REPORT ON THE BOTANY OF THE ATLANTIC ISLANDS. 85 



Cyperus polystachyus, Eottb. 



Cyperus polystachyus, Rottb., Descr. et Ic. PL, p. 39, t. 11, fig. 1 ; Benth., FI. Austr., vii. p. 261 ; 

 Boeckl. in Linnaea, xxxv. p. 477 ; Kunth, Enum., ii p. 13. 



St Helena. — Indigenous? In the watercourse in Sisters' Walk, above Major Hodson's 

 — Burchell, 8 ; near water streams in the ravines up the Central Ridge — Melliss ; without 

 locality — Hooker. 



Common in the warmer regions of both hemispheres, and extending northwards to 

 South China, the Mediterranean region, and the southern United States. 



The form collected in St Helena by Sir Joseph Hooker is almost stemless, bein°- only 

 one to two inches high ; and there are similar specimens in Kew Herbarium from Orissa, 

 collected by Mr C. B. Clarke. 



Cyperus difformis, Linn. 



Cyperus difformis, Linn., Sp. PL, ed. 2, p. 67 ; Kunth, Enum., ii. p. 38 ; Benth., Fl. Austr., vii. 

 p. 268 j Sibth, Fl. Graca, t. 46; Boeckl. in Linnaea, xxxv. p. 586. 



St Helena. — Indigenous ? Under the waterfall in Sandy Bay — Burchell, 6. 



Very widely spread in tropical and subtropical regions in the Old World. 



Burchell seems to be the only person who collected this species in St Helena. 



Cyperus rotundus, Linn. 



Cyperus rotundus, Linn., Syst. Veg., p. 98; Kunth, Enum., ii. p. 58; Benth., FL Austr., vii. p. 279; 



Boeckl. in Linneea, xxxvi. p. 283. 

 Cyperus hexastachyus, Rottb., Descr. et Ic. PL, t. 14, fig. 2. 



St Helena. — Introduced, almost certainly. "Botanic Garden" — Burchell, 11; 

 common about gardens — Melliss. 



This is the Cyperus herbivagus (errore herbicavus), Kunth, or "Nut-grass" of Melliss's 

 St Helena. Burchell calls it " Knot-grass," and adds "rarissime floret." It is one of the 

 most widely dispersed species of the genus both in temperate and tropical regions. 



Cyperus eragrostis, Vahl. 



Cyperus eragrost is, Yahl, Enum., ii. p. 322; Kunth, Enum., ii. p. 7; Benth., Fl. Austr., vii. p. 258; 

 Bosckl. in Linmea, xxxv. p. 443. 



St Helena. — Introduced ? At Major Dentaaffe's, under the waterfall in Sandy Bay — 



Burchell, 7. 



Very widely dispersed in the Old World. 



Kyllinga monocephala, Rottb. 



Kyllinga mtmocephala, Rottb., Descr. et Ic. PL, p. 13, t. 4, fig. 4; Kunth, ii. p. 129; Benth., Fl. 

 Austr., vii. p. 251 ; Boeckl. in Linnaea, xxx. p. 427. 



St Helena. — Indigenous? Iu shady pastures — Burchell, 18; abundantly in damp 



fields, in ravines, streams of water, &c. — Melliss. 



