GLOSSARY. 369 



Disk. (1) A modification of the floral receptacle within the calyx, or within the 

 corolla or stamens ; (2) the expanded base of the style which surmounts the 

 ovary in the Umbelliferae; (3) the central part of a radiate compound flower; 

 (4) round openings in the walls of the vessels, such as occur in the Gdniferae, 

 are sometimes termed disks ; (5) in a bulb, the solid base of the stem, around 

 which the scales are arranged. 



Dissected. Applied to a leaf that is divided into numerous irregular portions. 



Dissepiments. The partitions (septa) of a compound ovary. 



Distichous. Arranged one above the other in two rows. 



Divaricate. Branching off from a stem or axis at an angle of about 90°. 



Dorsal. On the back. 



Drupe. A fruit consisting of three layers, enclosing a single seed, as in the peach. 

 The first layer, the epioarp, is the outer skin ; the middle layer is the pulpy 

 sarcocarp; and the third layer is the hard, stony endocarp. 



Drupaceous. (1) Producing or bearing drupes ; (2) resembling a drupe. 



Ehracteate. Without bracts. 



Ebracteolate. Without bracteoles. 



Echinate. Covered with long, sharp, almost prickly protuberances. 



Eglandular. Destitute of glands. 



Emarginate. Notched ; decidedly indented at the end of the midrib. 



Embryo. The rudimentary plant formed in the ovule. 



Endemic. Having its habitat in a certain I'egion or country ; peculiar to a region or 



country. 

 Endocarp. The inner layer of the ovary ; the stony layer surrounding the seed, as 



in the peach or plum. 

 Endosperm. The albumen or nutritive matter in which the embryo is often imbedded 



m the seed. The term is usually restricted to the albumen formed within the 



embryo-sac, as in the majority of seeds ; when formed outside the sac it is 



termed perisperm. 

 Ensiform. Sword-shaped. 



Entire. Consisting of a single piece, with the margin nowhere indented. 

 Epicalyx. An external involucel or accessory calyx outside of the true calyx. 

 Epicarp. The outer skin or rind of a fruit. 

 Epiderm,is. The outer skin. 

 Epigynous. Inserted on the ovary. 

 Epipetalous. Inserted on the petals. 



Epiphytic. Growing on other plants by way of support, but not parasitic. 

 Erecto-patent, or erect-patent. Erect, or nearly so, and at the same time spreading. 

 Erase. Irregularly toothed, as if gnawed. 

 Erosulate. Slightly erose. 

 Exarillate. Without an arillus. 

 Exotic. Brought from abroad ; foreign. 



Exserted. Protruding beyond, as stamens beyond the perianth. 

 Exstipulate. Destitute of stipules. 

 Extrorse. Directed outwards. 

 Extruded. Thrust out. 



Falcate. Curved like the blade ef a scythe. 



Farinose. Covered with very short, intricate, white hairs, and having the appearance 



of meal or dust. 

 Fascicle. A bundle or cluster. 

 Fastigiate. Having the branchlets of almost equal height; tapering to an apex, 



like a pyramid. 



