168 
MERRILL. 
DIGITARI A Scop. 
Digitaria ciliaris (Retz.) Pers. Syn. 1 (1805) 85. 
Panicum ciliare Retz. Obs. 4 (1786) 16. 
Paspalum sanguinale var. ciliare Hook. f. FI. Brit. Ind. 7 (1897) 15. 
Luzon, Province of Ilocos Norte, Bambam, Bur. Sci. 7 661 Ramos, March, 1909 : 
Province of Rizal, Phil. PI. lift Merrill. 
Not previously reported from the Philippines; widely distributed in the Indo- 
Malayan region, extending to Polynesia. 
PANICUM Linn. 
Panicum psilopodium .Trin. Gram. Panic. (1826) 217; Hook. f. FI. Brit. 
Ind. 7 (1897) 46. 
Luzon, Province of flenguet, Baguio, Williams 1182, Elmer 6589. 
This species has previously been reported from the Philippines, but apparently 
on a wrong identification. The specimens here referred to Trinius’ species are 
considerably smaller than the typical form. 
India to Ceylon, Burma, and Malacca. 
ISACHNE R. Br. 
Isachne incrassata (Hack.) comb. nov. 
Isachne debilis Rendle var. incrassata Hack, in Philip. Journ. Sci. 1 (1906) 
Suppl. 268; Merr. 1. c. 350. 
Tufted, erect, rather stiff, the culms simple or slight] y branched, their 
lower nodes sometimes decumbent, glabrous. Leaves rigid, mostly spread- 
ing, lanceolate, sharply acuminate, 2.5 to 5 cm long, 2 to 4.5 mm wide, 
the lower surface puberulent or pubescent, the nerves obscure, the upper 
surface glabrous, minutely scabrid, the nerves distinct, close, about 20, 
margins thickened and cartilaginous, scabrid; sheaths subglabrous, or 
with few to rather many, long, white hairs, especially on the margins. 
Panicles exserted, peduncled, subpyramidal, 5 cm long or less, the 
branches spreading or ascending, slender, glabrous, 2 cm long or less, each 
branch with 8 spikelets or less, the pedicels 1 to 3.5 mm long, glabrous. 
Spikelets oblong-obovoid, usually dark-purple, sometimes pale, 1.2 to 1.5. 
mm long. Empty glumes glabrous, obscurely 5- to 7 -nerved. • First flow- 
ering glume elliptic-oblong, rounded, glabrous, sessile, inclosing a $ 
flower, the second minutely pedicelled, similar to the first but slightly 
smaller, inclosing a 2 flower. 
The type of Doctor Haekel’s variety was a rather poor specimen collected in 
Mindanao, Mount Apo, DeVore & Hoover 358. Better material has been recently 
collected in Negros, Merrill €977, Canlaon Volcano, on ledges in the Nahalin 
River, altitude about 1,260 m, and after studying this specimen I have concluded 
that the form is not closely allied to Isachne debilis Rendle, but that it is worthy 
of specific rank. 
Isachne micrantha sp. nov. 
Annua, debilis, parva, vix 10 cm alta, caulibus tenuibus, ramosis, gla- 
bris; foliis oblongis vel oblongo-lanceolatis, circiter 1 cm longis, leviter 
pilosis, vaginis quam internodia brevioribus ; paniculis depauperatis, stric- 
