224 BULLKTIN DE LHCRBIER BOISSIER (2"'e SÉU.)- (8) 



50. Pycreus sulcinux C. B. Clarke in Hook. f. FI. Brit. Ind. VI, p. 593 

 (Sept. 1893). — F K G. III. p. 82. 



51. Cyperus dilutus V^ahl. — F K G. III, p. 83 (« Mariscus microcephalus »). 

 An alleged earlier name for this species is Cyperus compactus Reiz, Obs. Bot. 

 V, p. 10 (1789); but, as Mr. G. B. Glarke informs me, it is a name of uncer- 

 tain application, and is best dropped. Mr. Glarke only quoles tbe name « fide 

 auctorum », and further points out tliat it is evidently based on a fragment of a 

 spécimen, and not on tbe examinatiou of a whole plant, which bas niany heads, 

 and not a solitary smail one. 



52. C3rperus exaltatus Retz var. digynus (Bœckl.) Williams var. nov. — 

 Banks of R. Mekong, a form witb palisb scales (Ivuntze Rev, Gen. Plant., 

 p. 748 (1891), <( Cyperus alopecuroides (non Roltb.) Roxb. Hort. Bengla., var. 

 digynus Bœckl., forma pallida »). 



53. Cyperus haspan L. — F K G. III, p. 82. A pest in rice-fields. 



54. Cyperus monocephalus F. Muell. — Bangkok (Scbomburgk, n. 327). 

 F K G. III, p. 80 (« Kyllinga monocephala »). 



Pax, in Engler and Prantl's Natiirl. Pflanzenf., sinks Pycreus and Mariscus in 

 Cyperus. Mr. G. B. Glarke, white admitting tbe feasibility of sinking Mariscus, 

 tbinks tbat Pycreus certainly should be kept up as a distinct genus, and bas 

 suggested to me tbat if Mariscus goes, tben Kyllinga sbould also be sunk in 

 Cyperus. ïbe suggestion is bere carried out. Kyllinga monocephala bas aiready 

 been listed under Cyperus by F. V. Mueller, wbose authority tberefore now 

 stands in tbe transfer of tbe species to tbe otber genus. Anotber name will tben 

 be required for Cyperus monocephalus Baker, in Journ. Linn. Soc. XXII, p. 531, 

 a Madagascar plant described 13 years afterwards, and for wbicb on account of 

 ils numerous spikelets I propose tbe name of Cyperus spiculosus, a name for- 

 merly applied by Reicbenbacb to a garden form of Cyperus congesius Vahl. 

 « Once a synonym, always a synonym » can never be accepted as a workiug 

 rule in a large genus like Cyperus, as it would preclude tbe use of a number of 

 suilable and cbaracteristic specific names. 



55. Cyperus pennatus Lamk. (1791). — F K G. III, p. 82 (« Mariscus 

 albescens Gaudich. » [1826]). 



In transferring Mariscus albescens to Cyperus, tbere seems little doubt about 

 tbe above being tbe correct name under tbe genus. 



56. Fuirena glomerata Lamk. — F K G. III, p. 90. A rice-field weed. 



57. Heleocharis capitata Brown. — F K G. III, p. 84. 



58. Heleocharis chaetaria Rœm. et Scbull. — F K G. III, p. 84. 



59. Heleocharis equisetina J. et G. Presl. — F K G. III, p. 85. 



60. Fimbristylis cymosa Brown. — F K G. III, p. 89; et var. subcapitata 

 G. B. Glarke, in F K G. III, p. 90. 



61. Fimbristylis diphylla Valil. ~ F K G. III, p. 85. 



62. Fimbristylis ferruginea Vabl. — F K G. III, p. 88. 



