GLOSSARY. 781 



Cleft. Applied to the division in a leaf or leaf-like organ, which extends 



about halfway to the midvein ; the sinus between the lobes being very 



narrow or acute. 



Coalescence. Same as Cohesion. 

 Coenocytic. Like a syphon. Applied to plants in which their filaments or 



cells are not divided by transverse walls (pp. 24 and 45). 

 Cohesion. The union of parts or organs of the same kind (p. 390). 

 Collateral. A fibrovascular bundle or mestome strand in which the 



leptome is developed on the outer face of the xylem or hadrome 



(p. 341). 



Coma. The tuft of hairs at the summit of some seeds, as Apocynum. 

 Commissure. The separating wall of two carpels. 

 Complete. Applied to a flower that possesses calyx, corolla, stamens and 



pistils (p. 298). 

 Concentric. Applied to a fibrovascular bundle in which the leptome forms 



a continuous ring around the xylem or hadrome ; or vice-versa, the 



phloem may be surrounded by the hadrome, as in monocotyledonous 



stems (p. 342). 

 Conduplicate. Folded together lengthwise. Applied to leaves which are 



so folded in the bud that the opposite halves of the lamina touch each 

 other (p. 364). 

 Confluent (Connate or Coherent). Applied to anther-lobes which are 



united at the summit of the filament and diverge from the point of 



attachment as in some of the Labiatae (p. 381). 



Conjugation. The method of reproduction by the fusion of the cell con- 

 tents of two similar cells or gametes (p. 20). 

 Connate. United ; congenital. Applied to leaves which are united at 



their bases from their origin. Also applied to the union of anthers 



which are usually spoken of as being confluent (p. 356). 

 Connective. That portion of the filament which serves to connect the 



anthers (p. 381). 

 Connivent. Applied to anthers which are in close juxtaposition to each 



other, but not united (p. 712) as those of the violet. 

 Convolute. Applied to buds in which the leaves are rolled around each 



other lengthwise, so that in transverse section they appear as forming 



a coil, as in the leaf-buds of the cherry (p. 364). 

 Cordate. Inverted heart-shaped, with the summit sharp. 

 Coriaceous. Of a leathery texture, as applied to leaves and the pericarp 



of fruits. 

 Corm. A tuberous subterranean stem surrounded by scaly leaves, as in 



Crocus (p. 329). 

 Corolla. The inner circle or spiral when the perianth consists of two 



distinct whorls (p. 382). 

 Corona. A crown-like appendage at the summit of an organ. Applied 



to the pappus, corolla and stamens. 

 Corymb. A convex or flat-topped flower cluster which resembles a 



raceme, excepting that all of the flowers are on the same level, due 



to the lengthening of the lower pedicels, as in the high or swamp 



blueberry. 



Crenate. A margin in which the teeth are rounded (p. 356). 

 Crenulate. Diminutive of crenate. 

 Cruciate. Having the form of a cross as the tetraspores of the red Algae ; 



also applied to any 4-merous flower. 

 Crustaceous. Hard and brittle in texture, as the thallus of certain Lichens 



(p. 73). 



Cryptocrystalline. Indistinctly or imperfectly crystalline. Sometimes ap- 

 plied, but incorrectly, to sphenoidal micro-crystals (p. 187). 



