128 GLOSSARY 



Decompound. More than once compounded or divided. 



Dentate. Tooth-margined. 



Diadelphous. Said of the stamens when they are arranged in two sets. 



Didynamous. Said of the stamens when they are arranged in two pairs of un- 

 equal length. 



Dioecious. Said of plants having staminate and pistillate flowers on different in- 

 dividuals. 



Discoid. Disk-like. 



Disk. A structure appearing in certain flowers, as in Umbelliferae. It is a 

 cushion-like outgrowth of the receptacle around the base of the pistil. 



Divergent. Spreading abruptly apart. 



Drupe. A fleshy fruit with a central stone or pit, as a peach. 



Endocarp. The inner layer of the ovary wall. 



Ephemeral petals. Those which last for only one day. 



Epicarp. The outer layer of the ovary wall. 



Epigynous. Said of flowers whose perianth arises above the ovary. 



Exfoliate. To peel off in thin layers. 



Filament of stamen. The part which supports the anther. 



Filiform. Thread-form. 



Flaccid. Without rigidity, wilted. 



Flocculent. Fearing soft wool-like hair in small masses. 



-foliolate. Referring to the leaflets, as trifoliolate. 



Fugacious. Said of petals or sepals which fall or fade very early. 



Glabrate. Somewhat glabrous, or becoming so. 



Glabrous. Smooth. Free from hairs. 



Glaucous. Having a bloom. 



Glutinous. Sticky, like the gluten of wheat. 



Granulate. Bearing minute grains. 



Halberd-form. Like an arrow-head in form, but the basal lobes turned out nearly 



at right angles. 

 Hirsute. Stiff-hairy. 



Hispid. Bearing rigid or bristly hairs. 



Hybrid. A form resulting from the crossing of different species. 

 Hydrophyte. An aquatic plant or one growing in very wet places. 

 Hypogynous. Said of flowers whose perianth arises beneath the ovary. 



Imbricated. Overlapping, as frequently the sepals or petals in buds. 



Imperfect flowers. Flowers which lack one or the other of the essential parts; 



they are either staminate or pistillate. 



Incised. Having the margin as if cut sharply and irregularly. 

 Included stamens. Those which do not protrude at all from the corolla tube. 

 Indehiscent. Not opening at maturity, as many kinds of fruits. 

 Inferior ovary. Equivalent to epigyny. 



Internodes. The spaces between the nodes or joints of the stem. 

 Involucel. A secondary involucre. 

 Involucre. A whorl of bracts surrounding an inflorescence or a single flower. 



Characteristic of Compositae. 



Keel. Applied to the two united petals of many flowers of Leguminosae which 

 simulate the form of the keel of a boat, as in sweet-pea or clover. 



