Carex paradoxa, whose headquarters are near Harefield, occurring in some quantity in both Herts and Middlesex, but it is rather as a straggler from the head centre that it extends into our area. Another local and much misunderstood species, Carex elata, or stricta as it is more fre- quently called, grows near Rusholt and will probably be found near Burnham. Carex montana has been reported from Chalfont, but I have not seen it there, and another plant of the sedge tribe grows near Chalfont Park and is Scirpus caricis (the Blysmus compressus of many authors). The small polygonum (P. minus) is common by the Chess, growing with Sagina nodosa in the peaty borders of the stream, and these chalk streams with their nearly equal temperature throughout the year seem especially to favour the growth of peat. Near Iver Heath, Smith's cress (Lepidium heterophyllum var. canescens) grows, and a fumitory, F. Boraei, grows near Uxbridge. Other local plants of the district are the red mint (Mentha rubra) growing at Iver Heath, the climbing bindweed (Polygonum dumetorum), the mild persicaria (Polygonum mite), plentiful at Iver, the tower cress (Arabis perfoliata) near Denham, and the shining crane's- bill (Geranium lucidum), which is especially frequent about Denham ; the black alder (Rhamnus Frangula) near Tilehouse, the spearwort (Ranunculus Lingua) near Chalfont, the bear's-foot (Helleborus viridis), near Chalfont etc. ; the columbine (Aquilegia vulgaris) near Fulmer, the mousetail (Myosurus) near Denham, the pansies Viola saxatilis and V. Paillouxi near Three Households, and the dog violet (Viola canina) and hybrids of that species with V. Riviniana grow on the heaths in the north. The barberry (Berberis vulgaris) near Colnbrook, as pointed out by Gerarde in 1597 ; the hybrid poppy (Papaver hybridum) near Chalfont, the cress Barbarea intermedia near Three Households, the coral-root (Cardamine bulbifera) near Amer- sham, etc. ; the pinks Dianthus Armeria and D. prolifer, both reported from near Chalfont, but as yet I have not been able to verify them ; the sandwort (Arenaria tenuifolia), Chalfont ; the pearlworts Sagina ciliata and S. subulata, Iver Heath ; the tutsan (Hypericum Androsismum), Chalfont, etc. ; the marsh St. John's wort (H. elodes), Iver Heath, perhaps now eradicated ; the all-seed (Millegrana Radiola), Iver ; the petty whin (Genista anglica), common on the heaths about Amersham and Penn; the dyer's weed (G. tinctoria), Fulmer; the dwarf gorse (Ulex minor), abundant on the Tertiary commons ; the zig-zag clover (Trifolium medium) at the Chalfont kilns ; T. striatum, Iver ; the yellow vetchling (Lathyrus Aphaca) near Denham ; the crimson vetchling (L. Nissolia), Denham, first reported by John Hill in 1746 ; the cinquefoil (Potentilla argentea), Fulmer, etc. ; the sweet agrimony (Agrimonia odorata) near Homer End ; the rose Rosa systyla, very frequent in the Misbourne valley ; the service tree (Pyrus Torminalis), at Fulmer and Wraysbury ; the grass of Parnassus (Parnassia palustris) near Chenies ; the orpine (Sedum Telephium), Chenies, etc. ; the stonecrop (S. dasyphyllum), Amersham, etc. Both sundews, Drosera rotundifolia and D. intermedia or longfolia, have been recorded for Iver Heath ; the milfoil (Myriophyllum alterniflorum) is common in the Colne ; the willow herb (Epilobium roseum), at Chalfont, etc. ; E. tetragonum near Wraysbury ; the Alexanders (Smyrnium Olusatrum) formerly grew about Uxbridge and Denham, the great burnet saxifrage (Pimpinella major) near Chesham, the lambs' lettuce (Valerianella rimosa) near Iver and Denham ; the cudweed (Filago galllca) was seen by Dr. Lightfoot at Iver but has not been recently found, the camomile (Anthemis nobilis) near Iver Heath, the feverfew (Chrysanthemum Parthenium) near Langley, and I think native ; the swine's succory (Arnoseris pusilla), recorded on old authority from Langley ; the hawkweed (Hieracium murorum var. pellucidum), Amersham ; H. rigidum near Iver ; the smooth cat's-ear (Hypochcæris glabra), Denham ; the sheep's scabious (Jasione montana), Iver ; the huckleberry (Vaccinium Myrtillus), Iver Heath, perhaps now confined to the Black Park ; the heaths Erica Tetralix, E. cinerea and Calluna Erica ; the winter green (Pyrola minor), Great Missenden ; the yellow bird's-nest (Monotropa) ; the scorpion grass (Myosotis repens), Chalfont; the dodder (Cuscuta Epithymum), Iver, etc. ; the deadly nightshade (Atropa Belladona), Chalfont, etc. ; the calf's snout (Antirrhinum Orontium), Thorney, etc. ; the broom-rape (Orobanche Rapum-genistæ), Fulmer ; the toothwort (Lathrea Squamaria), Chalfont, etc. ; the peppermint (Mentha piperita), Iver Heath ; the calamint (Calamintha parviflora or Nepeta), abundant on the chalk above the Chalfonts ; the small skullcap (Scutellaria minor) near Denham ; the upright ground ivy (Stachys arvensis), Thorney, etc. ; the dead-nettle (Lamium hybridum), Thorney, etc. ; the buck's-horn plantain (Plantago Coronopus) ; the goosefoots Chenopodium polyspermum, Chalfont, etc. ; C. ficifolium, common in the lower part of the district ; C. opulifolium, common about Drayton ; C. murale, Iver, etc. ; the persicaria (Polygonum maculatum), common in the lower part near Staines ; the great bistort (Polygonum Bistorta), near Uxbridge ; the golden dock (Rumex maritimus), Chalfont ; the birthwort (Aristolochia Clematitis), recorded from Denham by John Hill ; the spurge laurel (Daphne Laureola), Chalfont, etc. ; the mistletoe (Viscum album), Denham, Wraysbury, etc. ; the hornbeam (Carpinus Betulus), abundant about Chesham and Amersham,
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