66 MR. G. BENTHAM ON GRAMINEE. 
include S. Nareya (Eriochrysis Nareya, Nees) and S. longifolia, 
Munro (Eriochrysis longifolia, Munro), from East India, S. pallida 
(Eriochrysis pallida, Munro) from South Africa, and S. cayennense, 
the typical Eriochrysis of Beauvois, which last differs only in the 
very dense almost spike-like panicle. 
4. EnrawTHUS, Mich. (Ripidium, Trin.), would be a more satis- 
factory genus if it could be restricted to the two old species 
E. saccharoides, Mich., from North America, and ZE. Ravenne, 
Beauv., from the Old World; but besides the above-mentioned 
connexion with Saccharum, there are several South-American 
species which run very closely into Pollinia. On the whole, it 
seems best to consider Hvrianthus as an intermediate genus 
between Saccharum and Pollinia, having the inflorescence of the 
former, but the flowering-glume more developed into a point or 
awn almost as in Pollinia. It would then consist of about twelve 
species, amongst which Z. stricta, Nees, from North America, has 
no hairs on the rhachilla, but only a short pubescence on the 
glumes. 
5. SPODIOPOGON, Trin. differs from Pollinia, as Chrysopogon 
does from Andropogon, chiefly in inflorescence. The short 
branches of the panicle bear three spikelets, one sessile between 
two pedicellate, and occasionally there is a pair of spikelets below 
the three terminal ones ; but the branches never form the regular 
spikes of Pollinia. Besides the original S. sibiricus, Trin., we 
have two additional species, Š. pogonanthus, Boiss., from the 
Levant, and S. albidus (Andropogon albidus, Wall. Cat. Herb. Ind. 
n. 8821), from East India. The generic name has also been often 
misapplied. S. angustifolius, Trin., is a Pollinia; some others of 
his species with 2-flowered spikelets belong to Ischemum. Four- 
nier’s Mexican Spodiopogons are evidently species of Erianthus ; 
his S. foliata indeed (Bourgeau, n. 2979) appears to me to be 
identical with the original E. saccharoides, Mich. 
6. Post, Trin., is now a genus of about twenty-five tropical 
or subtropical Old- World species, with the inflorescence of the sec- 
tion Gymnandropogon of Andropogon, and the homogamous spike- 
lets of Saccharum and Erianthus ; the spikelets are in pairs along 
the simple branches of the panicle; these branches either few, 
almost digitate at the end of the peduncle, or more numerous and 
scattered along the main rhachis. The genus is divisible into 
two very natural sections :—1. Eulalia, with the spikes and pedicels 
covered with long silky or rufous hairs as in Zrianthus, includes 
