333 



(1) Arthraxon microphyllus (Trin.) Hoolist. in Flora 39 (185(5) ISO; Hack, 

 in DC. Mon(),n-. I'lian. 6 (1889) 351; Philip, .lourn. Sci. 1 (1!)00) Suppl. 2{)5 ; 

 Hook, f Fl. Brit. ind. 7 (18!)7) 147. Aiidtojioi/on inicrophjiUus Trin. ^Nlein. Acad. 

 St. Petersb. VI. 2 (1833) 275. 



Luzon, District of Lepanto, jNIount Data (4485 Merrill) November, 1!)()5: 

 Province of Bcnguet. Bagnio to Anibnklao (43()3 Merrill) October. 1905; Snyoc 

 to Pauai (4710 Merrill) November. 1005. 



British India to Ceylon and Toid<in. 



(2) Arthraxon ciliaris Beanv. Agrost. (1S12) 111. t. 11. f. G. subsp. langs- 

 dorffii (Trin.) Hack, in DC. Monog. Phan. 6 (1889) 354; Philip. Journ. Sci. 

 1 (190G) Suppl. 265; Rendle in Forbes & Hemsl Journ. Linn. Soc. Bot. 36 (1004) 

 360; Pilger in Perk. Frag. Fl. Philip. (1904) 130. Arthraxon. ciliare F.-Vill. 

 Nov. App. (1883) 315. 



Luzon, Province of Nueva Viscaya, Quiangan (102 Merrill) June, 1902: Dis- 

 trict of Lepanto, Balili (4628 Merrill) November, 1905. Mindanao, Lake Lanao, 

 Camp Keithley (100 Clemens) January. 1906. 



China and Japan. 



Subsp. nudus (Nees) Hack, in DC. Monog. Phan. 6 (1889) 356; Philip. 

 Journ. Sci. 1 (1006) Suppl. 266. 



Luzon, Province of Benguet, Kubayan (4427 Merrill) October, 1005. 



British India. 



Subsp. quart! nianus (A. Pvich.) Hack, in DC. Monog. Phan. 6 (1889) 365; 

 Philip. Journ. Sci. 1 (1906) Suppl. 266. 



Luzon, Province of Benguet (4272, 4677, 4704 Merrill) October-November, 

 1905. 



(19) ANDROPOGON Linn. 



Racemes solitary or in pairs, digitate or jianicled. Rliachis and callus 

 of the first empty ghmie usnally hairy. Spikelets usually narrow, the 

 pedicellate ones staminate, empty or reduced to the pedicel, its flowering 

 glume awnless, but the first glume occasionally awned. 



A polymorphous genus of about 200 species in all tropical and temperate 

 regions; 18 in the Philippines. 



1. SessUe spikelets of the lowest pairs in each raceme Hke those 

 above as regards sex, form, and awns. (Series A. Isozygi.) 

 2. Racemes slender, solitary, usually smooth, terminal, 

 the thickened joints of the rhachis with a cup or 

 tooth-like appendage at the apex. Flowering glume 

 often cleft nearly to the base, awned from the 

 cleft ; second empty glume awnless. Slender 

 grasses. (Subgenus Schizachyrium. ) 



3. Leaves obtuse ; 1 to 3 cm. long : articulations 

 and pedicels glabrous ; awn of the sessile 



spikelet 8 to 12 mm. long -.-- ID A. hrcrifolius 



3. Leaves acute, 4 to 6 cm. long; pedicels fre- 

 quently ciliate ; awn of the sessile spikelet 16 



to 18 cm. long (2) A. fragiUs 



2. Like subgenus Schizachyrium, but the spikelets 

 laterally compressed, the second empty glume 

 awned, the flowering glume slightly notched at the 

 apex. (Subgenus Diectomis.) 



3. A rather coarse erect grass, the awns of the 



sessile spikelets 3 to 4 cm. long (3) .4. fn.itigiatHf! 



