GRAMINEAE 85 



compressed, shining, the second smaller, membranaceous, linear-oblong, 

 obtuse. Palea hyaline, short, or none. Grain free within the glumes. (In 

 honor of C. de Zoys,) 

 A monotypic genus. 



1. Z. matrella (L.) Merr. (Z. pungens WiM.) . 



A low, gregarious grass from rigid, wiry rootstocks, the branches root- 

 ing, sending up short, rather stiff, leafy, flowering branches 10 to 40 cm 

 high. Leaves mostly spreading, 2 to 7 cm long, 2 to 4 mm wide. Spikes 

 slender, solitary, purplish or green, 2 to 4 cm long. Spikelets about 3 

 mm long. 



In open grass lands especially near the sea, fl. all the year; throughout 

 the Philippines near the sea. India to Mauritius, China, Malaya, Polynesia, 

 and Australia. 



18. AFt UN DIN ELLA Raddi 



Erect, usually unbranched, annual or perennial, slender or rather coarse 

 grasses with flat leaves. Panicles ample, lax or contracted, the spikelets 

 not jointed on the pedicels, usually 1-flowered. Glumes 4, thin, the first 

 ovate, acute or acuminate, much or little shorter than the second which is 

 slenderly awned, the third about as long as the first and with a. palea or a 

 male flower, or neuter, the fourth much the smallest, with a perfect flower, 

 awnless or with a slender terminal awn. -(Diminutive of Latin "arundo," 

 a reed.) 



Species about 30, in most tropical countries, about 5 in the Philippines. 



1. A. agrostoides Trin. 



An erect, tufted, glabrous grass 15 to 45 cm high. Leaves lanceolate, 

 acuminate, numerous, 8 to 20 cm long, 6 to 10 mm wide. Panicles exserted, 

 ovoid or oblong-ovoid, when young open, soon becoming contracted, green, 

 10 to 20 cm long, the branches whorled, slender, mostly about 5 cm long. 

 Spikelets pedicelled, glabrous, green, lanceolate, acuminate, the flrst glume 

 lanceolate, acuminate, 3-nerved, 2.5 mm long, the second similar but 3 mm 

 long, 5-nerved, and more slenderly acuminate, the third about 2 mm long, 

 3-nerved the fourth glume about 1 mm long, hyaline, with a slender straight 

 awn 4 to 5 mm in length. 



On ledges along streams, Masambong, opposite Guadalupe, etc., fl. Dec- 

 Feb.; occasional in northern Luzon. India. 



19. ERIOCHLOA Kunth. 



Annual or perennial, erect, tufted grasses. Leaves flat. Spikelets secund 

 on the spike-like branches of a raceme or panicle, base thickened and arti- 

 culate on the thickened top of the short pedicel. Glumes 3, first and second 

 sub-equal, thin, empty, the third shorter, apiculate, hardened in fruit. 

 Grain oblong, free within the hardened glume. Very close to Paspalum, 

 but distinguished by its habit and by the thickened base of the spikelet. 

 (Greek "wool" and "grass" in allusion to the hairy inflorescence.) 



Species few, tropical and subtemperate, one in the Philippines. 



1. E. ramosa (Retz.) O. Kuntze {E. polyatachya HBK.). 



An erect, somewhat tufted, rather slender grass 0.5 to 1.3 m high, gla- 

 brous except the panicles. Leaves narrowly lanceolate, acuminate, 10 to 

 20 cm long, 4 to 8 mm wide. Panicles exserted, 8 to 12 cm long, formed 

 of racemosely arranged branches, usually secund, often nodding. Spikelets 



