202 A SUPPLEMENT TO THE ' FLORA VECTENSIS.' 



Hainan. , It is somewliat remarkable that, with such a geographical posi- 

 tion, the flora of this reef-girt islet should show an unmistakable affinity 

 with that of the great Australian continent, from which it is distant about 

 one thousand nine hundred miles, the large islands of Borneo, Celebes, 

 Papua, the Philippines and the Moluccas being interposed. The follow- 

 ing are — so far as my memory serves me — all the plants liitherto met 

 with on Prata Island : — 



Senebiera vdeyrifoha, De Cand. ; Porlnlaca austrulis, Eiidl. ; Triiim- 

 fetta procumbens, Forst. ; Sesuvium Forti'lacaatrnm, L. var. ?* Scavola 

 Kwnitjii, Vahl ; Tournefortia argeutm, L. f. ; Ipomcea congesta, 11. Br. ; 

 Ipomcea Pes-caprfe, Roth ; Euphorbia Atuto, Porst. 



These species are found without a single exception in Queensland, and 

 many of them also in North Australia ; and, though some are more or 

 less difi"used as littoral plants through the Pacific isles, the Malayan Archi- 

 pelago, and the South Asiatic coasts, they all seem primarily of Austra- 

 lian origin. The occuiTence of Calogyne chineusls, Benth., Thymnotm 

 chinemis, Benth. j-f and Phihjdrum lanwjhwHnm, Banks, in S.E. China, 

 aflfords curious evidence of a connection bet',veen the Southern Asiatic and 

 Korth-eastern Australian floras. 



A SUPPLEMENT TO THE 'FLORA YECTENSIS.' 



By Alexander G. More, F.L.S., M.R.I. A. 



{Concluded from page 172.) 



*AnacJiaris Ahinastrmn, Bab.; Elodea canadensis, Rich. Ponds at 

 Barton Farm, 1860 (J. Pristo). Pond by the roadside near Lynn Farm, 

 1863. Millstream at Shide, near Newport (F. Stratton). Planted by 

 Dr. Bell Salter in a pond near the Spencer Road, Ryde, previous to 

 1850. 



Orchis ustulata, L. On Ashey Down, near the farm, 18.53 (T. Baines). 

 Near the reservoir on Ashey Down, 1863. Carisbrooke Castle (R. Tucker). 



0. incaruata, L. Rookley Wilderness, and in the Landslip near Bon- 

 church. Apparently more frequent than 0. lulifolia, L., but I cannot 

 distinguish these plants with certainty. 



Qymnadenia conopsea, R. Br. Bnnks near Steephill Farm, very rare 

 in the Underclifl' (A. .J. Hambrough). 



Habenaria bifolia, R. Br. Near Shanklin 1 (Rev. T. Sahvey). Very 

 rare in the Isle of Wight, while H. chloranlha is frequent. 



Ofjhryn mnHcifcra, Huds. Copse aijove Brading. 



Neoitia NiduH-avis, Rich. A single plant at Steephill. Barton Wood, 

 Osborne (J. Pristo). 



Epipacli's media, Fries. West end of Cowpit Cliff ^\ ood, near Shank- 

 lin ! (Rev. T. Sahvey). In the Landslip sparingly. The typical E. lati- 

 folia is, I believe, the more frequent plant, but 1 confess that I cannot 

 satisfactorily separate the two. 



* This is my Psammanthe marina (AValp. Ann. Bot. Syst. ii. 660), which, though 

 certainly referable to Sesuvium, is perhaps distinct as a species, the styles being 

 apparently always united as far as the middle. 



t I have already pointed out ''Ann. Sc. Xat. oe ser. v. 245) that 3Ir. Bentham 

 was mistaken in suppo.sing the petals of tins species to be destitute of fringe. It 

 agrees in every character with its Australian congeners. 



