266 



IXDEX AXD GLOSS ABV 



Involucre. A circle or collection of bracts 



surrounding a flower cluster or head, or a 



single flower. 

 Involute, rtolled inward. 13S. 

 Iodine, in test for starcli, 9 ; preparation, 246. 

 Irregular (flower). Showing inequality in 



the size, form, or union of its similar parts. 



129. 

 Irritability, 240. 



Keel. A central dorsal ridge, like the teel of 

 a boat; the two anterior united petals of a 

 papilionaceous flower. 133. 



Kidney-shaped. Crescentie with the ends 

 broad and rounded ; reniform. 



Labiate. Lipped ; belonging to the Labiat*. 

 13;i. 



Laboratory outfit, 2-11, 2o5. 



Lacerate. Irregularly cleft as if torn. 



Laciniate. Slashed ; cut into narrow pointed 

 lobes. 



Lamella. A thia flat plate or laterally flat- 

 tened ridge. 194. 



Lanceolate. Shaped like a lance head, broad- 

 est above the base and narrowed to the 

 apex. 92. 



Lateral. Belonging to or borne on the side. 



Latex tubes, 220. 



Leaf, "1 ; activities of (Exps.), G6 ; anatomy. 

 266 ; assimilation in (_Exp. 11), G6, 72 ; con- 

 duction in (Exp. 20), 69 ; form and quali- 

 ties, 72 ; heliotropism (Exp. 17), 63 ; labora- 

 tory studies, 66 ; office, 71 ; parts, 73 ; res- 

 piratiun (Exp. 12), 66; sleep movements 

 (Exp. IS), 63; special uses, 70; stability 

 (Exp. 21), 69; structure, 69; tendril, of 

 Cobsa, Si; venation, 70. 



Leaflet. A single division of a compound 

 leaf. 



Leaves, aquatic, 79, 80; arrangement, 89; 

 bladeless, 76 ; climbing, 83 ; compound, 70, 

 S2, 96; disposition in relation to light, 74; 

 division, 96; duration, 89; equal illumina- 

 tion, 81 ; for storage, S3 ; insectivorous, 86 ; 

 h>bing, 96 ; metamorphosed, 70 ; netted 

 veined, 78; palmately veined, 73; parallel 

 veined, 77; pinnately veined, 7S ; shapes, 

 78; shedding of, S9 ; special conformation, 

 S;3 ; special uses, S3; spinelike, S3; terms 

 used in description, 92. 



Legume. The fruit of the Leguminosae. 

 formed of a simple pistil and usually dehis- 

 cent by both sutures. 150. 



Leguminous. Pertaining to a legume or to 

 the Leguminoso?. 



Lepidote. Beset with small scurfy scales. 



Liber, 225. 



Lichens, 16:5, 196. 



Ligulate. Famished with a llgule. 133. 



Ligule. A strap-shaped corolla, as in the 

 ray flowers of Com posit* ; a thin scarious 

 projection from the summit of the sheath 

 in Grasses. 



Limb. The ex[ianded portion of a gamo- 



petalous corolla, above the throat ; the ex 



panded portion of any petal, or of a k-af. 



l;;i. 

 Linear. Long and narrow, with jiurallel 



margins. 

 Lip. Each of the upper and lo^ver division.s 



of a bUabiate corolla or cal\-x ; the peculiar 



upper [letal in (.>rchids. 

 Liverworts, lf4, 19S. 

 Lube. Any seguieiit of an organ, esjiecially 



if rounded. 96. 

 Loculicidal. Dehiscent into the cavity of a 



cell through the dorsal suture. ■ 151. 

 Lament. A legume constricted, and at 



length breaking, between the seeds. 150. 

 Longevity of trees, 63. 

 Lunate. Of the shape of a half mcou or 



crescent. 

 Lycopodium, 167, 209. 

 Lyrate. Pinnatifid with a large and rounded 



terminal l<,)lie, and the lower lobes small. 



Macrosporangium, 208. 



Macrospore, 20S. 



Marcescent. "Withering, but persistent. 



Marchantia, 164, 193. 



Material, illustrative, 242, 252. 



Medullary rays, 224. 



Membranaceous, Membranous. Thin and 



rather soft and more or less translucent. 

 Meniscoid. Concavo-convex. 

 Mericarp.* One of the achenelike carpels of 



UmbeUiferae. 

 Merous. In composition, having parts; as, 



2-merous, having two parts of each kind. 

 Mesophytes. 65. 

 Micropyle. The point upon the seed at 



which "was the orifice of the ovule. 153. 

 Microscopes, comitound, 242, 255; dealers 



in, 241 ; simple, 241. 

 Microspha?ra, 162, 191. 

 Microsporangium, 203. 

 Microspore, 203. 



Midrib. The central or main rib of a leaf. 

 Mildews, powdery, 191. 

 Mistletoe, 41. 

 Monadelphous (stamens). United by their 



filaments into a tube or column. l;>t. 

 Monandrous, 135. 

 Moniliform. Kesembliiig a string of beads ; 



cylindrical with contractions at intervals. 

 Monocotyledonous. Having but one coty- 

 ledon. 

 >[onocoty]edons, 17 ; fibrovascular bundles 



of, 222; floral plan, 110; stem structure, 



47, 223. 

 Mona-cious. With stamens and pistils in 



separate flowers on the same jjlant. 119, 



129. 

 Morphology, 14. 

 Mosses, 202. 

 Movements, 239 ; due to change of turgldlty, 



240; induced, 240; spontjineous, 240. 

 Mucilaginous. Slimy; containing mucilage. 

 M ucro. A short and small, abrupt tip. 



