Mededeelingen van "e Rijks Herbarium Leiden. UE 
No. 48. On a new Indian Urochloa 
J TH. HENRARD. 
Among the grasses in the Rijks-Herbarium I found an undeter- 
minated Panicum, received from the British Museum, collected in 
the Bombay Presidency by Mr. Youwe. This plant is very interes- 
ting as it belongs to a small group of about 18 species in general 
appearance very similar to the genus Brachiaria as accepted by 
American authors. 1) 
In the genus Brachiaria the spikelets are placed with the first 
glume towards the axis (adaxial), but in the group forming the 
genus Urochloa, the first glume is turned away from the rhachis 
(spikelets abaxial). Nearly all the species of Urochloa have a very 
obtuse apex of the fertile valve, ending in a fine mucro. 
This genus is not recognized by Hırcucock and CHASE, because 
the Panicum reptans, L. is placed by them among the true Panicum 
species. 2) Stapr however makes the combination Urochloa reptans 9), 
and although the position of the spikelets is the same as ın the 
genuine Urochloa species, the fertile valve is not rounded at the 
apex and only slightly apiculate. On the other hand there are 
among true Brachiaria’s some species with a very obtuse valve and 
a long fine mucro, e. g. the very curious Brachiaria ophryodes, CHASE 
(Mexico: Monterrey, State of Nueva Leon, type collection, HITCHCOCK 
no. 5538, Amer. Gr. Nat. Herb. no. 401!) and the Brachiaria Meziana, 
Hrronc. (Mexico: BounaEAu no. 222!, 4391). Thus the character of 
the obtuse mucronated valve is not in correlation with the position 
lige e REN S 
1) AGNES CHasE, The North American species of Brachiaria in Conte Si 
Herb. XXII (1920) p. 381, i " 
2) HrrcHcock and CHasE, The North American species of Panicum in Contr. 
U. S. Nat. Herb. XV (1910) p. 361. 
3) 0. STAPF in PRAIN, Flora of tropical Africa IX (1920) D 6011. 
