1A.	Peduncles with conspicuous bracts subtending the spike arising in the lower half, or the bracts absent; inflorescences in globose or obovoid spikes in bud	N. prostrata
1B.	Peduncles with small lanceolate bracts arising in the upper half; spike cylindrical or ellipsoid in bud	2
2A.	Fruit stipe longer than persistent calyx; fruit usually narrowing at contact with stipe; pinnae 3–6 pairs per leaf	N. pubescens
2B.	Fruit stipe usually shorter than persistent calyx; fruit usually rounded at contact at stipe; pinnae 2–3 pairs per leaf	N. microcarpa