GRAMINEAE 81 



In thickets bordering- low wet lands, fl. Sept.-Dec; widely distributed 

 in the Philippines. Marianne Islands. 



15. THEM EDA Porskal 



Tall, annual or perennial grasses, with usually long leaves. Spikes 

 many, short, crowded in panicled fascicles, the fascicles and spikes with 

 spathe-like leafy sheaths. Spikelets many, the lower ones male or neuter 

 awnless, forming a false whorl about the 1 to 3 middle perfect ones which 

 are long-awned. Perfect or female spikelets linear-oblong, the first glume 

 terete or dorsally compressed or channelled, coriaceous, the second as long, 

 the third hyaline, 1-nerved, the fourth very narrow, awned. Pedicelled 

 spikelets with 1 to 3, 1- to many-nerved glumes with often inflexed margins 

 and keeled wings. (From its Arabian name thaenied.) 



Species about 10, warm parts of the Old World, 2 or 3 in the Philippines. 



1. T. triandra Forsk. 



Erect, perennial, nearly g'labrous, 0.5 to 1.5 m high, the stems rather 

 slender, often with short branches and very leafy above. Leaves linear, 

 8 to 20 cm long, glabrous or slightly hairy. Inflorescence long or short- 

 peduncled, paniculate, the spathes longer than the spikes, the outer ones 

 up to 5 cm in .length. Lower whorled spikelets about 1 cm long, the 

 perfect one solitary, somewhat shorter. , 



In open dry grass lands near La Loma, Fort McKinley, etc., fl. May-Oct. ; 

 widely distributed in the Philippines. Tropical Africa and Asia through 

 Malaya to Australia. 



16. ANDROPOGON Linneaus 



Fine or coarse grasses of various habit. Leaves flat, base rounded or 

 cordate. Spikes solitary, in pairs, digitate, or panicled, the rachis usually 

 fragile, jointed. Spikelets usually narrow, in pairs, one sessile, female 

 or bisexual, the other pedicelled, male or neuter. Sessile spikelets 1- 

 flowered, the glumes 4, the first usually keeled, dorsally, rarely laterally 

 compressed, the second as long as the first, awned or not, the third hyaline j 

 empty, the fourth hyaline, broad or narrow, 2-fid and awned in the cleft 

 or reduced to an awn. Pedicelled spikelets various, glumes 3 or 4, the 

 fourth awnless. (Greek "man" and "beard" in allusion to the bearded 

 inflorescence of some species.) 



Species about 240, tropical, subtropical, and temperate, about 18 in the 

 Philippines. A very large and polymorphous genus of many sections or 

 subgenera, these by some botanists considered to be of generic rank. 



1. Intemodes of the spike deeply cupped at the apex. 

 2. Sessile spikelets of the lowest pairs differing from those above them, 

 in sex or in form; spikes panicled; a cultivated, coarse, tufted, per- 

 ennial grass, the leaves with a lemon-like odor when crushed. 



1. A. citratus 

 2. Sessile spikelets all alike; solitary, their peduncles enclosed in a spathe- 

 like leaf -sheath; a very slender grass... 2. A. fragilis 



1. Internodes of the spike truncate, not cupped. 

 2. Sessile spikelets of the lowest pairs different from the upper ones. 



3. Spikes digitate, densely white-villous , 3. A. aericeua 



3. Spikes solitary; spikelets long-awned 4. A. contortus 



111BB6 6 



