GLOSSARY 



655 



CiLiATE, fringed with hairs. 



CoLEOPTiLE, (in Gramineae) the first 

 leaf above the cotyledon which en- 

 closes the stem tip. 



CoLEORHizA, the sheath which sur- 

 rounds the primary root in the embryo 

 of the grasses. 



Collateral, (of bundles) having the 

 xylem and phloem side by side on the 

 same radius. 



Collenchyma, elongated, parenchym- 

 atous cells with variously thickened 

 walls, commonly at the angles. 



Collet, applied to the imaginary 

 boundary between the aboveground 

 and subterranean portions of a seed- 

 ling axis. 



Commissure, (in Umbelliferae) the ad- 

 herent faces of the two carpels. 



Common bundle, one that is common 

 to both stem and leaf and continuous 

 from one to the other. 



Companion cell, a phloem element 

 associated with a sieve tube and 

 usually derived from a common 

 mother cell. 



Complementary cells, loosely ar- 

 ranged cells which occur in the 

 lenticel. 



Compound, (of leaf) one in which the 

 blade is divided into separate leaflets. 



Conjunctive tissue, non-vascular tissue 

 adjacent to bundles which consists of 

 lignified, usually elongated, cells. 



Connate, united. 



Connective, that portion of the stamen 

 which joins the two cells of the 

 anther. 



CoNNivANT, convergent or coming into 

 contact. 



Convolute, with one part rolled up 

 longitudinally in another, as the 

 petals of cotton. 



Cordate, heart-shaped. 



CoRM, an enlarged, solid fleshy base of 

 a stem, i.e.. Cyclamen or Indian 

 Turnip. 



Corolla, the inner cycle of the peri- 

 anth; the petals considered collec- 

 tively. 



Corpus, the inner core of the growing 

 point of the apex of the shoot. 



Cortex, that portion of an axis between 

 the epidermis and the stele. 



Corymb, a flat-topped flower cluster, 

 arranged as a raceme, in which the 

 flowers develop centripetally. 



Cotyledons, the first leaves of the 

 embryo. 



Crenate, (of leaves) dentate with 

 rounded teeth. 



Culm, the stem of the grasses. 



Cuticle, a non-cellular deposit of cutin 

 on the surfaces of epidermal cells, oc- 

 casionally on the subepidermal ones. 



Cyme, a determinate flower cluster in 

 which the central or terminal flowers 

 bloom first. 



Cystolith, a concretion of calcium car- 

 bonate which occurs on an outgrowth 

 of the cellulose wall, i.e., some epi- 

 dermal cells of Cannabis. 



Cytoplasm, the more or less transparent, 

 viscous, colorless substance which 

 with the nucleus constitutes the pro- 

 toplast of a cell. 



Deciduous, (of leaves) not persistent, 

 falling in season. 



Decompound, several times divided or 

 compounded. 



Decumbent, reclining with an ascend- 

 ing summit. 



Decurrent, (of a leaf) extending down 

 the stem below the node. 



Decussate, (of leaves) an opposite 

 arrangement with the pairs alternat- 

 ing at right angles. 



Dehiscent, opening by means of pores, 

 valves, slits, etc., as in a capsule or an 

 anther. 



Dentate, toothed. 



Dermatogen, the layer or histogen 

 from which the epidermis is derived. 



