50 MR. G. BENTHAM ON GRAMINEX. 
sidered as rather artificial than natural, but which I believe to be 
constant. The spikelets are nearly those of Panicum, but with 
the fruiting glume usually less hardened; the inflorescence is 
nearly that of the paspaloid Panica or of the Chloridez, but dis- 
tinguished from the former by the rhachis of the partial spikes or 
fascicles or branches of the panicle being produced beyond the 
spikelets into a more or less rigid point. From Chloridez the 
articulation of the pedicel below the spikelet always separates the 
present group. The genera are:—16. ECHINoLANA, Desv., a 
single tropical American species (E. scabra), which has quite the 
rigid single spike of some Chloride:, but the spikelets of Panice& 
intermixed with barren ones, on which account Rudge originally 
figured the plant as a Cenchrus. The loosely paniculate species 
added to Echinolena by Kunth have been rightly restored to 
Panicum by Trinius. 17. CHAM#Raruıs, Br., four Australian or 
tropical Asiatic species, fully described in my‘ Flora Australiensis.’ 
18. Spartina, Schreb. (Trachynotia, Mich., Limnetis, Pers., Pon- 
celetia, Thou., Solenachne, Steud.), five or six European, African, 
or American species, chiefly maritime, has been usually placed 
amongst Chloridee ; but the spikelets themselves containing à 
single terminal flower, and the articulation of their pedicels, are 
quite those of Panicez, not of Chloridee. 19. Xerocuroa, Br., 
three Australian species, 20. STENOTAPHRUM, Trin. (Diastem- 
anthe, Steud.), two or three tropieal maritime species, 21. PHYL- 
LORHACHIS, Trimen, a single one from Angola, and 22. THUAREA, 
Pers. (Ornithocephalochloa, Kurz), also a single maritime species 
from the shores of the Indian and South-Pacific oceans, are all 
perfectly isolated genera whose peculiarities have been well 
pointed out. Stenotaphrum is the only genus I know in the 
tribe Panicez which has the rhachis of the inflorescence articu- 
late; but this can usually not be perceived except in an advanced 
state, and has been denied by some botanists. I have already 
alluded (Journ. Linn. Soc., Bot. xvii. 196) to Kunth's mistake, 
which induced him to alter Persoon's name Thuarea (abridged 
from Thouars’s then MS. name of Microthuarea) to Thouarea. 
There remain seven very anomalous genera, but little connected 
with each other, and still less with any other genera of Graminese, 
but which have all more of the general character of Panices than 
of any other tribe. They have all been well defined and illus- 
irated, and require no more than a bare enumeration on the 
present occasion. They are:— 23. SPINIFEX, Linn., three Austra- 
