GLOSSARY 



Indehiscent. Not opening in a regular manner to discharge the 



contents. 



Indentations. The spaces between the lobes of the leaf. 

 Inferior ovary. An ovary having part of the receptacle united to 



it and the other organs of the flower above it; found in all 



epigynous flowers. 

 Inflated. Bladdery. 



Inflexed. Abruptly bent inward and downward. 

 Inflorescence. A cluster of flowers. 

 Inserted. Attached to or growing out of. 



Internode. The portion of the stem between two nodes or joints. 

 Interrupted. Applied to a spike of flowers in which there is a whorl 



of flowers alternating with a space without flowers. 

 Involucel. A set of small leaves or bracts subtending a part of a 



compound umbel. 

 Involucre. A set of bracts immediately subtending a flower, a cluster 



of flowers, or an umbel. 

 Involute. Rolled inward from both sides. 



Irregular flower. One which can be halved in only one plane, re- 

 sulting in two equal parts; one in which one petal is different 



from all the others. 



Joint, A place where a leaf or branch appears on the stem ; a node. 

 Juice. The liquid contents of the plant tissue. 



Keel. A ridge somewhat like the keel of a boat. The two petals 

 in the flower of the Papilionaceae which are united into a keel- 

 shaped structure. 



Lanceolate. Applied to a leaf which is at least three times longer 



than broad, usually tapering toward each end, and broadest 



half way or less from the base. 

 Lateral. Attached to the side of an organ. 



Leaf. An appendage of the stem, usually more or less expanded. 

 Leaflet. One of the divisions or leaves of a compound leaf. 

 Leaf-sheath. The petiole or base of the leaf which envelopes the 



stem, as in grasses. 

 Lemma. The lower of the two bracts which enclose the flower in 



grasses. 

 Lenticel. Corky spots or lines on the bark, especially on the younger 



branches. 



Ligule. A thin projection from the top of the leaf-sheath in grasses. 

 Linear. Usually at least ten times longer than broad, narrow, with 



the sides more or less parallel. 



Linear-lanceolate. Intermediate between linear and lanceolate. 

 Lip. One of the two large lobes in an irregular, tubular flower; 



in the orchids, the one modified petal. 



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