98 
ORDER LXXXIL PISTIACE^/ 
1. LEMNA. 
1. L. TRisuLCA. Ivy-leaved Duck- weed. June. O 
Ditckes in Askham Logs. Brick ponds on Hob moor, and several 
other places near York. Ditches between Hull and Beverley. In 
the Castle yard, Scarbro’. 
2. L. MINOR. Lesser Duck-weed. June — July. O 
Ponds near York, and throughout the county, common. 
It has been observed, that various kinds of mosses -which grow on walls and house tops, although dried 
by the heat of summer so as to become quite brittle, recover their former verdure and vegetative power 
by the first showers of Autumn. A fact analagous to this, referring to plants destined to grow in ponds 
which fail in dry seasons, affords a striking example of suspended animation and resuscitation, as commu- 
nicated by Mr. Gough, of Kendal. Some plants of L. minor were collected from a pond, in July, 1797, 
dried four or five hqurs in the sun, and preserved in a small box, to March, 1800 ; they were then placed 
in a glass jar with water, and not only revived, but fiowered in the following August. 
3. L. GiBBA. Gibbous Duck-weed. June — July. O 
In ponds near York. Ditches near Beverley. 
4. L. poLYRRHizA. Greater Duck- weed. © 
In ponds near York and Beverley. 
ORDER LXXXIII. JUNCAGINEA:. 
1. TRIGLOCHIN. 
1. T. PALUSTRE. Marsh Arrow-grass. June — July. 1/ 
In wet boggy meadows, frequent. 
2. T. MARiTiMUM. Sea Arrow-grass. May — August. 1/ 
In the salt marshes at Coatham, near Redcar. On the sands 
between Scarbro’ and Filey. Whitby. 
2. SCHEUCHZERIA. 
1. S. PALUSTRis. Marsh Scheuchzeria. June-^July. 1/ 
In Leckby carr, four miles north west of Boroughbridge. Thorne 
moor. 
I have diligently examined Leckby carr, for five seasons, without being able to find a single specimen. 
ORDER LXXXIV. ALISMACE^. 
1. ALISMA. 
1. A. PLANTAGO. Greater Water-plantain. July. 1/ 
In pools, ditches, and on the margins of rivers, common. 
