500 



The following plants were exhibited : — 



1. Sisyrinchium fanceps? ). — Communicated by the Rev. H. L. 

 Jenner, by whom it had been received as an indigenous Irish plant, 

 collected in a wood near Woodford, county of Galway. The speci- 

 mens were past flowering, but the genus is certain, and the species 

 probably correct. If truly native, this will be another added to the 

 short list of plants common to America and the British Isles, but un- 

 known in Europe, unless as naturalized plants. 



2. Ranunculus Lenormandi, Schultz. — Communicated by Mr. 

 James Backhouse, from the head of Coniston Lake ; also by Mr. 

 Hewett Watson, from Esher Common, Surrey. This has been long 

 known, but has usually (and perhaps correctly) been considered a va- 

 riety of R. hederaceus. The Esher specimens are larger, and less 

 like R. hederaceus than are those of Coniston. It is the variety 

 "partitus" of the ' London Catalogue.' [See Phytol. ii. 467, 497]. 



3. Erica Mackaii, Hook. — Seven specimens selected from others 

 communicated by Mr. Mackay. They were selected in order to show 

 that Mackaii passes into Tetralix by intermediate forms, which illus- 

 trate the gradual change of habit and charactf r. 



4. Glyceria Jluitans, Br., and G. plicata, Fr. — Communicated 

 by Mr. Moore, from a field near Hampstead, to illustrate the diffe- 

 rences between the (reputedly two) species. [See Phytol. ii. 484]. 



5. Saxifraga umbrosa, Linn. — A numerous series, selected from 

 others comnuuiicated by Mr. Mackay and Mr. Andrews, illustrating 

 the gradual change in the character of the leaves, from the crenate 

 form found in Yorkshire and on the Pyrenees, to the very acutely ser- 

 rate form named " serratifolia." Of this latter there is a duplicato-ser- 

 rate sub-variety, which Mr. Andrews sends under the name of 

 " Ogilby's Saxifrage." 



6. (Enanthes. — A selection from the specimens collected by the 

 Rev. Andrew Bloxam and Mr. Lees, in 1845. The specimens of 

 Lachenalii sent by Mr. Lees, had the roots broken short, so that no 

 thickness or tuber-like portion appears. The roots of Mr. Bloxam's 

 plants of Lachenalii were whole, and mostly showed a very decided 

 thickening at one to three inches below the base of the stem. One 

 of these had short and fusiform roots, precisely of the same character 

 with the roots of Mr. Lees' examples of peucedanifolia or silaifolia, 

 showing indisputably that the root alone would not distinguish the 

 two species. Two of Mr. Lees' specimens of pimpinelloides {Linn.) 

 had most different roots, although both were in the early flowering 

 stage : in one the knobs were numerous, and so fully grown as to 



