GLOSSARY V 



host. A plant or animal on which another organism grows or feeds. 

 hypha (plural hypha). The threads of the mycelium of a fungus. 

 hypocotyl. The stem or internode below the seed-leaves. 

 hypogeal. Said of seeds (as garden pea) in which the cotyledons 



remain under ground in germination. See epigeal. 

 imperfect flowers lack either stamens or pistils. 

 incomplete flowers lack one of the parts or series, as the calyx, corolla, 



stamens, or pistil. 

 indeterminate. See centripetal. 



indiisium. The scale or lid covering a sorus, in ferns and allied plants. 

 inflorescence. Properly, the mode of flowering (page i6o), but some- 

 times used in the sense of a flower-cluster. 

 involucre. A set or whorl of leaves or bracts beneath a flower or a 



cluster of flowers ; sometimes looks like an outer or extra calyx. 

 irregular flowers have some members of one or more of the series unlike 



their fellows. 

 key fruit. See samara, 

 labiate. Lipped ; that is, divided into parts, as the lips of a mouth. 



Said usually of corollas that are lobed into two parts. 

 lateral. On the side ; as a flower or leaf borne on the side of a shoot 



rather than at its end. See tertriinal. 

 leaflet. One of the divisions or parts of a compound leaf. 

 legume. Like a follicle, but opening along both edges. In some 



cases, as in peanut, the pod does not actually open. 

 leguminous plants are those that bear legumes or true pods, as peas, 



beans, clovers, alfalfa, vetch, sweet pea, peanut, locusts, red-bud. 

 lenticel. Very small spots or corky elevations on young twigs, marking 



the place of former twig stomates. 

 locule. One cavity or " cell " in a pistil or anther. 

 loculicidal.... Said of capsules when the carpels or compartments open 



between the partitions. 

 mesophyll. The parenchyma in the leaf. 

 micropyle. The place on the seed at which the pollen-tube entered 



when the seed was forming (when impregnation took place). 

 monocotyledon. Having one cotyledon or seed-leaf. 

 monacious. Said of plants that bear the stamens and pistils in different 



flowers on the same plant. 

 vtycelium. The vegetative part of a fungus, composed of threads or 



hyphae. 

 mycorrhiza. A root covered with or bearing a fungus that aids the 



root in securing nourishment from the soil. 

 naked. Said of flowers that lack envelopes (calyx and corolla) . 



