544 Alexander Goodman More Scientific Papers. 



Mr. Britten, with what seemed most exact directions to the locality 

 where this very rare species had been gathered just one hundred and 

 ten years ago ; and, as an undoubted specimen is preserved in the 

 Banksian Herbarium at the British Museum, I can only conjecture 

 that modern alterations, however slight, have led to the extirpation of 

 the plant. 



The British Museum label reads: "July 23. 1773 Pembrokeshire, 

 two miles from St. Davids by the side of a small rivulet in a place calld 

 White sand Bay ^a mile South of St. Davids Head between that.and a 

 farm house calld Trelethen and not above of a mile up the rivulet 

 from the sea : it grew in one place only in a clump." 



The stream is small and easily found, and the distance from the sea 

 so short that I expected to find the Cyperus without any difficulty, espe- 

 cially as we were quite familiar with its appearance in the Isle of Wight 

 localities. There is a road crossing the little rivulet at about the right 

 distance from the sea, and along the stream below this point a bank 

 has been thrown up, dividing a pasture on the east from the field on the 

 western side of the rivulet, which is now under tillage. Still, there are 

 marshy corners which look likely ground, and wet slopes on which some 

 barren stems of the Cyperus might still linger ; but above and below 

 this little bridge and all along the stream we sought most carefully, 

 without finding a trace of the Cyperus, and I fear the one patch observed 

 in 1773 has ceased to exist. 



AT ST. DAVID'S HEAD. 



Statice occidentalis. 

 Sedum Telephium. 

 Genista pilosa. 



Sagina subulata. 

 Allium Scorodoprasum. 

 var. Sibiricum. 



In the case of Genista pilosa we were more fortunate, though at 

 first this plant quite eluded us, through the incorrect description of its 

 locality given in the ' Botanist's Guide.' It does not grow " on the 

 very western extremity of St. Davids Head" ; and with this misleading 

 direction we spent the best part of two days in searching the extreme 

 headland itself; that is the most westerly portion, which is cut off, as a 

 fort, by an ancient wall and trench. Here was no trace of Genista 

 pilosa, and it was only on the last day of our visit, when walking along 

 the southern slope of the promontory, a good half-mile from the head- 

 land, that we succeeded in finding one of the best plants of St. David's. 

 The Genista is quite local, and not very abundant, but we found it 

 scattered for a hundred yards or two among the heather, close to where 

 the Brake (Pteris aquilina] begins to vary the smoothness of the grassy 

 hill. Only a very few blossoms were in flower. 



A still more remarkable plant, and in Cornwall also a close neigh- 

 bour of the Genista, we gathered in, I believe, its second British loca- 

 lity : Allium sibiricum grows on the broken rocky slopes on the north 

 side of the ancient fort, within and to the westward of the wall. It is 

 quite restricted to a space of less than a hundred yards ; and I must 



