SiGERSON — Additions to the Flora. 
195 
Oedee XXIII. Lttheace^. 
Lythrum salicaria (Linn.). Purple Loose-strife. 
Foyle bank, at mouth of Glenmornan river. Scarce in the locality, 
though common on the opposite bank of the Poyle (eleventh district). 
Oedee XXIY. Ojstageace^. 
Circ£ea alpina. Alpine Enchanter'' s Nightshade. 
^ Bank of the Glenmornan river, at Lower Holyhill, about three 
miles north of the glen of Strabane, in which Admiral Jones discovered 
it. It has not been recorded from the other counties of the district. 
Oedee XXYIII. Ceassulace^. 
Cotyledon umbilicus (Linn.). Wall Pennywort, 
Walls of high road, near Strabane glen ; walls of the sweat- 
house," Eallylaw, Liscurry. 
Oedee XXXVI. Valeeian-ace^. 
Valeriana officinalis. Wild Valerian. 
Eiver bank and ditches, Lower Holyhill. JN'ot frequent. 
Oedee XXXYIII. Composite. 
Bidens cernua (Linn.). Nodding Bur-marygold. 
Water ditches beside Leckpatrick floe bog. J^ot observed else- 
where. 
Achillea ptarmica (Linn.). Sneezewort. 
Banks. Bather infrequent. 
Chrysanthemum segetum. 
Yar p pnsillum. Zeast Corn Mary gold {New Variety).'^ 
The common corn marygold is a frequent plant in cultivated fields 
in this district, where it is popularly called the gilgowan." Usually 
over a foot high, strong and straggling, it has broad ovate-stalked 
lower leaves, stem clasping, deeply dentate upper leaves, and large 
conspicuous yellow flowers. In a fallow grass field, f at Liscurry, lying 
between the white fort and the Donemana road, I discovered a very 
well marked variety, which I propose to name as above. 
This variety has a very slender erect stem, unbranched, two or 
three inches in height ; leaves sessile, linear, entire, under half an inch 
in length ; capitulum small, having only about half-a-dozen florets. 
It had become established all over the field, and showed its flower 
heads on a level with the grass, by which its fragile stems, slighter than 
* See Plate XVII., fig. 2. 
t And (since) in other fields. 
