Histology 



OF BOTANICAL TERMS. 



Homosporous 



HfST6L'6GY, the science of the 

 structure of tissues. Compare 

 Morphology. 



HOARY, grayish white; canes- 

 cent. 



HOLD-FAST, any root or root-like 

 organ whose chief function is 

 to retain the plant in place, as 

 the afirial roots of ivy, or the 

 suckers or rhizoids of many 

 sea-weeds; crampon. 



HdLERA'CEOtJS, see Olera- 

 ceotjs. 



HdLOCAR'POtJS, having the peri- 

 carp entire. (Rare.) 



HdLOSAP'ROPHYTE, a complete 

 saprophyte: one which lives 

 entirely on dead organic mat- 

 ter. 



H6l6SERIc'EO"&S, covered with 

 very short silky hairs hardly 

 visible to the eye. Compare 

 Velutinous. 



HOMOBLAs'TIC, said of the 

 embryo when in its usual 

 position with the radicle di- 

 rected toward the micropyle 

 and the cotyledons in the oppo- 

 site direction. Compare Enan- 

 tioblastic. 



HOMOCAR'POtS, bearing fruit all 

 of one kind. Compare Hete- 

 rocarpous. 



HOMOcEn'TRIC, see Concen- 

 tric. 



HOMO€HRO'MOtS, of uniform 

 color. 



HOMdD'ROMAL, see Homodro- 

 mous. 



HOM&D'ROMOUS, turning contin- 

 uously in the same direction. 

 Compare Heterodromous. 



HOMODY'NAMOXJS, of equal 

 strength, size, or vigor. 



HOMdG'AMOtJS, having all the 

 florets of a head in Compositae 

 alike in sex. Compare Hete- 



rogamous. Also used for 

 Synacmic, which see. 



HOMOGENEOUS, having the same 

 nature or structure throughout. 



HOmOGONOUS, having the sta- 

 mens and pistils alike in char- 

 acter in all flowers of the 

 species; homostyled. Com- 

 pare Heterogonous. 



HOMOldM'EROUS, applied to a 

 lichen thallus in which the 

 gonidia and hyphaj are min- 

 gled together aud not dis- 

 tinctly stratified. Compare 

 Heteromerous. 



HOMdL'OGOtJS, of the same mor- 

 phological nature, as leaves, 

 bracts, sepals, petals, stamens, 

 and pistils are all homologous, 

 or forms of the same funda- 

 mental organ. 



HOM OLOGUE, a part homologous 

 with another, as a stamen with 

 a leaf; homotype. Compare 

 Analogue. A nectary, for 

 example, is in some cases the 

 hDmologue of a stamen and in 

 others of a petal, but it is 

 always the analogue of any 

 other nectary. 



HOMdL'OGY, correspondence in 

 structure or morphological na- 

 ture. Compare Analogy. 

 See Homologous and Homo- 

 logue. 



HOMdM'AlOtJS, applied to leaves 

 or other organs which originate 

 on the different sides of a stem, 

 but are all turned toward one 

 side. Compare Secund. 



HOMOMOR'PHOtJS, of the same 

 shape or character, as when 

 the disk-flowers as well as the 

 ray-flowers of a head in Com- 

 posite are ligulate. 



HOMOPET'ALOtS (obs.), see 

 Regular. 



HOMdS'POROTJS, having asexu- 

 ally produced spores of only 



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