NEW OR NOTEWORTHY PHILIPPINE PLANTS, VIII. 169 



tis, compressis, paucifloris; spiculis obovoideis, 1 ad 1.3 mm longis, glumis 

 sterilibus obscurissime 5-nerviis, subglabris, fertilibus densissime et brev- 

 iter pubescentibus. 



An annual, weak, ascending, loosely tufted plant, 10 cm or less in 

 height. Stems very slender, glabrous, branched, the lower parts decum- 

 bent and often rooting at the nodes. Leaves oblong to oblong-lanceolate, 

 about 1 cm long, often shorter, rarely 1.5 cm in length, 2 to 3,5 mm 

 wide, the base rather broad, apex acuminate, both surfaces with scattered, 

 white, rather soft hairs about 1 mm long, the nerves about 10, the margins 

 minutely scabrid; sheaths shorter than the internodes, less than 1 cm 

 long, with few, scattered, long, white hairs, especially on the margins; 

 ligule of few white hairs. Panicles strict, narrow, glabrous, less than 1 

 cm long, the branches few, 4 mm long or less, each with from 1 to 3 or 4 

 spikelets, apparently never spreading, the pedicels 1 to 2 mm long, gla- 

 brous. Spikelets obovoid, pale or slightly purplish, 1 to 1.2 mm long, 

 the empty glumes subglabrous, or at least with only a few scattered hairs 

 in the upper part, very obscurely 5-nerved or nerveless. Flowering 

 glumes densely and apparently softly pubescent with short hairs, 1 mm 

 long, the second very minutely pedicelled; paleas slightly pubescent. 



Luzon, Province of Cagayan, Moiint Cueva, For. Bur. 16837, I6S4I (type) 

 Curran, March 9, 1909, altitude about 300 m. 



A species well characterized by its small size, small leaves, contracted panicles, 

 and densely pubescent flowering glumes. It is probably more closely allied to 

 Isachne deUlis Rendle, of Formosa, than any other Philippine form at present 

 known, but seems to be distinguished by its contracted panicles, smaller leaves and 

 smaller spikelets. Among the Philippine species it is perhaps most closely allied 

 to Isachne myosotis Nees. 



Isachne vulcanica sp. nov. 



Densissime caespitosa, perennis, rigida; culmis interne ramosis, rigi- 

 dis, vix 10 cm altis; foliis rigidis, lanceolatis, acuminatis, 1 ad 2.5 cm 

 longis, 2 ad 5 mm latis, scabridis, margine incrassatis, vaginis quam 

 ' internodia longioribus; paniculis oblongis, congestis, 1 ad 2 cm longis, 

 usque ad 1 cm diametro ; spiculis atropurpureis vel rariter pallidis, densis- 

 sime dispositis, 2 mm longis; glumis exterioribus T-neiwiis, subglabris, 

 fertilibus obscure sparseque pubescentibus. 



A densely caespitose, rigid perennial, fonning tufts a few centimeters 

 in diameter or mats which are often 0.5 m in diameter. Culms rigid, 

 much branched below, not exceeding 10 cm in height, often much shorter, 

 the internodes short. Leaves rigid, lanceolate, acuminate, 1 to 2.5 cm 

 long, 2 to 5 mm wide, the margins thickened, cartilaginous, scabrid, the 

 upper surface prominently ribbed with about 18 nerves, scabrid, beneath 

 slightly hispidulous; sheaths exceeding the internodes, imbricate, with 

 scattered, long white hairs, the marginal hairs more numerous; ligule 

 of few stiff, white hairs 2 to 3 mm long. Panicles slightly or not at 

 all exserted, oblong, very dense, pur|:>le, 1 to 2 cm long, 0.5 to 1 cm in 



