CYPERACEAE 117 



In open places especially near the sea, fl. all the year; in maritime dis- 

 tricts throughout the Philippines. All warm regions. 



9.[F. barbata (Rottb.) Benth. I {BulboatyUs barbata Kunth). 



A very slender, densely tuited annual 5 to 25 cm high. Leaves num- 

 erous, filiform, much shorter than the stems, the sheaths with few to many 

 long white hairs. Spikelets few to many, brownish, about- 3 mm long, 

 crowded in dense, globose, solitary heads 3 to 7 mm in diameter, each head 

 subtended by usually two filiform leaves, one much longer than the other. 



In open, dry grass lands, railroad grades, etc., fl. Aug.-Jan. ; throughout 

 the Philippines. Warmer parts of the world. 



10. F. mlllacea (L.) Vahl. 



A tufted, slender, glabrous, rather flaccid annual 40 to 60 cm high, 

 the leaves basal, distichous, up to 40 cm in length. JJmbels decompound, 

 rather lax and diffuse, 6 to 10 cm long. Spikelets small, obtuse, globose, 

 2 to 2.5 mm long, pale or brown, mostly slenderly pedicelled, some sessile. 

 Nuts obovoid, 0.5 mm long. Style 3-fid. 



In open wet grass lands, old rice fields' etc., common, fl. throughout the 

 year; widely distributed in the Philippines. All warm countries. 



11. F. monostachya (L.) Hassk. 



A tufted glabrous plant, the stems slender, leafy at the base, 10 to 40 

 cm high. Leaves usually as long as the stem, filiform. Spikelet terminal, 

 usually solitary, ovoid, 5 to 10 mm long or more, the lower glumes dis- 

 tichous, the upper ones spiral, ovate, acuminate, 4 mm long, the keel 

 green, the sides shining, straw-colored. Nut obovoid, pale, 2 mm long, 

 tuberculate. 



In open grass lands, San Pedro Macati, fl. July-Sept. ; widely distributed 

 in the Philippines. All warm regions. 



9. SCIRPUS Linnaeus 



Tufted or scattered, glabrous. Stems slender or coarse, 3-angled or 

 terete. Spikelets many-flowered, in terminal corymbs or in lateral heads, 

 the latter sometimes reduced to single spikelets. Hypogynous bristles 

 present or wanting. Style 2- or 3-fid. Nut 3-angled or plano-convex. 

 (Latin name for the rush.) 



Species about 126 in all parts of the world, about 8 in the Philippines. 



1. Inflorescence a terminal corymb; coarse plants 1.5 to 2 m high with 



3-angled stems 1. S. grossus 



1. Inflorescence lateral, capitate or reduced to few or 1 spikelets. 



2. Stems 3-angled 2. S. mucronatus 



2. Stems terete. 



3. Heads of the lowe r part of the stems 3. S. articulatus 



3. Heads on the u pp er part of the stems. 



4. Hypogynous bristles none 4. iS. siipinus 



4. Hypogynous bristles present 5. S. erectus 



X. 8. grossus L. f. 



A very coarse, erect, glabrous perennial, the stems triangular 1.5 to 

 2 m high, the leaves basal, often half as long as the stem, 1 to 2 cm wide, 

 the leaf-like bracts subtending the inflorescence, spreading, broad, 30 to 60 

 cm long. Inflorescence corymbose, 10 to 18 cm long. Spikelets very nu- 

 merous, brown, jovoid, 5 to 8 mm long. 



