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GLOSSARY OF TECHNICAL TERMS. 



Dentate, toothed ; usually applied 

 to sharp teeth not directed for- 

 wards. 



Dichotomous, having the divisions 

 of the stem always branching in 

 pairs. 



Didymous, twin ; found in pairs. 



Digitate, spreading like the fingers. 



Dimidiate, applied to organs split 

 into unequal halves. 



Dimorphic, having two forms. 



Distichous, arranged in two rows on 

 opposite sides of a stem. 



Divaricate, applied to branches 

 which spread very widely. 



Dorsal, relating to or attached to 

 the back. 



Elliptical, shaped like an ellipse ; 

 oval or oblong with regularly 

 rounded ends. 



Emarginate, notched at the apex. 



Entire, applied to margins which 

 are not cut into in any way. 



Epiphyte, a plant which grows upon 

 another without taking any nutri- 

 ment from it. 



Equilateral, equal-sided. 



Erect, standing straight up ; often 

 applied to leaves which are per- 

 pendicular to the surface of 

 attachment. 



Exserted, protruding beyond or out 

 of. 



Falcate, bent, or shaped like a 

 sickle. 



Fid, cleft or lobed. 



Filiform, thread-like. 



Fimbriate, fringed. 



Flahellate, expanded like a fan. 



Flaccid, limp, soft and weak. 



Flexuous, curved in a zigzag man- 

 ner. 



Foliaceous, having the form or 

 texture of a leaf. 



Glabrous, quite destitute of hairs. 



Glandular, applied to hairs which 

 have glands on their tips. 



Glaucous, covered with a pale 

 bloom. 



Globose, round like a ball. 



Gonous, angled, as 3-gonous. 



Heterosporous, applied to Crypto- 

 gamic plants having more than 

 one kind of spore, as in Isoetes. 



Hirsute, covered with stiff or coarse 

 hairs. 



Hispid, covered with rigid or bristly 

 hairs. 



Hispidulous, minutely hispid. 



Imbricate, overlapping, like tiles on 

 a house. 



Incised, cut sharply and irregu- 

 larly. 



Indusium, the covering of the sorus 

 of a fern, called here an invo- 

 lucre. 



Involucre, the membrane covering 

 the sorus. 



Involute, rolled inwards ; applied 

 to the margins of leaves when 

 rolled in towards the middle. 



Isosporous, applied to Cryptogamic 

 plants which produce only one 

 kind of spore, as ferns. 



Lacerate, apply to margins which 

 appear irregularly torn. 



Laciniate, cut into very narrow 

 strips or segments. 



Lamina, the blade or expanded 

 portion of a leaf. 



Lanceolate, having the form of a 

 lance-head ; narrower than ob- 

 long, and tapering to each end. 



Lateral, belonging to or borne on 

 the sides. 



Ligulate, shaped like a strap. 



Linear, narrow or line-like ; applied 

 to very narrow leaves many times 

 longer than broad. 



Lobe, applied to the divisions of 

 leaves or other organs. 



Locular, divided into cells or loculi. 



Loculicidal, the mode of opening of 

 a capsule when the walls of the 

 loculi fall out, carrying the septa 

 with them. 



Lunate, half-moon shaped. 



Lyrate, applied to pinnatifid leaves 

 with a large terminal and smaller 

 lateral lobes. 



Macrospores, the larger kind of 

 spores in Lycopodiacese. 



Macrosporangia, the vessel or cap- 

 sule containing the macrospores. 



Membranous or Membranaceous, 

 thin and rather soft or pliable in 

 consistence. 



Microspores, the smaller spores of 

 Lycopodiacese, hence Microspo- 

 rangia. 



Mucronate, ending in a sharp, short 

 spine. 



