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GLOSSARY. 



Hirsute, covered with long stiff hairs. 

 Hispid, covered with long very harsh hairs. 

 HiSTOGENETic, applied to minute molecules, 



supposed to be concerned in the formation of 



cells. 

 Histology, the study of microscopic tissues. 

 HoLOSERicEOUS, Covered with minute silky 



hairs, discovered better by the touch than by 



■ sight. 

 HoMODROMous, Spirals running in the same 



direction. 

 HoMOGAMOUS, Composite plants having the 



flowers of the capitula all hermaphrodite. 

 Homogeneous, having a uniform structure or 



substance. 

 HoMOMORPHic, when the pistil is fertilised by 



the pollen from its own flowers ; this is self- 

 fertilisation. 

 Homos and Homoios, similar, in composition 



Homo. 

 HoMOTROPAL, when the slightly curved em- 

 bryo has the same general direction as the 



seed. 

 HoROLOGiCAL, flowers opening and closing at 



certain hours. 

 HuMiFUSE, spreading along the ground. 

 Hyaline, transparent or colourless ; applied by 



Barry to the part where the cell-nucleus 



appears. 

 Hybrid, a plant resulting from the fecundation 



of one species by another, 

 Hymeniljm, the part which bears the fructifica- 

 tion in Agarics. 

 Hypanthodium, the receptacle of Dorstenia, 



bearing many flowers. 

 Hypha, the filamentous tissue in the thallus 



of lichens. 

 Hvphasma, a web-like thallus of Agarics. 

 Hypo, under or below, in composition Hyp. 

 Hypocarpogean, plants producing their fruit 



below ground. 

 Hypochilium, the lower part of the labellum 



of Orchids. 

 HypocRATEBiFORM, shaped like a salver, as 



the corolla of Primula. 

 Hypogeal or Hypogeous, under the surface 



of the soil, applied to cotyledons. 

 Hypogynous, inserted below the ovary or 



pistil. 

 Hypothallus, the mycelium of certain Ento- 



phytic Fungi, as Uredines, 

 Hypsometrical, measurement of altitude. 

 Hysteranthous, when leaves expand after 



the flowers have opened- 

 Hysterophyta, a name applied to Fungi. 



Icosandria, having twenty stamens or more 

 inserted on the calyx ; Icosa?idrous, having 

 twenty stamens. 



Icosi, twenty; in composition Teas. Same as 

 Latin Viginti. 



Imbricate or Imbricated, parts overlying 

 each other like tiles on a house. Imbricated 

 £Bstivation, the parts of the flower-bud alter- 

 nately overlapping each other, and arranged 

 in a spiral manner. 



Impari-pinnate, unequally-pinnate, pinnate 

 leaf ending in an odd leaflet. 



Inarching, a mode of grafting by bending two 

 growing plants towards each other, and caus- 

 ing a branch of the^ one to unite to the 

 other. 



Inarticulate, without joints or interruption 

 to Continuity. 



Inch, French, is equal to 1,06578 inch 

 British. 



Incised, cut down deeply. 



Included, applied to the stamens when enclosed 

 within the corolla, and not pushed out beyond 

 its tube. 



Incumbent, cotyledons with the radicle on 

 their back. 



Indefinite, applied to inflorescence with centri- 

 petal expansion ; also to stamens above 

 twenty, and to ovules and seeds when very 

 numerous. 



Indehiscent, not opening; having no regular 

 line of suture. 



Indeterminate, applied to indefinite inflores- 

 cence. 



Indigenous, an aboriginal native in a country. 



Induplicate or Induplicative, edgesiof the 

 sepals or petals turned slightly inwards in 

 Eestivation. 



Indusium, epidermal covering of the fructifica- 

 tion in some Ferns. 



Indutive, applied by Miers to seeds having the 

 usual integumentary covering. 



Inermis, unarmed, without prickles or thorns. 



Inferior, applied to the ovary when it is 

 situated below the calyx ; and to the part of 

 a flower farthest from the axis. 



Inflokescence, the mode in which the flowers 

 are arranged on the axis. 



Infundibuliform, in shape like a funnel; as 

 seen in some gamopetalous corollas. 



Innate, applied to anthers when attached to 

 the top of the filament. 



Innovations, buds in Mosses. 



Intercellular Space, same as Lacuna. 



Interfoliar, between two opposite leaves. 



Internode, the portion of the stem between 

 two nodes or leaf-buds. 



Intekpetiolar, between the petioles of op- 

 posite leaves ; as the stipules of Cinchona. 



Interruptedly-pinnate, a pinnate leaf in 

 which pairs of small pinnae occur between the 

 larger pairs. 



Interstaminal, an organ placed between two 

 stamens. 



Intextine, one of the inner coverings of the 

 pollen-grain. 



Intine, the inner covering of the pollen-grain. 



Introrse, applied to anthers which open on the 

 side next the pistil. 



Inverted, applied to the embryo when the 

 radicle points to the end of the seed opposite 

 the hllum. 



Involucel, bracts surrounding the partial 

 umbel of Umbel liferse. 



Involucre, bracts surrounding the general 

 umbel in Umbelliferse, the heads of flowers in 

 Compositae, and in general any verticillate 

 bracts surrounding numerous flowers. It is 

 also used in the same sense as th^ Indusium 

 of Ferns. 



Involute or Involutive, edges of leaves 

 rolled inwards .spirally on each side, in esti- 

 vation. 



Irregular, a flower in which the parts of any 

 of the verticils differ in size, 



Isochezmal or Isocheimonal, lines passing 

 through places which have the ^same mean 

 winter temperature. 



