A DICTIONARY 



OF 



BOTANICAL TERMS. 



A, prefixed to words of Greek 

 origin often signifies absence, 

 as apet'alous, without petals. 

 Before a vowel it is changed 

 to an, as anan' therous, without 

 anthers. 



AbAX lAL, out of the axis. See 



EXCENTRIC. 



ABBRE VlATED, shorter than an 

 adjoining organ, or one with 

 which it is compared. 



ABERRANT, differing widely 

 from the usual form or struc- 

 ture; as: the Fumariaceae have 

 been regarded as an aberrant 

 group of Papaveraceae. 



ABIOGENESIS, see Spontane- 

 ous Generation. 



ABJE€'TION, throwing off with 

 force, as spores or seeds. 



ABJOINT', to separate at a joint. 



ABJUNCTION, the separation 

 of one part from another; de- 

 limitation. Compare Abstric- 

 tion. 



ABNORMAL, differing from the 

 usual structure or condition. 



ABORIG INAL, see Indigenous. 



ABORTION, the non-formation 

 or imperfect formation of an 

 organ, so that it does not per- 



form its usual function. Com- 

 pare Suppression, Degener- 

 ation, Atrophy. 

 ABORTIVE, imperfect, or want- 

 ing. See Obsolete. 



ABRUPT', terminating sud- 

 denly, as a leaf which ends 

 without a tapering extremity, 

 a compound leaf without a 

 terminal leaflet, or a stem 

 which is sharply bent. 



Abrupt it Acu minAte, hav- 

 ing a broad extremity from 

 which a point arises. 



ABRUPT Lt PlN NATE, pinnate 

 without a terminal leaflet, and 

 usually with an even number 

 of leaflets. There may be a 

 terminal point or tendril; even 

 pinnate; equally pinnate. 

 Compare Imparipinnate. 



ABSglS §ION, cutting off sharply, 

 as the separation of the frus- 

 tules of diatoms. Compare 

 Abstriction. 



AB SClSS LAY'ER, a layer of cells 

 formed by renewed cell-divi- 

 sion in the base of the leaf 

 stalk in autumn, the formation 

 of which permits the fall of 

 the leaf. 



