Part 49

Order LXXXIII.--=Typhaceæ.=

Genus II.--TYPHA latifolia, 51; angustifolia, 52

Order LXXXIV.--=Aroideæ.=

Genus I.--ARUM maculatum, 15; italicum, 16

Order LXXXV.--=Lemnaceæ.=

Genus I.--LEMNA minor, 45; trisulca, 46; gibba, 46; polyrhiza, 46

Order LXXXVI.--=Alismaceæ.=

Genus IV.--SAGITTARIA sagittifolia, 113

Order LXXXVII.--=Naiadaceæ.=

Genus III.--POTAMOGETON natans, 81; polygonifolius, 81; plantagineus, 81; prælongus, 82; crispus, 81; densus, 81

Order LXXXIX.--=Gramineæ.=

Genus VI.--ANTHOXANTHUM odoratum, 25

Genus VIII.--ALOPECURUS agrestis, 40; alpinus, 40; pratensis, 40; geniculatus, 40

Genus X.--PHLEUM pratense, 25

Genus XXV.--AVENA fatua, 116; pratensis, 116; pubescens, 117; sativa, 116

Genus XXXVI.--DACTYLIS glomerata, 24

Genus XXXVII.--BRIZA media, 40; minor, 40

Genus XXXVIII.--POA annua, 24

Genus XLI.--BROMUS erectus, 38

Genus XLIII.--LOLIUM perenne, 38; temulentum, 39

Genus XLVII.--HORDEUM murinum, 19

Order XC.--=Filices.=

Genus VII.--ASPLENIUM trichomanes, 124; viride, 124

Genus VIII.--SCOLOPENDRIUM vulgare, 123

Genus XII.--NEPHRODIUM filix-mas, 124; spinulosum, 125; oreopteris, 125

Order XCI.--=Equisetaceæ.=

Genus I.--EQUISETUM arvense, 125

EXOTIC GENERA.