130 Proceedings of the Biological Society of Washington. 



Strawberry (Fragaria virginiana) September 22, 1878. 



Bird's foot violet {Viola pedata) September 22, 1878, October 31, 1918, 

 December 8, 1878. 



White violet (Viola striata) September 22, 1878; about Christmas, 1918. l 



Golden Alexanders (Zizia aurea) November 16, 1918. 



Flowering dogwood (Cornus florida) October, 1918. 



Azalea (Azalea nudiflora) October 13, 1878. 



Laurel (Kalmia latifolia) Autumn, 1874. 



Deerberry (V actinium stamineum) October 13, 1878. 



Pink Gentian (Sabatia angularis) October 27, 1878. 



Sweet William (Phlox divaricata) October 16, 1873. 



Blueweed (Echium vulgare) October 8, 1880. 



Speedwell (Veronica officinalis) October 8, 1873. 



Bluet (Houstonia caerulea) September 7, 1879, December 8, 1918. 



Bluet (Houstonia purpurea) October 13, 1878. 



Bluet (Houstonia angustifolia) September 12, 1880. 



Honeysuckle (Lonicera japonica) October 13, 1878; various dates up to 

 December 1, 1918. 



Professor Chickering, in the article cited, noted that strawberries and 

 black-berries produced ripe fruit from autumnal flowers in 1875. 



Late Flowering. 



The flowers that normally bloom or continue to bloom in autumn include 

 among their number several which on account of their extreme persistency 

 in putting forth new flowers, or because of the conspicuous lasting qualities 

 of their bloom, form the interesting group, referred to previously, which 

 may best be discussed under the head of late flowering. Special attention 

 was given to this group in the latter months of 1918. Despite the fact that 

 the dates recorded were preceded by numerous severe frosts the following 17 

 species were observed in bloom : 



Carpet weed (Mollugo vertitillata) November 17. 



Peppergrass (Lepidium virginicum) December 8, 26. 



Witch hazel (Hamamelis virginiana) December 1. 



Red clover (Trifolium pratense) November 16. 



Sweet clover (Melilotus alba) November 16. 



Mercury (Acalypha virginica) November 16. 



Spurge (Euphorbia corollata) November 16; flowers very dry, papery. 



Goldenrod (Solidago caesia) December 8. 



Goldenrod (Solidago bicolor) November 16, December 1. 



Goldenrod (Solidago erecta) December 6. 



Goldenrod (Solidago racemosa) November 16, December 1. 



Aster (Aster patens) November 16, December 1, 30. 



Aster (Aster cordifolius) December 8. 



Aster (Aster linariifolius) November 17. 



Yarrow (Achillea millefolium) November 16, December 1, 8, 30. 



lCultivated. 



