CALEXDAE OF NATUEAL PEEIODIC PHENOMENA. 309 



April ISth. — Ground Iv^^, Grleclioma liecleracea, fl. 

 ,, ,, - —Sycamore, Acer pseudo-platanus, fol. 



,, 18th. — Birch, BeUila alia, fol. 

 ,, ,, — Beech, Fagus sylvatica, fol. 

 ,, ,, — Corncrake, Crex pratensis, first heard. 



,, ,, — Hyacinth, Hyaeinthus non-scriptns, fl. 



,, 20th. — Hazel, Corylus avellana, fol. 



,, 21st. — Lime, Tilia JEur^jpcca, fol. 



,, ,, — Early pnrple Orchis, Orchis mascula, fl. 

 ,, ,, — Cuclcoo, Cuculus canorus, first heard. 



,, ,, — Orobus tuherosus, fl, 



,, 23rcl. — Sauce alone, Erysemum alliaria, fl. 



,, 26th. — Lilac, 8y ring a vulgaris, fi. 



,, ,, — Brook-lime, Veronica Beccabunga, fl. 



,, 28th. — Yellow Loosestrife, Lysimachia neniorum, fl. 



,, ,, — Wooclruffe, Asperula odorata, fl. 



April 30th. — Lotus corniculatus, fl. 



,, ,, — Tormentilla officinalis, fl. 



,, ,, — Milkwort, Polygala vulgaris, fl. 

 May 1 st. — Oak, Quercus robar, fol. 



,, 2nd. — Sivift, Cypselus apus, arrives. 



,, 3rd. — Broom, Cytisus apus scoparius, fl. 



,, 5th. — Whitethorn, Crateegus oxycantha, fl. 



,, ,, — Korse-chestnut, JEsculus hippocastanum, fi. 



,, 8th. — Ash, Fraxinus excelsior; fol . 



,, 10th. — Bugle, Ajuga reptans, fl. 



,, 12th. — Bees, first stvarm. 



,, 13th. — Flm, TJlmus campestris, fol. 



,, 22nd. — Earth nut, Bunium flexuosimi, fl. 



,, 24th. — Elder, Sambucus nigra, fi. 



,, 25th. — Plantago media, fl. 



,, 27th. — Eox-glove, Digitalis purpurea, fl. 



,, ,, — Mountain Ash, Pyrtis auciiparia, fi. 



,, 29th. — Sanicle, Sanicula Europpea, fl. 



,, 30th. — Dog-rose, Rosa canina, fl. 



,, ,, — Forget me not, Myosotis palustris, fl. 



,, ,, — Yellow rattle, Rhinantkus crista-galli, fi,. 



,, ,, — Columbine, Ac[uilegia vulgaris, fl. 

 June 1 st. — Wild guelder rose, Viburnum opulus, fl. 



