208 APPENDIX 
Cleistogamous. Flowers that 
are self-fertilized without 
opening. 
Coma. Tuft of hair on a seed. 
Compound leaf. A leaf with 
more than one blade. 
Compound pistil. Pistil formed 
from two or more carpels 
(14). 
Connate. Like organs united as 
leaves. 
Cordate. Shaped like the con- 
ventional heart. 
Coriaceous. Leathery in texture. 
Corm. A bulb-like swelling of 
the base of the stem. 
Corolla. Inner whorl of a double 
perianth (9). 
Corolloid. Like petals in color 
and texture. 
Corona. A whorl of appendages 
between the stamens and co- 
rolla of the milkweeds. 
Corymb. A_ convex or flat- 
topped flower-cluster with the 
marginal flowers opening first, 
its rays not arising from a 
common point on the common 
axis. 
Cotyledon. A leaf at the first 
node of a seedling. 
Crown. See corona. 
Culm. Stem ofa grass or sedge. 
Cuspidate. With a sharp point. 
Cyme. A flower- cluster differ- 
ing from a corymb in that 
the central flowers open first. 
Deciduous. Falling off at or 
before the end of the growing 
season. 
Decumbent. Lying flat with 
only the ends ascending. 
Decurrent. An organ extending 
on another as a leaf on the 
stem. 
Dehiscent. Opening to discharge 
its contents (20). 
Dentate. With teeth along the 
margin. 
Diadelphous. United into two 
groups (18). 
Dichotomous. Forking regular- 
ly into two equal branches. 
Digitate. Palmate or palmately 
lobed with about five leaflets 
or lobes. 
Dicecious. With staminate and 
pistillate flowers on different 
plants (12). 
Disc. The hypanthium. The 
part of the head of a com- 
posite which consists of tubu- 
lar flowers. 
Discoid. Without ray flowers. 
Dissected. Divided into numer- 
ous segments. 
Drupe. A fruit with a fleshy 
exocarp and a bony endocarp, 
as a plum. 
Emarginate. With a notch at 
the apex. 
Embryo. Plant in the seed. 
Endocarp. Inner layer of the 
pericarp (19). 
Endosperm. Stored food sur- 
rounding the embryo in a 
seed. 
Entire. Margins not notched or 
toothed. 
Epigynous. With calyx and 
corolla attached above the 
ovary (16). 
Erose. With irregular edges as 
if gnawed. 
Execarp. Outer layer of the 
wall of the ovary (19). 
Falcate. Curved like a sythe. 
Fertile. Producing seeds or 
spores (pollen). 
Fleccose. With tufts of soft 
woolly hairs. 
Floret. One of the small flow- 
ers in a head. 
Feoliaceous. lLeaf-like in color 
and texture. 
Follicle. A simple dry fruit, 
dehiscent along one _ suture 
only, as that of the milkweed. 
Fugaceous. Soon falling off. 
