GLOSSAKY 



OB 



EXPLANATION OF SOME OF THE TEEMS USED -IN 

 BOTANICAL WORKS. 



A, alpha, privative of the Greek, placed before a 

 Greek or Latin word, indicates the absence of 

 the organ ; thus, aphyllus, leafless, acaulis, 

 stemless. 



Abaxial or Abaxile, not in the axis, applied to 

 the embryo when out of the axis of the seed. 



Abiogenesis, same as Heterogenesis, aname 

 for so-called spontaneous generation from in- 

 organic matter. 



Abnormal, deviating from regularity or from 

 the usual form of structure. 



Abortion, suppression of an organ, depending 

 on non-development. 



Abrupt, ending in an abrupt manner, as the 

 truncatedleaf of the Tulip tree ; abruptly-pin- 

 nate^ ending in 2 pinnee, in other words, pari- 

 pinnate ; abruptly-acuminate, a leaf with a 

 broad extremity from which a point arises. 



Abscission, cutting off, applied to the separa- 

 tion of the segments or frustules of Diatoms, 



Acaulis orAcAULESCENT, without an evident 

 stem. 



Accrescent, when parts continue to grow and 

 increase after flowering, as the calyx of _Phy- 

 salis, and the styles of Anemone Pulsatilla. 



Accrete, grown together. 



AccuMB EN T, applied to the embryo of Cruciferse, 

 when the cotyledons have their edges applied 

 to the folded radicle, 



AcEROSE, narrow and slender, with a sharp 

 point. 



AcHENE or AcH^NiUM, a monospermal seed- 

 vessel which does not open, but the pericarp 

 of which is separable from the seed, 



AcHLAMYDEOUS, having no floral envelope. 



Achromatic, applied to lenses which prevent 

 chromatic aberration, i.e. show objects with- 

 out any prismatic colours. 



AcicULAR, like a needle in form, 



AcicULUS, a strong bristle, 



Acinaciform, shaped like a sabre or scimitar. 



Acinus, one of the pulpy drupels forming the 

 fruit of the Raspberry or Bramble,^ 



Actinenchyma, cellular tissue, having a star- 

 like or stellate form. 



Acotyledono'us, having no cotyledons, 



AcROCARPi, Mosses having theu" fructification 

 terminating the axis. 



AcROGEN and Acrogenous, increasing , at the 

 summit, applied to the stems of ferns, which 

 have a vascular cylinder penetrated by 

 bundles of vessels belonging to tJie fronds ; 

 and stems marked by the scars of the fronds, 



Aculeus, a prickle, a process of the bark (not of 

 the wood), sLsmth.&'R.osz', Aculeate, furnished 

 with prickles. 



Acuminate, drawn out into a long point. 



Acute, terminating gradually in a sharp point. 



Adelphous or Adelphia, in composition, 

 means union of filament's. 



Adherent, united, adhesion of parts that are 

 normally separate and in different verticils, 

 as when the calyx is united to the ovary, 



Adnate, when an organ is united to another 

 throughout its whole length, as the stipules in 

 Rose, and the filament and anther in Ranun- 

 culus. 



Adpressed or Appressed, closely applied to a 

 surface, as some hairs. 



Aduncus, crooked or hooked. 



Adventitious, organs produced in abnormal 

 positions, as roots arising from aerial stems. 



.^STIval, produced in summer. 



^Estivation, the arrangement of the parts of 

 the flower in the flower-bud. 



Affinity, relation in all essential organs. 



Agamous, the same as Crypiogantous. 



Ala, a wing, applied to the lateral petals of a 

 papilionaceous flower, and to membranous 

 appendages of the fruit, as in the Elm, or of 

 the seed, as in pines. 



-Albumen, the nutritious matter stored up with 

 the embryo, called also Perisperm and Endo- 

 sperm. 



Alburnum, the outer young wood of a Dico^- 

 ledonous stem, 



Algology, the study of Seaweeds. 



Alsinaceous, a polypetalous corolla, in which 

 there ai*e intervals between the petals, as in 

 Chickweed. 



Alternate, arranged at diff"erent heights on 

 the same axis, as when each leaf is separated 

 by internodes from those next to it. 



Alveola, regular cavities on a surface, as in 

 the receptacle of the Sunflower, and in that 

 of Nelumbium which is called A Iveolate. 



