Keys in Flora of Bhutan: 1. Leaves deciduous, broadly elliptic to obovate; flowers in lax terminal panicles . . . . .. 1. S. paniculata + Leaves evergreen, usually narrowly elliptic; flowers in simple or branched axillary racemes or spikes, or axillary fascicles . . . . .. 2 2. Midrib prominent on upper leaf […]
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