224 



NEW EAST AFKICAN CYPERACE^. 



By C. B. Clarke, F.R.S. 



I HAVE provided Dr. Gregory with a list of the CyperacecB collected 

 by him in his Keuia Expedition. Among them are seven which I 

 have not been able to refer to any known species ; of these diagnoses 

 follow. JunceUus jiihmtus has not the nut flattened on its anterior 

 face, and is perhaps allied to the very small group of African 

 Cyperus which have the three branches of the style reduced, very 

 small, or obsolete. Mariscus jisilostachys differs from nearly the 

 whole of that large genus in being minutely hairy all over. M. 

 f/lohifer may be not distinct from M. remotus, but the flowers are 

 quite young, and I have not here M. remotus for comparison. 



Pycreus debilissimus, sp. n. Glabra, debilissima. Radices 

 fibrosfe, tenues. Culmi 8-14 cm. longi, tenuissimi. Folia pauca, 

 omnia sub-basalia, cum culmo subaequilonga, setacea, flaccida, 

 debilissima; vaginae membranacese, scarioso-bruneje. BractefB 2, 

 cum foliis cousimiles, ima 6 cm. longa. Caput 1, 8-stachyum. 

 Spicula3 sessiles, compressfe, castaneae, 10 mm. longse, 2 mm. latffi, 

 20-florae ; rhachilla persistens, subexalata. Glumae arete imbn- 

 catfe, duriusculte, naviculares vix apiculatje. Stylus brevis ; rami 

 2, lineares, oblique in piano per rhachillam spiculae transeunte. 

 Nux lateraliter compressa, parvula, obovoidea, nigro-brunea, cum 

 ■| parte glumjB fequilonga ; cellule superficiales longitudinaliter 

 oblongffi, magnfe, irregulariter sitas (nux non transversim undulato- 

 lineolata). Sp. P. elegantulo affinis. 



Hab. Tana. 



Juncellus minutus, sp. n. Glabra. Culmi 2-4 cm. longi, 

 leves, trigoui, basi minute bulboso-incrassati, radicibus lentis. 

 Folia omnia basalia, pauca, 2-3 cm. longa, 1 mm. lata, debilia, 

 viridia. Bractere 2, cum foliis consimiles, ima 25 mm. longa, sub- 

 erecta. Caput 1, 8-stachyum. Spicule 4 mm. longfe, 1 mm. latae, 

 compressas, rubro-maculatae, 6-nucigeras. Glumae arete imbricate, 

 naviculares, carina viridi in mucronem fere excurrente ; rhachilla 

 subquadrata, alls angustis hyalinis, omnino Juncelli. Stamen 1 

 (saltem interdum) ; antherte ellipticse, parvuhe, muticfe. Stylus 

 longus, pertenuis, apice breviter 2-1-fidus. Nux perminuta, ob- 

 ovoidea fere subpyriformis, nigra, planoconvexa ; cellulae super- 

 ficiales subquadratse, inflatae, lucido). Species Cypero sewitri/ido 

 Schrader forsan alfinis. Cf. prfesertim Schweinfurth n. 120, in 

 Abyssinia (Kohaito, alt. 2650 metr.) lectnm. 



Hab. Ongalea Montes ; alt. 800 metr. 



Mariscus concinnus, sp. n. Glabra. Culmus 25 em. longus, 

 tenuis, apice trigonus levis, basi vix (ob vaginas) incrassatus. 

 Folia omnia basalia, usque ad 14 cm. longa, 3 mm. lata, debilia, 

 flexuosa ; vaginre vix scarios^e ueque inflatae. Bracteae 3-4, cum 

 foliis consimiles, ima 5 cm. longa. Umbella simplex ; radii 3-1, 

 usque ad 15 mm. longi. Spica e 2-4 spiculis laxius spicata, basi 

 non bracteata. Spiculae 10 mm. longae, 2 mm. in diam., teretes, 



