Officinal 



A DICTIONARY 



Operculate 



6FFfC/fNAL, used in medicine or 

 the arts. 



dFF'SflT, a short lateral branch 

 or stolon proceeding from the 

 base of the plant, which serves 

 or may serve for propagation. 

 It usually takes root of itself. 

 Lateral bulbs are also called 

 offsets. 



dFF'SHOOT, an offset, or lateral 

 branch. 



OIL-TUBE, see Vitta. 



OLEAG'LNOTJS, oily. 



OLERA'CEOtJS, esculent; used for 

 food ; applied mainly to garden 

 vegetables. 



OlIgAN'DROUS, having few sta- 

 mens; oligostemonous. 



6l'IgAR€H, applied to a fibro- 

 vascular cylinder having few 

 rays, i.e., containing or repre- 

 senting few fibrovascular bun- 

 dles. 



dllGOPHYL'LOu'S, having few, 

 or comparatively few, leaves. 



dLlGOSPER'MOUS, few-seeded. 



6LIG0STEM ONOtJS, see Oligan- 



DROUS. 



6l! VA'gEOUS, dusky green. 



tiMNl V'OROUS, applied to a para- 

 sitic fungus which attacks 

 many kinds of plants. 



dM'PHALODE, see Omphalo- 

 dium. 



dMPHALO'DitTM (pi Omphald- 

 dla), the central part of the 

 hiluin, containing the vessels 

 which enter the raphe or cha- 

 laza. 



ONE SID ED, see Secund, Uni- 

 lateral, and Homomalous. 



6nt6G'ENY, the study of the 

 development of an individual 

 through all its stages. Com- 

 pare Phyllogeny. 



6'OCYST, a female organ or oogo- 

 nium of doubtful nature. 



OdG'AMY, the conjugation of 

 gametes which are dissimilar 

 in form. Compare Isogamy. 



OOGONIUM (pi. Oogo'nla), the 

 female sexual organ in Oo- 

 sporese before fertilization, con- 

 taining one or more oospheres, 

 as in Perouospora. 



66 NU'CLEUS, the nucleus of an 

 oosphere. Compare Spermo- 

 nucleus. 



O'OPHORE, the first or sexual 

 stage or generation in plants 

 having an alternation of gen- 

 erations, as ferns; oophyte. 

 Compare Spokophore. 



OOPHORlD'IUM (pi. Oophorid'ia) 

 (obs.), see Macrosporangium. 



OOPHYTE, see Oophore. 



OOSPERM, see Oospore. 



O'OSPHERE, the oospore previous 

 to fertilization; i.e., the cell or 

 protoplasmic mass which after 

 fertilization becomes the oo- 

 spore. 



O'OSPORAngE, see Oosporan- 

 gium. 



OOSPORANGIUM (pi. Oosporan'- 

 gia), an old term for oogonium. 



O'OSPORE, a fertilized oosphere; 

 oosperm. As a result of fer- 

 tilization the oOsphere, thus 

 changed to an oospore, takes 

 on a firm cell-wall and acquires 

 the power of germination. 



OPAQUE', having a dull surface; 

 neither transparent nor shining. 



6'PEN, applied to fibrovascular 

 bundles which always contain 

 cambium capable of further 

 growth, as in exogeus. Com- 

 pare Closed. 



OPER'CULAR, like an operculum; 

 operculate. 



OPER'CUlATE, having an oper- 

 culum. Compare Deopercu- 

 late. 



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