Nuytsia Vol.7, No.2 (1990) 
b. Glumes less than 4 mm long, style less than 2 mm long, 
anthers less than 1 mm long F . schoenoides 
100a. S pikelets 1-4 per inflorescence, leaves setaceous, glabrous F . polytrichoides 
b. Spikelets 5 or more per inflorescence, leaves flat with scabrid margins F. sp. K 
101a. Small annuals, style less than 1 mm long, 
glumes less than 2 mm long, stamen 1 (if style and/or glume longer, 
then style base with long hairs covering nut) 102 
b. Perennials or large annuals, style either greater than 1 mm long 
or glumes greater than 2 mm long, stamens 1-3 106 
102a. Fertile glumes obtuse, involucral bracts much shorter than inflorescence 103 
b. Fertile glumes acute or mucronate, bracts longer than inflorescence 104 
103a. Inflorescence a single terminal spikelct, 
upper glume fringes ciliate, style glabrous F. distincta 
b. Inflorescence with 1-12 spikelets, glumes glabrous, 
style minutely ciliate F. stenostachya 
104a. Style glabrous, nut ornamented with a row of clavate appendages F. dipsacea 
b. Style hairy at least at base, nut smooth 105 
105a. Base of style with long hairs encompassing nut F. velata 
b. Base of style with short hairs F. aestivalis 
106a. Annual 25 cm or more tall, with broad spongy 
stems (1) 2.5 mm wide, style glabrous F. dolera 
b. Perennials or annuals less than 25 cm tall, stems stiff, style usually hairy 107 
107a. Annual with single terminal spikelct, 
fertile glumes with an awn about 0.5 mm long F. adjuncia 
b. Perennials with 1- numerous spikelets, fertile glumes not awned 108 
108a. Style base and glume surface ciliate, leaves silky hairy on underside F. sericea 
b. Style base and glume surface glabrous, 
leaves (if present) glabrous or nearly so 109 
109a. Nut less than 0.5 mm long, black, style narrow, 
ciliate whole length, spikelets numerous F. caespitosa 
b. Nut greater than 0.5 mm long, white or brown, other characters not united 1 10 
1 10a. Plants with numerous generally Hat leaves, 
glumes less than twice as long as broad, 
spikelets predominately greater than 6 per inflorescence 1 1 1 
b. Plants leafless or with few setaceous leaves, 
glumes generally twice as long as broad, 
spikelets predominately 1-6 per inflorescence 1 12 
111a. Nut trabeculate (lattice-like), base of stem clothed with fibrous 
remains of old leaf sheaths; desert plant F. dichotoma (desert form) 
