organs of the same series 

 are unlike. 

 Labiate. Provided with a lip-like organ; 



belonging to the family Labiatae. 

 Lacuuate. Cut into narrow lobes or 



segments. 

 lanceolate. Considerably longer than 

 broad, tapering upward from the 

 middle or below; lance- shaped. 

 Latex. The milky sap of certain plants. 

 Leaflet. One of the divisions of a com- 

 pound leaf. 

 Legume. A simple dry fruit dehiscent 



along both sutures. 

 Lenticular. Lens-shaped. 

 Ligulate. Provided with or resembling 



a ligule. 

 Ligule. A strap-shaped organ, as the 



rays in Compositae. 

 Limb. The expanded part of a petal, 



sepal, or gamopetalous corolla. 

 Linear. Elongated and narrow with 



sides nearly parallel. 

 Lineolate. With fine or obscure lines. 

 Lobed. Divided to about the middle. 

 Lament. A jointed legume, usually 



constricted between the seeds. 

 Loculicidal. Applied to capsules which 



split longitudinally. 

 Lodicules. Minute hyaline scales sub- 

 tending the flower in grasses. 

 Lunate. Crescent- shaped. 

 Lyrate. Pinnatifid, with the terminal 



lobe or segment considerably larger 



than the others. 

 Macrosporange. Sporange containing 



macrospores. 

 Macrospore. The larger of two kinds of 



spores borne by a plant, usually giving 



rise to a female prothallium. 

 Marcescent. Withering but remaining 



attached. 

 Medullary. Pertaining to the pith or 



medulla. 

 Mericarp. One of the carpels of the 



Umbelliferae. 

 Mesocarp. The middle layer of a 



pericarp. 

 Micropyle. Orifice of the ovule, and 



corresponding point on the seed. 

 Murosporange. Sporange containing 



microspores. 

 Microspore. The smaller of two kinds 



of spores borne by a plant, usually 



giving rise to a male prothallium; 



pollen-grain. 

 Midvein | Midrib). The central vein or 



rib of a leaf or other organ. 

 Monadelphous. Stamens united by their 



filaments. 



Monilt/orm. Like a string of beads. 

 Monoecious : Bearing stamens and pis- 

 tils on the same plant, but in different 

 flowers. 

 Monstrous. Unusual or deformed. 

 Mucronate. With a short sharp abrupt 



tip. 

 Mucronulate. Diminutive of mucronate. 

 Muricate. Roughened with short hard 



processes. 

 Muticous. Pointless, or blunt. 

 Naked. Lacking organs or parts which 

 are normally present in related spe- 

 cies or genera. 



Naturalized. Plants not indigenous to 

 the region, but so firmly established 

 as to have become part of the flora. 



Nectary. A sugar-secreting organ. 



Node. The junction of two internodes 

 of a stem or branch, often hard or 

 swollen, at which a leaf or leaves are 

 usually borne. 



Nodose. Similar to nodes or joints; 

 knotty. 



A r odulose. Diminutive of nodose. 



Nut. An indehiscent one-seeded fruit 

 with a hard or bony pericarp. 



Nutlet. Diminutive of nut. 



Obcordate. Inversely heart-shaped. 



Oblanceolate. Inverse of lanceolate. 



Oblong. Longer than broad, with the 

 sides nearly parallel, or somewhat 

 curving. 



Obovate. Inversely ovate. 



Obovoid. Inversely ovoid. 



Obsolete. Not evident; gone, rudiment- 

 ary, or vestigial. 



Obtuse. Blunt, or rounded. 



Ochreae. The sheathing united stipules 

 of Polygonaceae. 



Ochreolae. The ochreae subtending 

 flowers in the Polygonaceae. 



Ochroleucous. Yellowish white. 



OSsphere. The cell of the archegone 

 which is fertilized by spermatozoids. 



Operculate. With an operculum. 



Operculum. A lid. 



Orbicular. Approximately circular in 

 outline. 



Orthotropoos. Term applied to the 

 straight ovule, having the hilum at 

 one end and the micropyle at the 

 other. 



Ovary. The ovule-bearing part of the 

 pistil. 



Ovate. In outline like a longitudinal 

 section of a hen's egg. 



Ovoid. Shaped like a hen's egg. 



Ovule. The macrosporange of flower- 

 ing plants, becoming the seed on 

 maturing. 



