REPOKT ON THE BOTANY OF THE ATLANTIC ISLANDS. 69 



near Taylor's Flat, not far from Diana's Peak, at an elevation of about 2500 feet, amongst 

 ' Cabbage-trees ' and ferns. It is shrubby and rare, aud I have seen only one or two plants, 

 whereas the Sium is very abundant." This specimen has a short stunted stem with relatively 

 small crowded leaves and no flowers or fruit. 



The leaf of Sium helenianum represented iu Hooker's Icones Plantarum, t. 1032, behind 

 the inflorescence, is the only one with relatively finely toothed margins to the segments. 

 Two other specimens collected by Melliss, and regarded by him as Sium helenianum, are 

 portions of stem, about two feet long, bearing at the top leaves with as coarsely toothed 

 margins as any of those of Sium burchellii. The specimen referred to, collected by Mr 

 Chalmers, is in flower, and is so exactly like Sium helenianum, as represented in the 

 Icones Plantarum, except that the leaves are more coarsely toothed, as to be indistinguish- 

 able. Pipe fruit is still wanting of the dwarf half-shrubby form (Sium burchellii), of 

 which the only specimens bearing either flowers or young fruit are those collected by 

 Burchell himself. 



Siurn helenianum, Hook. f. (Plate XLVIII. A, B, figs. 1-4.) 



Sium helenianum, Hook. f. in Hook. Ic. PI., xi. t. 1032; Melliss, St Hel., p. 279, t. 34. 

 Angelica bracteata, Koxb. in Beatson's St Helena Tracts, p. 297 ; DC, Prodr., iv. p. 169. 



St Helena. — Endemic. High Peak and Diana's Peak — Melliss; Morris, in 1883. 



" Angelica " or " Jelico." 



This is much commoner than the form which has been distinguished as a species, but 

 which we now think may be only a form of this. See the remarks under Sium 

 burchellii. 



[Roxburgh includes the widely-spread Hydrocotyle asiatica, Linn., in his enumeration, 

 but neither Burchell nor any subsequent collector has met with it.] 



RUBIACEiE. 

 Hedyotis arborea, Roxb. 



Hedyotis arborea, Roxb. in Beatson's St Helena Tracts, p. 310; DC, Prodr., iv. p. 422; Hook, Ic. 

 PL, xi. t. 1031 ; Melliss, St Hel., p. 282, t. 35 (section of the fruit incorrect). 



St Helena. — Endemic. Diana's Peak, 2000 to 3000 feet — Hooker; Sandy Bay 

 Ridge — Burchell, 64'; without locality — Seemann, 2650 ; near Diana's Peak — Melliss. 



" Dogwood." 



Roxburo-h, who first described this tree, about 1813, records it as "a native of the 

 dark forests which decorate the misty alpine tops of the most lofty mountains in St 

 Helena." Melliss states that it takes about the fifth place among the endemic plants for 

 abundance, growing about twenty feet high on the high central ridge from Diana's Peak 

 to High Peak, at an elevation of 2700 feet. 



There are specimens iu the British Museum Herbarium collected by J. Land, M.D, 



