. British marine algae : being a popular account of the seaweeds of Great Britain, their collection and preservation. Marine algae. 129 But, as reerards the species D. angustissima, I can only say, I have never met with it in the growing state; the only specimen I possess was given to me by the late Dr. Cocks, of Plymouth, who received it, with some others, from Mrs. Griffiths, of Torquay, that lady having found it in Torbay, about the time it was discovered by Mr. Brodie, more than fifty years ago. The fructification of this rare plant seems to me to be identical with that of
. British marine algae : being a popular account of the seaweeds of Great Britain, their collection and preservation. Marine algae. 129 But, as reerards the species D. angustissima, I can only say, I have never met with it in the growing state; the only specimen I possess was given to me by the late Dr. Cocks, of Plymouth, who received it, with some others, from Mrs. Griffiths, of Torquay, that lady having found it in Torbay, about the time it was discovered by Mr. Brodie, more than fifty years ago. The fructification of this rare plant seems to me to be identical with that of D. alata, and the only difference that I have been able to discover between it and the narrowest form of D. alata in my possession, is the extreme tenuity, or perhaps even the absence of the lateral membrane which is always present in the narrowest form of D. alata, var. angustis- sima. In Fig. 117, b, is represented an enlarged leaf of the pretty species D. ruscifolia. The leaflet arising from the midrib shows the order of growth in this proliferous species, luxuriant specimens being like balls of. Fig. 118. Delesseria hypoglossv/m. crimson leaves. This is the smallest of the genus, and though it is some- times found on the stems of Laminaria digitata (Fig. 46), its more frequent place of growth is on mud-covered rocks near low-water mark. Many years ago I used to take it in great quantity and beauty on the muddy rocks near Mount Batten at Plymouth. In our illustration the coccidium, or spore-bearing tubercle, is represented (as is usual in the Delesseria) as produced from the centre of the midrib, a short distance only below the tip of the leaf. Tetraspores are arranged in oblong groups on each side of the midrib, and generally near the tips of the rounded leaves of the plant. The colour is always a rich deep crimson, and with a little judicious pruning, this species makes an exquisite book specimen. The only British seaweed with which this species may be confounded is D. hyp
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