416 



GLOSSARY OF BOTANICAL TERMS. 



T7YANOPHYL1,.— The bluish-green pig- 

 ment in chlorophyll. 



Karyokinesis. — A term descriptive of the 

 changes which the nucleus undergoes 

 during the process of cell division. 



T ABELLUM.— A lip, or modified petal, 

 such as that of Cypripedium and other 

 Orchids. 



Labiate. — Lipped. The same as bilabiate. 



Labium. — A lip. The lower lip of a bi- 

 labiate corolla; or the most conspicuous 

 petal of the flowers of Orchids. 



Lacerate. — Irregularly cleft, as if torn. 



Laciniate. — Cut irregularly into narrow 

 lobes. Applied to the margins of leaves, 

 petals, etc. 



Lacunae. — A term specially applied to air- 

 spaces when about the size of the sur- 

 rounding cells. 



Lacunose — Having pits or depressions. 



Lacustrine. — Belonging to or living in 

 ponds or lakes. 



Lagsniform. — Shaped like a Florence flask. 



Lamella. — A little plate. The term middle 

 lamella is applied to the middle portion of 

 the common cell-wall of two adjacent cells. 



Lamellar. — Composed of lamella? or thin 

 plates. 



Lamina. — The blade or expanded portion 

 of a leaf or petal. 



Lanate. — The same as Lanuginous. 



Lanceolate — Shaped like a lance. 



Lanuginous. — Covered with soft, wooly 

 hairs. 



Latex.— Milk. The milk-juice of plants. 



Laticiferous. — Milk-bearing. Applied to 

 the milk-tissues of plants. 



Legume. — A monocarpellary pod, like that 

 of the Pea or Bean, that dehisces along 

 both the ventral and dorsal sutures. 



Legumin. — A proteid compound in the 

 seeds of many plants belonging to the 

 natural order of Leguminosa?. 



Lenticels. — Small oval dots which appear 

 upon thebranches of cork-forming Dicoty- 

 ledons during the first year's growth, and 

 which, by further growth during the early 

 part of the second year, rupture the epi- 

 dermis. 



Lenticular. — Shaped like a double-convex 

 lens. 



Lepidate. — Scurfy or covered with small 

 scales. 



Lei'tosporangiate. — Having sporangia 

 formed from a single cell. 



Leucanthus. — White-flowered. 



Leucoplastids. — Starch-forming, color- 

 less, proteid bodies found in cells not ex- 

 posed to light; amyloplasts. 



Liber.— The inner layer of the bark in Gym- 

 nosperms and Dicotyledons. 



Libriform-cells. — Those cells of the wood 

 which are excessively thick-walled and 

 resemble bast or liber-fibers. 



Liciienin. — A starch-like body found in 

 Cetraria and some other Lichens. 



Ligneous. — Woody, or having a woody 

 texture. 



Lignified. — Converted into lignin or cov- 

 ered with ligneous deposits. 



Lignin. — A modification of cellulose, con- 

 stituting the greater portion of the weight 

 of most dry wood. 



Ligulate. — Strap-shaped, as the corollas 

 of many of the Composite ; also a mem- 

 branous appendage at the summit of the 

 leaf-sheath in many grasses. 



Ligule. — A name applied to the strap- 

 shaped corolla of many of the Composite ; 

 also a membranous appendage at the sum- 

 mit of the Isaf-sheath in many grasses. 



Liliaceous. — Applied to a lily-like flower, 

 or one with a funnel- or bell-shaped, six- 

 leaved perianth. 



Limb. — The spreading portion of a gamo' 

 phyllus calyx or corolla. 



Linear. — Applied in botany to an organ 

 that is narrow, many times longer than 

 broad, and has parallel margins. 



Lingulate. — Tongue-shaped. 



Lithocysts. — Crystal-cells. 



Litoral. — Belonging to or inhabiting the 

 shore. 



Lobe.— A rounded projection from the mar- 

 gin of a leaf or other flattened organ. 



Lobate on Lobed. — Possessing lobes. 



Locui.icidal. — Applied to the dehiscence 

 of a capsule when it splits open longitudi- 

 nally along the middle of the back of the 

 cell. 



Loculus. — One of the cells of a pistil or 

 fruit, which contains ovules or seeds. 



Loment. — A modified legume that breaks 

 up transversely, when ripe, into joints. 



Lomentaceous. — Bearing loments. 



Lorate. — Long strap-shaped. 



Lucid. — Shining. 



Lunate. — Crescent-shaped, or shaped like 

 a half-moon. 



Lutescent. — Yellowish, or becoming yel- 

 low. 



