They are present from the beginning of the development of the cell-wail, and arise from the spindle fibres, all of which may be continued as connecting threads (endosperm of Tamus communis), or part of them may be overlaid by cellulose lamellae (endosperm of Lilium Martagon), or they may be all overlaid as in pollen mother-cells and pollen grains of Helleborus foetidus.
The following purely Caucasian species also grow on the coastfive species of spearwort, three of saxifrage, Aster caucasica, Dioscorea caucasica, Echinops raddeanus, Hedera colchica, Helleborus caucasica and Peucedanum caucasicum.
Christmas Rose (Helleborus) - One of the most valuable classes of hardy perennials we have, as they flower in the open air when there is little else in bloom.
Winter blooming jasmine, witch hazel, camelia, and helleborus provide lovely flowers and some sweet scents toward the end of winter.
The winter blooming helleborus, sometimes called the Christmans or Lenten rose is a small perennial with lovely pale down-ward facing flowers.