AVRIL

1 Mercurialis annua, fl,

2 Primula cbinensis, id.

3 Viola odora alba , id.

— Oxalis alba , id.

— Ranunculus bulbosus , id.

— Fritiilaria meleagris , id.

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3 Anchusa semperrirens, fl.

— Chiranthus cheiri , id.

— Cynoglossura omphalodes, p. f.

— Tulipa pracox , fl.

— Hyacinthus orientalis , id.

— Hyacinthus botryodes , p. f.

4 Hyacinthus racemosus , p. 1 .

— Fritillaria rubra , fl.

8 Fritillariaflava , id.

— Fritillaria striata , id.

6 Anémone pulsatilla , dite Poasbloem , id.

— Cardamine pratensis , id.

7 Anémone nemorosa , id.

8 Glechoma hederacea , id.

— Narcissus bicolor, id.

— N. prîmulinus , id.

— N. tubiflorus , id.

— Orchis mascula, id.

9 Lunaria annua, id.

10 Viola tonbrigensis , id.

1 1 Leontodon taraxacum , p. f.

12 Saxifraga crassifolia , id.

13 Narcissus viridiflorus , fl.

14 Borago officinalis, id.

15 Stellaria holostea , id.

16 Tulipa sylvestris , id.

17 Geum rivale , id.

18 Cyclamen vulgare, id.

19 Allium ursinum , id.

— Narcissus augustifolius , id.

20 Leucojum vernura , id.

— Narcissus tazetta , id.

22 Cardamine araara, id.

23 Hyacinthus nonscriptus , id.

24 Prunus spinosa , id.

— Gentianella acauiis, id.

26 Primula veris , p. f,

27 Narcissus major, fl.

28 Ajuga reptans, id.

— Trollius asiaticus , id.

— Ulex europœus , p. f.

— Scilla cainpanulata , id.

— Galeobdolon luteum , id.

— Arum maculatum.

— Pyrus malus, fl.

— Ranunculus repens , id.

— Erysimum alliaria, id.

29 Géranium robertianum, id.

— Narcissus biflorus , id.

— Dentaria bulbifera , id.