CALENDAR, 1819. 375 



3d. The Cynoglossum omphalodes, so remarkable for its 

 brilliant blue colour, still in bloom.* 



5th. A fine warm spring day, alter a night of rain. 

 Schoeniclus arundinaceus observed. Swallows and Martlets 

 become common. Orchis morio in flower. 



6th. The following plants now in full flower : -Ranuncu- 

 lus bulbosus, R. acris, Fragaria sterilis, Erysimum alliaria, 

 Veronica chamacdrls, V. serpyllifolia, V. agrcstis, V. arvensis, 

 and V. hcderifolia, Anthoxanthum odoratum. Valeriana 

 dioica, and V. locusta, Phleum pratense. Alopecurus pra- 

 tensis, Briza major, Poa annua, P. trivialis, and P. pratensis. 

 Galium cruciatum, Alchemilla arvensis, Sagina erecta, Myosotis 

 arvensis, M. versicolor, and M. umbrata. Borago officinalis, 

 Primula elatior, and P. veris. Anagallis arvensis, Viola 

 tricolor, and V. tonbrigensis (supposed a variety), Sanicula 

 Europoea, Caucalis anthriscus, Scandix pecten veneris, 

 Viburnum lantana, Narcissus biflorus, Allium ursinum, Scilla 

 campanulata, Vaccinium myrtillus, Acer pseudoplatanus, and 

 A. campestris. Chrysosplenium alternifolium (wild), Arenaria 

 trinervia, Lychnis dioica purpurea and L. dioica alba, 

 Cerastium vulgatum, Euphorbia amygdaloides, Mespilus 



resembles it ; but which in this district is not near so common. The former 

 is a troublesome weed in corn ; and its seeds, when deeply buried by 

 ploughing, work their way by degrees up to the surface, and grow again. 

 This circumstance, which is common to many plants, leads us to inquire by 

 what means seeds possess this ascending power, when buried, of regaining 

 the surface of the earth ? 



* There are three plants in our gardens noted for the brilliancy of their 

 light blue flowers. The Cynoglossum is the purest fine ultramarine colour ; 

 the Veronica chamaedrys has a very slight tint of the red in its composition ; 

 and the Anchusa sempervirens (the third I allude to) has a tint of greenish. 

 The blue of the Cyuoglossum being the only perfect blue. 



