Yorkshire Naturalists at Stamford Bridge. 301 
weed, the grass-like Fennel-leaved Pondweed, and the Yellow 
Water-lily. 
On the mud and partly in the river were the rare Water- 
Rocket and the Flowering-Rush. 
Near Aldby Lock were the Thyme-leaved Sandwort, 
Common Sowthistle, Mare’s-tail, and the Great Branched Bur- 
reed. Passing through Aldby Park, we saw the Dogwood and 
the Rose-bay Willow Herb. 
Buttercrambe Woods proved a happy hunting ground. 
Here two of the Fern tribe are exceedingly well-developed, 
the Male Fern and the Bracken. In one part was a fine growth 
of the Lady Fern, Spiny-Buckler-Fern, Broad Prickly-toothed 
Fern, Oak Fern, and the Beech Fern. 
On the partly dried bed of a pool were two fine compact 
masses of the Narrow-leaved Cotton-grass, accompanied by 
abundance of Bog-bean, the Marsh Cinquefoil, and the stately 
Cyperus-like Sedge. 
In another pool was abundance of the Great Reed Mace, 
commonly called the Bulrush, with many spikes gone to seed. 
On another piece of marshy ground were a few interesting 
plants, the All-Seed or Flax Seed, Bog St. John’s Wort (both 
found by Mr. Cheetham), Creeping St. John’s Wort, and the 
Bog Pimpernel. During the excursion three other St. John’s 
Worts were seen, viz., the Hairy St. John’s Wort, Perforated St. 
John’s Wort, and the Marsh St. John’s Wort. A fine specimen 
of the Marsh Lousewort was seen in the wood. 
Near the keeper’s House is a very large mass of Honeysuckle 
which was all in the yellow or second stage of its life-history. 
The most interesting plant was shown by Mr. Mennell who 
found it some time ago, although it had been previously known 
for some time by certain members of the Friends’ School, York, 
This plant is the Interrupted Club Moss (Lycopodium annott- 
num), the rarest of all our Club Mosses. On this occasion the 
solitary sessile clubs or spore spikes were seen on a few plants. 
The Buttercrambe Woods plant also agrees with a specimen 
I have from the Dovrefjeld, Norway. It is hoped that those 
who know the habitat of this rare Club Moss will protect it as 
much as possible. 
MossEs AND HEpaAtics.— Hepatics :—The only species seen 
are of the thalloid kind. These were Conocephalus conicus, 
Lunularia cruciata and Pellia epiphylia, the two former reported 
by Mr. Cheetham after the meeting. 
Sphagna or Peat Mosses.—In the wood were three species 
at least, S. cymbifolium, S. acutifolium and S. squarrosum of 
very fine growth near the Cotton grass habitat. 
True Mosses.—The dominant feature in the wood was 
Leucobryum glaucum. Some of the tufts were loose on the 
1913 Aug. I. 
