ON THE FLORA OF SOUTH BEDFORDSHIRE. 829 
Salia fragilis L.; S. viminalis L. 
S. purpurea Letoed Limbury, Biscot. 
S. triandra L.—Local. New Mill End. 
S. cinerea L.; S. Caprea L.; S. alba L. 
Typha latifolia L. 
Sparganium ramosum Huds. ; S. simplea Huds. 
L 
Lemna trisulca L.—Loeal. Limbury Ponds. 
L. minor L.; L. gibba L.—Local. Luton Hoo. 
L. polyrhiza L.—Rare. roe ae 
* Potamogeton natans L.—Com 
‘od to dene L.—Loeal. Limbury Ane 
. crispus L.; P. densus L.—Com 
P. pusillus Ty, boal. New Mill End, 
P, ae L.—Luton Hoo Lake 
i a ucens Li., var. acuminatus.—Occurs in the River Ouse, near 
ape et brachystemon Gay.—Local. The sources of the Lea, 
Biseot, Luton Hoo Lake. 
Triglockin palustre L, 
Sagittaria sane? L.—Local. River nt Leighton. 
lisma Plantago L., b. lanceolatum.—Flitwi k Marsh. 
Butomus peti: i —Rare, by the iver TD New Mill End. 
Elodea canadensis Mich. 
Orchis pyramidalis L.—Abundant on the chalk hills. 
O. ustulata L. — Rare; apparently limited to the lower chalk 
at ae 
Morio L. — Locally abundant in meadows on clay so 
Pepperstoc, Farley, Caddington. At the last-named station gon 
flowers vary from a dark purple to a cream-white 
annie L.; 0. latifolia L.; O. maculata tie 
Gymnadenia conopsea Brown.—Abundant on the chalk hills. 
Habenaria viridis Brown.—Locally abundant in moist meadows. 
Pepperstock, Farley, Sundon 
H. chlorantha Bab.—Abundant in moist woods. 
Ophrys apifera Huds.—Erratic on the lower chalk escarpment. 
Barton, 1879; Streatley, 1881; Sharpenhoe, 1882. Carefully 
searched for in 1880, but could nowhere be found. 
. muscifera Hu ds. — Rare, on the es escarpment, but con- 
stant in appearance. Streatley and Sun 
Spiranthes anitundialis Rich. Y Tamited | ‘ thie chalk escarpment ; 
uncertain in appearance. Plentiful in 1879-80 on Pegsdon and 
Barton Hills; <n ... in 1881 and 1882; in blossom, 1883. 
Listera ovata Bro 
Neottia Nidus-avis oe tiek, Uncertain. Daffodil Wood, 1877 
Sundon Wood, Dumb Hill’s Wood, 1878. 
Epipactis latifolia Auct 
Cephalanthera grandiflora Bab.—Rare. Under beech trees by 
the N the New Mill End Road, Markham Hills. 
a e Potamogetons have been examined by Mr. Arthur Bennett, to whom 
the writer’s best thanks are due 
