538 GLOSSAHY OF BOTANICAL TERMS 



Filament. — The stamen-stalk bearing the anther. It is not an essential 

 part of the flower. 



Floret. — Diminutive of flower. Applied to the small flowers of com- 

 posites. 



Glabrous. — Smooth, without hairs or bristles. 



Inflorescence. — Flowering ; having reference to method, and where there 

 are several flowers, their relation to each other and the stem. 



Involucel. — When an umbel of flowers is compound, the bracts underneath 

 the secondary umbels are called involucels. 



Involucre. — Leaves, sometimes petal -like, as in flowering dogwood, sur- 

 rounding a single flower or a group of small flowers. Generally 

 bract-like and green, as in the parsley family. 



Keel. — Applied to the two united petals in the front part of such flowers 

 as those of the pea and bean. 



Labellum or lip. — The name of the large petal of orchids. 



Leaflet. — When a leaf is cut down to the mid-rib it is a compound leaf, and 

 each division is a leaflet. Such a compound leaf is that of the com- 

 mon locust. 



Legume. — The fruit of the pea and bean family, usually opening along 

 both sides. 



Lip. — The upper petal of orchids. Also applied to each division of 2- 

 divided flowers, as mints or figworts. 



Lyrate. — Lyre -shaped. Leaves cut, with a large central, terminal lobe, 

 and smaller ones along the side, as in some mustards. 



Mid-rib. — The central, large vein of a leaf. 



Ovate. — Egg-shaped. Broader above, tapering below. 



Palmate. — Leaves spreading from the tip of a common stalk. 



Panicle. — A compound flower-cluster, irregularly brandling. Grasses and 

 lilies-of-the-valley are examples. 



Papilionaceous (corolla). — Tiie peculiarly shaped flowers of the pulse fam- 

 ily, having standard, wings, and keel. 



Pappus. — The calyx of composites ; the down of thistles and dandelions. 



Pedicel. — The stalk of each flower of a cluster of flowers. 



Peduncle. — The naked stalk of a flower. When flowers are clustered, 

 their common stalk is the common peduncle. 



Perianth. — The floral envelopes (sepals and petals), taken collectively. 



