180 



1.2 nun. long, tlic hairs 2 mm. long or less. Awn of the flowering glume 

 inserted at about the lower fourth, 7 mm. long, scabrid, somewhat gen- 

 iculate 1 and twisted below the geniculation. 



LUZON, Province of Benguet. Mount Tonglon (4839 Merrill) November 12, 

 1905. In dry open soils at the summit of tlio mountain at about 2,250 m. 

 Hackel states that this species is closely related only to Calamagrostis nardifolia 

 (Griseb.) Hack. (Agroslis nardifolia Griseb.) of the Argentine Andes. A New 

 Zealand species Calamagrostis (Deyeuxia) setifolia has similar leaves but quite 

 other inflorescence and spikelets. 



Hackel lias suggested the name Calamagrostis filifolia forma cleistogama for 

 specimens No. 4537 and 4715 Merrill, the former from Mount Data. Lepanto. 

 and the latter from Pauai, Benguet, the specimens differing from typical ('. filifolia 

 In having the 0.5 mm. long anthers persisting witli the ripening fruit within 

 the closed glumes and palea and lodicules 0.7 mm. long. 



If we exclude Deyeuaia quadriseta Benth., credited to tlie Philippines by 

 F.-Villar, and undoubtedly not a Philippine plant, the identification apparently 

 having been erroneous, then the above species is the first one of the genus to be 

 reported from the Philippines, the genus in general being a northern one, or at 

 least characteristic of the more temperate regions. 



POA Linn. 

 Poa luzoniensis Merrill sp. now 



An erect perennial grass from long rootstocks. not at all tufted. 

 Culms .'50 to -40 cm. high, glabrous, smooth, geniculate below; nodes 

 glabrous; sheaths equaling or shorter than the intcrnodes, rather loose. 

 the lower ones dry and brown; ligule short, truncate, cartilaginous; 

 blades 8 to 14 cm. long, 1.5 to 2.5 mm. wide, flat, thin, glabrous, some- 

 what acuminate. Panicles lax, comparatively few flowered, slightly ex- 

 serted. about !) cm. long, the branches few, whorled, ascending or 

 spread ing-ascending, the longer ones 3 cm. or less, filiform, each bearing 

 few spikelets. Spikelets about ,'5.5 mm. long, green or purplish, the 

 pedicels 2 mm. long or less; first glume lanceolate, acuminate, about 

 2.1 mm. long, 1 -nerved, slightly scabrous on the keel; second glume 

 similar to the first but nearly 'A mm. long and 3-nerved. Flowering 

 glumes 3, ovate, acute. 5-nerved, about 3 mm. long, slightly silky hairy 

 on the keel below, otherwise glabrous, the paleas narrow, hyaline, about 

 2.5 mm. long, the rachilla glabrous. 



Luzon, Province of Benguet, Pauai (4712 Merrill) November 8, 1905. 



This species was found in a large, open, natural meadow along the borders of 

 a cold stream at an altitude of about 2,100 m., being very rare in the locality, 

 and associated with Calamagrostis, Brachypodium, Bromus, Anthowanthum luzo- 

 jiinisc. Ayroslis elmeri, Ranunculus sp., Viola sp.. various species of Carcx and 

 other northern types. Single, scattered specimens only were found, the rhizomes 

 creeping rather extensively and generally rooting at the lower nodes. This 

 decidedly northern type is an interesting addition to the known boreal (dement 

 in the flora of northern Luzon, being the first native species of the genus to 

 be reported from the Philippines. Dr. Hackel, to whom specimens were sent. 

 states that it may be most closely related to the widely distributed Poa pratensis 

 Linn. 



