P.K. Latz, Fimbristylis 
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64a. Style ciliate at base, glumes sub-distichous, 
rhizotomous plant F. cinnomometorum 
b. Style base glabrous, glumes spiral, stoloniferous plant F. vagans 
65a. Style with relatively long conspicuous hairs for most of its length, 
nut maturing white; desert plant F. eremophila 
b. Style shortly hairy above, nut maturing dark brown; coastal plant F. cymosa 
66a. Fertile glumes with 1-1.5 mm long scabrid awns, leafy annuals F. signata 
b. Fertile glumes not awned, perennials or leafy annuals 67 
67a. Small annual with distichous basal spikelets, 
apical spikelets 1-5, glumes glabrous F. spiralis 
b. Perennials without basal spikelts, apical spikelets generally numerous, 
glumes glabrous or hairy 68 
68a. Glumes ciliate on margins, nuts maturing black 69 
b. Glumes glabrous or minutely ciliolate on margins 
(then style base glabrous), mature nuts stramineous or brown 70 
69a. Style ciliate whole length, glumes less than 3.5 mm long, 
spikelets less than 1 cm long F.furva 
b. Style ciliate at base only, glumes greater than 3.5 mm long, 
spikelets generally greater than 1 cm long F. lanceolata 
70a. Leaves flat, glabrous, style winged or ciliate above, tufted plant F.insignis 
b. Leaves subterete, hairy on lower margins, style ciliate at base, 
glabrous above, rhizotomous plant F. cinnamometorum 
71a. Spikelets capitate 70 
b. Spikelets not capitate (sometimes stunted F. neilsonii 
appearing capitate) 79 
72a. Fertile spikelets 1 (-2) flowered, style greater than 2.8 mm long, 
nut with spongy attachment on stipe 73 
b. Fertile spikelets 2-many flowered, style less than 2.3 mm long, 
nut without attachment on stipe 76 
73a. Spikelets 4-many per head, fertile glumes less than 5 mm long 74 
b. Spikelets 3 or less per head, fertile glumes greater than 5 mm long 75 
74a. Glumes spiral, style 4 mm long or more, 
spikelets all erect or suberect 5. F. composiia 
b. Glumes sub-distichous, style less than 4 mm long, 
outer spikelets becoming reflexcd at maturity F. sp. G 
75a. Glumes sub-distichous, lowest glume subequal 
to spikelets, stems hairy F. arthrostyloides 
b. Glumes spiral, lowest glume about one third of length of spikclet, 
stems cilitate or glabrous F. sp. H 
