202 GLOSSARY 



Involucre — A whorl of bracts beneath a flower or an inflorescence. 

 Irregular (of a flower) — Where the petals are not all alike. 



Labellum (in Orchidese) — One of the petals which is usually much 



larger than the others. 

 Latex — A milky juice formed in special receptacles {Papaver^ Son- 



chus^ Euphorbia). 

 Legume — A dehiscent seed-vessel splitting down both back and 



front {LeguminoscE). 

 Ligule (in grasses) — A small appendage to the leaf at the poin 



where it springs from the stem. 

 Loculus — A division or chamber of the ovary. 



Male (of flowers) — Having stamens but no pistil. 



Mericarp — Each half of a cremocarp ( Umbellifera). 



Mo7iadelphous (of stamens) — The filaments all more or less cohe- 

 rent {LeguniiiioscB). 



Mo7ioecious — Having male and female flowers on the same indivi- 

 dual {Hazel). 



Mucronate (of leaves) — When the mid-rib projects beyond the leaf 

 like a tooth. 



Nectary — Any organ that secretes nectar. 



Node (of stems) — The zone from which one or more leaves spring. 



Nutlet — A small dry indehiscent fruit {Borraginece). 



Ochrea — A stipule-like structure forming a sheath round the stem 



{Polygonacece). 

 Ovary — The lower part of the pistil containing the ovules. 

 Ovule — A rudimentary seed. 



Pale (in grasses) — An inner bract, from the axil of which springs a 



flower. 

 Panicle — A branched raceme {Gra?ninecB). 

 Pappus — The crest of silky hairs into which the calyx is sometimes 



transformed {Cojnpositce). 

 Parasite — A plant which obtains its sustenance from the living 



tissues of another plant {Dodder., Mistletoe). 



