258 The Philippine Journal of Science 1914 
e tuberculis distinctis orientibus instructa, intus plurinervis; 
gluma secunda paullo brevior, elliptico-ovata, chartacea, margi- 
nibus ciliolatis ; lemma sterile vacuum, hyalinum, gluma secunda 
circa aequans; lemma fertile et palea hyalina quam lemma 
sterile breviora. Spiculae pedicellatae ad squamas duas mem- 
branaceas circa 0.5 mm longis reductae. 
Only collection seen, near Taytay, northern Palawan, Philippine Islands, 
May 15-31, 1913, G. Ledesma. Type in herb. Hubbard, duplicate type 
deposited in the Gray Herbarium, in the United States National Herbarium, 
in the Herbarium of the Bureau of Science, and in the Herbarium of Dr. 
Edward Hackel. 
Rottboellia triflora belongs in the subgenus Coelorhachis of Hackel’s 
treatment of Rottboellia 1 and is allied to R. glandulosa Trin. but is very 
distinct in the 3-spikeleted internodes of the lower portion of the racemes. 
Doctor Hackel in his letter to me, in regard to the position of this species 
in the genus, says: “The new species seems to have the same relation to 
the older ones (especially Rottboellia glandulosa ) , as has Ophiurus laevis 
Benth. (0. perforatus Trin.) to O. monostachyus Presl, and others. In 
Ophiurus laevis the disposition of the spikelets is, at least in the lower 
part of the spike, the same as in your new Rottboellia, and the only differ- 
ence consists in the pedicels of the rudimentary spikelets being adnate to 
the rachis. Ratzeburgia differs from your new Rottboellia chiefly in the 
thin rachis of the compressed spike. Your new species points to the view 
that the differences between Rottboellia, Ophiurus, and Ratzeburgia are of 
less weight than we thought.” 
DC. Monog. Phan. 6 (1889) 278-313. 
