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Nuyisia Vol.7, No.2 (1990) 
50a. Stems flattened, nut smooth but with deeply sculptured cells F. micans 
b. Stems terete or angled, mature nuts tuberculate or ridged 5 1 
51a. Nut with 7-10 coarse transverse ridges F. ammobia 
b. Nut without transverse ridges 52 
52a. Style 3-4 mm long, glumes 4-5 mm long F. sp. F 
b. Style less than 3 mm long, glumes less than 3.5 mm long 53 
53a. Fertile glumes sharply acute or awned, 2-3 mm long 54 
b. Fertile glumes obtuse, muticate, generally less than 2.6 mm long 56 
54a. Glumes ciliate on upper margin, nut epidermal cells transversely lineolate F. sp. F 
b. Glumes glabrous, nut cells not transversely lineolate 55 
55a. Mature nut white or stramineous, less than 0.5 mm wide 1. F. arnhemenis 
b. Mature nut dark brown, greater than 0.5 mm wide F. subaristata 
56a. Glumes and spikelets obtuse, stems nerved F. rara 
b. Glumes and spikelets acute, stems deeply grooved F. phaeoleuca 
57a. Plants less than 20 cm tall, 
inflorescence simple (spikelets less than 10) 8. F . rupestris 
b. Plants greater than 20 cm tall, inflorescence compound 
(spikelets more than 10) 58 
58a. Glumes less than 2.6 mm long, style less than 2 mm long 59 
b. Glumes greater than 2.6 mm long, 
style generally greater than 2 mm long (if less then glume awned) 66 
59a. Nut maturing purplish-black, glume margins hairy, style base hairy 60 
b. Mature nuts white or dark brown, other characters not combined 61 
60a. Glumes acute, style twisted at maturity, glumes subdistichous F.furva 
b. Glumes with 2 obtuse lobes, style not twisted, 
glumes spiral F. macassarcnsis 
61a. Glumes and spikelets obtuse, spikelets 2.5 mm wide F. rara 
b. Glumes and spikelets acute, 
spikelets generally less than 2.5 mm wide 62 
62a. Small annual, stamens 1 (2), glumes less than 1.6 mm long F. milacea 
b. Perrcnials, stamens 3 (2), glumes generally greater than 1.6 mm long 63 
63a. Rhizomatous or stoloniferous perennials, leaves narrow 
(subterete) with long hairs on lower margins 64 
b. Tufted perennials, leaves flattened or inrolled, 
shortly scabrid on lower margins 65 
