HENDERSON'S HANDBOOK OF PLANTS. 



EXC 



Excurrent. Projecting or running beyond 

 the edge of anything; running out. When 

 a stem remains always central, all the 

 other parts being regularly disposed 

 round it, as in the stem of a Fir Tree. 



E.rigttus. Small, slender, minute. 



Exindusiate. Without an indusium. 



K.rinfine.The middle coat of a pollen 

 grain; or, if three or four coatings are 

 present, then that next the intine, which 

 see. 



Exogens. A name given to one of the great 

 classes of the vegetable kingdom, corre- 

 sponding with the Dicotyledons. The 

 name Exogen is from the Greek, and 

 signifies out, ward and to grow, meaning 

 growing outwardly, and has reference to 

 the manner in which the woody circles 

 are produced, viz. , from the center out- 

 wardly toward the circumference. The 

 age of an exogenous tree, especially in 

 temperate climates, may be determined 

 by counting the number of zones or cir- 

 cles in the woody stem, each circle mark- 

 ing one year's growth, and the last-formed 

 circle being external. The characters of 

 the class are given under Dicotyledon.*, 

 which see. 



Exogenous. Growing by addition to the 

 outer parts of the stem. 



Exorhixu. That kind of germination in 



FAL 



which the point of the radicle itself be- 

 comes the first root. 



Exosmose. That force which causes a vis- 

 cid fluid Iving on the outside of an or- 

 ganic membrane to attract watery fluid 

 through it. 



Exostome. The aperture in the outer in- 

 tegument of an ovule. 



Exotic. Plants that are brought from for- 

 eign countries. 



Expanded. When a flower is fully blown. 

 See Diffuse. 



Exscapus. Without a stalk. 



Exserted. Where one part protrudes beyond 

 another by which it is surrounded; as 

 the stamens or styles beyond the mouth 

 of some tubular corollas. 



Exsuccous. Juiceless. 



Exterior. Exposed, and not invested by 

 any part or covering. 



Extine. The outer coat of a pollen grain. 



Extra. On the outside of or beyond; as, 

 extra-ax illar is, beyond the axil; extra- 

 foliarius, 'beyond a leaf; extra-medianus, 

 beyond the middle. 



Extrorse. Turned outward fi-om the axis of 

 growth of the series of organs to which it 

 belongs. 



Eye. A term in gardening for a leaf -bud; 

 also for the center or the central markings 

 of a flower. 



F. 



~7y ahacecE. The Bean or leguminous 

 family, a natural order of Calycifloral 

 Dicotyledons, better known by the name 

 Leguminosce, under which head their pe- 

 culiar characteristics are described. The 

 plants are distinguished either by their 

 papilionaceous (pea-like) flowers, or by 



their fruit being a legume, a pod like that 



of the Pea or Bean. 

 ! Fades. The general habit or appearance 



assumed by each particular species. 

 Fwcula. The farinaceous matter which 



forms starch, etc. 

 Falcate, Falciform,. Plane and curved in 



