308 BOTANICAL GAZETTE [APRIL 
Figs. 13-1 5.—Short-styled form: anaphase of the reduction division. 
Fics. 16, 17.—Long-styled form: anaphase of the reduction division. 
Fic. 18.—Long-styled form: interkinesis. 
PLATE XXII 
Fagopyrum esculentum 
Fics. 19-21.—Long-styled form: successive stages in the separation of the 
pollen grains. 
Fic. 22.—Short-styled form: mother cell wall from which the pollen, grains 
have fallen. 
Fics. 23-26. ee ea form: tapetal cells Showing successive stages 
in amitotic free nuclear divisio 
Fic. 27.—Long-styled shin megaspore mother cell; nucleus in diakinesis. 
Fic. 28.—Long-styled form: two megaspore mother cells in a single ovule; 
nuclei in pachyténe stage. 
. Houstonia caerulea 
Fics. 29-33.—Long-styled form: -microspore mother cells in early prophase. 
ae 34.—Long-styled form: beginning of ia contraction. 
ge ema d styled form: synapsis. 
Gee 42.—Somatic cells, showing successive stages in growth and 
division. 
PLATE XXIII 
Microspore mother cells of Houstonia caerulea 
Fic. 43.—Long-styled form: loosening of the synaptic knot. 
FIGS. 44, 45 .—Long-styled form: pachyténe stage. 
- Fic. 46.—Long-styled form: tangential view of nucleus in diploténe stage. 
Fics. 47, 48.—Long styled form: strepsiténe stage. 
Fic. 49.—Long-styled form: gemini in process of formation. 
Fic. 50.—Short-styled form: diakinesis. 
Fics. 51-53.—Long-styled form: diakinesis. 
1G. 54.—Short-styled form: anaphase of the heterotypic division. 
Fic. 55.—Short-styled form: polar view of chromosomes in anaphase of 
heterotypic division. 
Fic. 56.—Long-styled form: same stage as fig. 55. 
Fic. 58.—Long-styled form: interkinesis. 
Fic. 57.—Short-styled form: interkinesis. 
Fic. 59.—Long-styled form: reconstruction of daughter nuclei of the homo- 
typic division. 
Fic. 60.—Short-styled form: same as fig. 59. 
Fic. 61.—Long-styled form: separation of pollen grains. 
