GLOSSAEY. 



819 



IsocHOMous, branches springing from the same 

 plant, and always at the same angle. 



Isomeric, applied chemically to substances 

 which, though difFering in qualities, have the 

 same elements in the same proportions. 



IsoMEROus, when the organs of a flower are 

 composd each of an equal number of parts. 



Isos, equal, in composition Iso. 



IsospoRous, cryptogamic plants producing a 

 single kind of spore, as ferns. 



IsoSTEMONOuSi when stamens and floral enve- 

 lopes have the same number of parts or mul- 

 tiples. 



IsoTHERAL, lines passing through places which 

 have the same mean summer temperature. 



Isothermal, lines passing through places which 

 have the same mean annual temperature. 



Joinings, the places where the parts of the stem 



are attached to each other ; the nodes. 

 Joints, spaces between the knots or nodes or 



joinings. 

 JuGA, a name given to the ribs on the fruit of 



Umbelliferas. 

 JuGUM, a pair of leaflets ; jugate^ applied to the 



pairs of leaflets in compound leaves; 



■unijtigate^ one pair ; bijugaie, two pairs ; and 



Keel, same as Carina. 



Kleistogamous, applied to certain grasses in 



which fertilisation is effected in closed flowers. 

 Knotted, when a cylindrical stem isswoUen 



at intervals into knobs. 



Label, the terminal division of the lip of the 



■ flower in Orchids. 



Labellum, lip, one of the divisions of the inner 

 whorl of the flower of Orchids. This part is 

 in reality superior as regards the axis, but 

 becomes inferior by the twisting of the ovary. 



Labiate, lipped, applied to irregular gamo- 

 petalous flowers, with an upper and under 

 portion separated more or less by a hiatus or 



gap- 



Laciniated, irregularly cut into narrow seg- 

 ments. 



Lacinula, the small inflexed point of the petals 

 of Umbelliferae. 



Lactescent, yielding milky juice. 



Lacuna, a large space in the midst of a group 

 of cells. 



L.«vigatus, having a smooth polished appear- 

 ance. 



L..EVIS, even. 



Lamell.*:, gills of an Agaric, also applied to 

 flat divisions of the stigma. • 



Lamina, the blade of the leaf, the broad part 

 of a petal or sepal. 



Lanceolate, narrowly elliptical, tapering to 

 each end. 



Lanuginoqs,. woolly, covered with long flexu- 

 ous interlaced hairs. 



Lateral, arising from the side of the axis, not 

 terminal. 



Latex, granular fluid contained in laticiferous 

 vessels. 



Laticiferous, anastomosing vessels contain- 

 ing latex. 



Latisept.«, Cruciferous plants having a 

 broad replum in their siliciUa, 



Lecotropal, shaped like a horse-shoe, as 



some ovules. 

 Legume, a pod composed of one carpel, open- 

 ing usually by ventral and dorsal suture, as 



in Pea. 

 Lenticel, a small process on the bark of the 



Willow and other plants, whence adventitious 



roots proceed. 

 Lenticular, in the form of a doubly-convex 



lens.' 

 Lepidote, covered with scales or scurf; Lepis, 



a scale. 

 Lianas or Lianes, twining woody plants. 

 Liber, the fibrous inner bark or endophloeum. 

 Lieberkuhn, a metallic mirror attached to the 



objective of a microscope for the purpose of 



throwing down light on opacjue objects. 

 LiGNiNE, woody matter which thickens the 



cell-walls. 

 LiGULATE, strap-shaped florets, as in- Dande- 

 lion. 

 Ligule, a process arising from the petiole of 



grasses where it joins the blade. 

 LiGULiFLOR^, Composite plants having ligu- 



late florets. 

 Limb, the blade of the leaf; the broad part of 



a petal or sepal ; when sepals or petals are 



united, the combined broad parts are de- 

 nominated collectively the Umb. 

 Line, the 12th part of an inch ; Liney French, 



is equal to 0.088815 inch British. 

 Linear, very narrow leaves, in which the 



length exceeds greatly tlje breadth. 

 LiRELLA, sessile linear apothecium of Lichens. 

 Lobe, large division of a leaf' or any other 



organ ; applied often to the divisions of the 



anther. 

 LocULiciDAL, fruit dehiscing through the back 



of the carpels. 

 LocuLus or LocuLAMENT, a cavity in an 



ovary, which is called unilocular when it has 



one cavity, Hlocular with two, and so on. 



The terms are also applied to the anther. 

 LocusTA, a spikelet of grasses formed of one or 



several flowers. 

 LoDicuLE, a scale at the base of the ovary of 



Grasses. 

 LoMENTUM and LoMENTACEOUS, applied to a 



legume or pod with transverse partitions, each 



division containing one seed. 

 Lunate, crescent-shaped. 

 Lyrate, a pinnatifid leaf with a large terminal 



lobe, and smaller ones as we approach the 



petiole. 



Maceopodous, applied to the thickened radicle 



of a monocotyledonous embryo. 

 Macros, large, in composition Macro. 

 Macrosporangia, cells or thecse containing 



macrospores. 

 Macrospores, large spores of Lycopods. 

 Malpighiaceous Hairs, peltate hairs, such as 



are seen in'Malpighiaceas. 

 Manicate, applied to scales surrounding a 



stalk like a frill, and easily removed. 

 Marcesgent, withering, but not falling off 



until the part bearing it is perfected. 

 Marginate, applied to calyx, same as Obsolete. 

 Masked, same as Personate. 

 Math, a term sometimes used for crop ; an 



agricultural term. 



