GLOSSARY 421 



Glume. A floral bract of the grasses and sedges. 



Glu'ten. The proteid matter of cereals. 



Gonidium. Applied to the algal cells in lichens as well as to many forms of 



asexual reproductive bodies in flower-less plants 

 Gon'ophore. An upgrowth of the receptacle between the corolla and stamens, 



as in Pas si flora. 



Gynoeci'um. The female sexual system of a flower. 

 Gyn'ophore. An upgrowth of the receptade between gynoecium and andrce- 



cium as in Geum. 

 Gynoste'mium. The united stamens and style. The column of orchids. 



Hab'itat. The original home o f a plant. 



Has'tate. Shaped like the head of a halberd, the basal lobes diverging. 



Head. An indeterminate form of inflorescence, as seen in the Daisy family, in 



which the flowers are in a dense duster on the receptacle. 

 Heliot'ropism. Response to the stimulus of light. 

 Herba'rium; A classified collection of dried plant specimens. 

 Hermaph'rodite. Applied to flowers which contain both sets of essential organs, 



not necessarily functionally active. 

 Hesperid'ium. A large thick-skinned succulent fruit like the orange, lemon or 



grape-fruit. 



Heterocyst. A large cell, occurring in the filaments of Nostoc. 

 Heterophyl'lous. Having more than one kind of foliage-leaves on the same 



plant. 

 Heteros'porous. Producing asexual spores of more than one kind as in Selagi- 



nella and the rusts. 



Hex. A prefix of Greek origin meaning six. 

 Hexag'ynous. Having six carpels or styles. 

 Hexam'erous. Having the parts of the flower in 6's. 

 Hexan'drous. Having six stamens. 



Hibernation. Passing the winter in a dormant state of existence. 

 Hi'lum. The scar of a seed, after the stalk of the ovule has fallen ofi\ Also 



applied to the point of origin or growth of a starch grain. 

 Hip. The fruit of a Rose, consisting of a number of akenes surrounded by a 



ripened concave receptacle. 



Hirsute. Covered with numerous long coarse hairs. 

 His'pid. Beset with erect stiff hairs, as Borage. 

 Histol'ogy. The study of tissues with the aid of the microscope. 

 Homol'ogous. Having the same structural nature. 

 Homos'porous. Producing asexual spores of only one kind. 

 Hy'brid. A cross between two varieties or species, rarely between two genera 



of the same family. 

 Hydroph'ilous. Applied to flowers that are pollinated through the agency of 



water currents. 



