84 THE VOYAGE OF H.M.S. CHALLENGER. 



Juncus effusus, Linn. 



Juncus effusus, Linn., Sp. PL, ed. 1, p. 326 ; Melliss, St Hel., p. 342. 



St Helena. — Introduced \ Near Diana's Peak, at 2000 feet— Melliss. 



This rush is neither mentioned, nor has it been collected in the island, as far as we are 

 aware, by any other person. 



CYPERACE^J. 



Several members of this order are in the earlier collections from St Helena, and were 

 regarded as indigenous by Eoxburgh, Burchell, and other travellers ; but it is difficult to 

 determine which of them really are native and which introduced, especially the species of 

 Cyperus itself, as they are so easily introduced in ballast, &c. 



Cyperus distans, Linn. 



Cyperus distans, Linn., Suppl., p. 103; Jacq., Ic. PI. Rar., ii. t. 299; Kunth, Enum., ii. p. 93; 

 Eenth., Fl. Austr., vii. p. 277. 



St Helena. — Indigenous 1 In rivulets and wet places — Burchell, 4 ; moist places, 

 ravines, &c. — Melliss, 132; without locality — Cuming. 



Widely spread over the warmer regions of both hemispheres. 



Cyperus umbellatus, Benth. 



Cyperus umbellatus, Benth., Fl. Hongk., p. 386 ; Fl. Austr., vii. p. 289. 

 Mariscus umbellatus, Vahl, Enum., ii. p. 376 ; Kunth, Enum., ii. p. 118. j 



St Helena. — Indigenous ? In the higher pastures as well as in the dry places near 

 the coast — Burchell, 5 ; very common generally — Melliss. 



A common species in Tropical Asia and Africa, and occurring in North-east Australia. 

 It is one of the few wild plants of Ascension. 



Cyperus laevigatus, Linn. 



Cyperus lesvigatits, Linn., Mant., p. 179; Boeckl. in Linnsa, xxxv. p. 486; Eenth., FL Austr., vii. p. 



263; Rottb., Descr. ct Ic. PL, t. 16, fig. 1. 

 Cyperus mucronatus, Rottb., 1. c, p. 19, t. 8, fig. 4; Kunth, Enum., ii. p. 17. 



St Helena. — Indigenous ? In watery places, Sisters' Walk, above Major Hodson's, 

 plentifully— Burchell, 10 ; on the face of Horse Point, but rare— Melliss, 160. 



Y\ idely spread over the warmer regions of both hemispheres, especially in maritime 

 districts. 



