168 MERRILL. 



DIGITARIA Scop. 



Digitaria ciliaris (Retz.) Pers. Syn. 1 (1805) 85. 



Panictim ciliare Retz. Obs. 4 (1786) 16. 



Paspalum sanguinale var. ciliai-e Hook. f. Fl. Brit. Ind. 7 (1897) 15. 



Luzon, Province of Ilocos Norte, Bambam, Bur. Sci. 76GI llamas, ISlarcli, 190'J: 

 Province of Rizal, Phil. PI. IJp Merrill. 



Not previously reported from the Philippines; widely distributed in the Indo- 

 Malayan region, extending to Poljmesia. 



PAN I CUM Linn. 



Panicum psilopodium Trin. Gram. Panic. (1820) 217; Hook. f. Fl. Brit. 

 Ind. 7 (1897) 46. 



Luzon, Province of Benguet, Baguio, Williams 1182, Elmer 6589. 



This species has previously been reported from the Philippines, but api)arently 

 on a wrong identification. The specimens here referred to Trinius' sjx^cies are 

 considerably smaller than the typical form. 



India to Ceylon, Burma, and Malacca. 



ISACHNE R. Br. 



Isachne incrassata (Hack.) comb. nov. 



Isachne dehilis Rendle var. incrassata Hack, in Philip. Jourii. Sci. 1 (1906) 

 Suppl. 268; Merr. 1. c. 350. 



Tufted, erect, rather stiff, the culms simple or slightly 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, subpyraraidal, 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 $ flower. 



The type of Doctor Hackel's variety was a rather poor specimen collected in 

 Mindanao, Mount Apo, DeVore <£ Hoover 358. Better material has been recently 

 collected in Negios, Merrill 6977, 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 dehilis Rendlo. l)ut tliat 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, circitcr 1 cm longis, leviter 

 pilosis, vaginis (|uam internodia brcvioribus; paniculis depaujwratis, stric- 



