48 BULLETIN 797, U. S. DEPARTMENT OF AGRICULTURE. 
Broken tulips. — Tulips in which the coloring matter is unequally distributed in 
both flowers and foliage. 
Bulb. — A fleshy underground bud with thick succulent scales. It is an entire 
plant condensed Into a gigantic bud. 
Bulb house. — The storehouse in which bulbs are kept and handled between 
the time of digging and planting. 
Bybloemen. — Tulips of various shades of purple to violet in the breeder and 
broken sections. The ground color of the petal (the color of the tissue be- 
tween the epidermal layers) is white. 
Centimeter. — One l/100th of a meter, or about two-fifths of an inch. 
Cleaning 1 . — Separation of bulbs from the clumps in which they grew and the 
removal of dirt and chaff from them. 
Corona. — The crown cup or tube of the narcissus flower. 
Culling. — Removal of undesirable bulbs. 
Curing. — The treatment of bulbs in storage. 
Cutting. — Removing tulip and hyacinth flowers from the beds. 
Daffodils. — The largest section of the genus Narcissus. It includes in common 
parlance all but the rush-leaved forms, or jonquils. 
Darwins. — For the most part a robust May-flowering group of tulips wi+h 
flowers of a rectangular form at the base. 
Double Earlies. — Double-flowered early tulip varieties. 
Dropper. — A stemlike growth frequent in many classes of bulbs. It grows 
downward some distance from the parent bulb and gives rise at its ex- 
tremity to a new deeper set bulb. 
Dutch bulbs. — Tulips, narcissi, and hyacinths, besides a score of other bulbs 
and roots which in the Netherlands are propagated for sale. They are 
often called Holland bulbs. 
Dutch-Roinan. — Hyacinths of the Dutch varieties grown the last year in the 
south of France. 
Dutch prepared. — Dutch hyacinths dug early and subjected to artificial heat 
to hasten the development of the flower spike. 
Fire. — An abl"eviated term for the fire disease of tulips caused by the fungus 
Botrytis parasitica. 
Gray disease. — The mosaic of hyacinths and narcissus. 
Hyacinth. — A low, herbaceous perennial of the lily family, usually with a 
large spike of bell-shaped flowers terminating a short scape and a coated bulb 
with outer coats papery, similar to those of the narcissus or the onion. 
Hyacinth, Roman. — A species distinct from the Dutch hyacinth. It is more 
graceful than the latter and not adapted to out-of-door culture except in 
the South. 
Hyacinth, Dutch. — The common hyacinth. 
Incomparabilis. — A group of narcissi having large chalice-cupped coronas. 
Increase. — The propagated stock of bulbs of any one period. 
Jonquils. — A small group of the genus Narcissus with rushlike leaves. The 
terms narcissus, daffodil, and jonquil are used as common names very loosely 
and with a great deal of confusion. Often people use the name daffodil to 
designate all the single-flowered forms except the rush-leaved ones and the 
Poeticus section. The rush-leaved forms are called jonquils and the bunch- 
flowered and Poeticus groups narcissi. 
Xeedsii. — A group of narcissi like the Incomparabilis and Barrii sections, but 
the flowers are white or only slightly yellowish tinted. 
