GLOSSARY OF BOTANICAL TERMS USED. xxvii 



HILUM : the scar left on a seed at the former point of attachment. 



HIRSUTE : bearing long tolerably distinct hairs. 



HISPID : with rough or bristly hairs. 



HOMOGAMOUS : bearing only one kind of flower. 



HOMOGENEOUS : all of the same kind. 



HYALINE : thin and transparent. 



HYGROSCOPIC : apt to swell and expand on the application of water, 



and shrink on its removal. 



HYPOCARP : an enlargement of the pedicel below the fruit. 

 HYPOCHILE : the basal portion of the lip in an orchid flower. 

 HYPOCRATERIFORM : salver-shaped. 

 HYPOGYNOUS : free from but inserted below the pistil. 



IMBRICATE : overlapping like the tiles on a roof. 



IMPARIPINNATE : pinnate with an odd terminal member. 



IMPERFECT : where certain parts usually present are not developed, 



e. g. when one sex is absent in a flower. 

 INCUMBENT : resting or leaning upon. 

 INDEFINITE : too many for easy enumeration, of stamens when 



exceeding 15. 



INDUMENTUM : a covering, such as of hairs. 

 INDUPLICATE : with the edges folded inwards. 

 INDURATED : hardened. 

 INFLORESCENCE : the disposition of the flowers on the floral axis ; 



the flower clusters as a whole. 

 INFUNDIBULAR : funnel-shaped. 

 INNOVATION : a new-formed shoot. 

 INTEGUMENT : the covering of an organ or body. 



INTERCALATED I interposed. 



INTERNODE : the portion of an axis between two adjacent nodes. 

 INTERPETIOLAR : between two opposite petioles. 

 INTRAPETIOLAR : within the petiole, or between it and the stem. 

 INTRORSE : directed inwards, usually referring to the opening of 



anthers. 



INVOLUCEL : an inner wrapping. 

 INVOLUCRE : a ring of free or more or less united bracts surrounding 



several, rarely 1, flowers or their supports. 

 INVOLUTE : rolled in from both margins so that the upper side is 



within. 



IRREGULAR : symmetric only on either side of a median plane. 

 ISOMEROUS : having the members of successive series in equal numbers. 



KEEL : a ridge like the keel of a boat. 



