138 XXVIII. ORAMINEyE. [^EllOUUrilS 



at which the narrow edges are inflexed ; gl. III. hyalhie, elliptico- 

 laiaceolate with 2 marginal nerves and sparsely ciliolate edges, 2 

 lines long; fertile glume similar but 3-nerved and only l.V line 

 long, enclosing an epaleate $ flower. Pedicel of primary spikelet 

 1 ^ line long, glabrescent, spikelet 2 lines long, obliquely lanceolate, 

 similar to the sessile but the glumes are about 1-th smaller, and 

 never seem to contain a flower. 



A striking plant with the habit of E. tripsacoides Humb. but 

 recalling in its almost glabrous spike E. tristis Hackel from 

 Madagascar, wliich however is a much smaller plant. 



PuNOo Andongo. — Caadumba : March 1857. No. 2711. 



5. ARTHRAXON Beauv. ; Benth. & Hook.f .Gen. PI. iii. p. 1 1 28. 



1. A. ciliaris Beauv. Agrost. p. Ill (1812); Hack. Mon. 

 Androp. p. 354 ; Durand t Schinz, Consp. Fl. Afr. v. p. 703. 



Leaves 1 to 1] in. long, from a base of about 3 lines broad, 

 sparsely tubei'culate at the base, surface otherwise almost glabrous. 

 Spikes 1^ to 1^^ in. long, sessile spikelet -i length of the glabrous 

 rhachis-joint, lanceolate, 2 lines long,i veins hirsutulous, awn a 

 little shorter ; second spikelet represented by a short punctum or 

 obsolete. 



Approaches nearest to Hackel's var. a (jenumus (China and 

 Japan), but the subspecies and varieties suggested by Hackel 

 are not very satisfactory ; the presence or absence of hairs on the 

 rhachis seems pushed too far as a subspecific character. 



GoLUNGO Alto. — Perennial, prostrate, culms 3 to G ft., rooting at 

 the nodes, new foliaceous and flowering branches ascending-erect. 

 Flowers monoecious, the male occupying the lower, the female the 

 terminal spikelets. Habit of Ojuaihin. Growing in thick masses, 

 forming marshy meadows on the banks of the river Casaballa. In 

 leaf Sept. 1855 ; fl. and fr. May 185G. No. 7214. 



G. RHYTACHNE Desv.; Benth. <t Hook. f. Gen. PL iii. p. 109G. 



1. R. benguellensis Eendle sp. nov. 



Cpespitose ; culms erect, wiry, unbranched, ending in the 

 solitary spikelike inflorescence ; leaves rigid, convolute, flagelli- 

 form, with a narrow cylindrical sheath and tapering to a setiform 

 apex, glabrous except for a tuft of short white hairs at the 

 mouth of the sheath; ligule membranous, very short and truncate; 

 spike slender, glabrous ; rhachis-joint slightly exceeding the sessile 

 spikelet, clavate, hollow, plane of separation straight, small \ 

 pedicelled flower represented by the linear pedicel bearing a 

 minute glumelike appendage, the whole equal in length to the 

 rhachis-joint ; sessile spikelet bluntly ovate, callus merely a line 

 separated from the outer glume by a broader furrow : outer 

 glume generally patent, hai-d with shallowly convex back and 

 very narrow incurved edges, inconspicuously 7-nerved, deeply 

 transversely muricate, markings decreasing upwards and absent 

 below the generally minutely biapiculate apex; gl. II. equal 

 to gl. I., papery, transparent, 3-nerved, scaphoid with shortly 



