Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Trichocentrum

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1 Leaves to 40 cm long, 7 cm wide; flowers whitish with lavender blotches; the width across middle lobe of labellum equaling or shorter than width of labellum across lateral lobes
1 Leaves to 60 cm long, 12 cm wide; flowers brown to yellow-green with reddish-brown blotches; the width across the middle lobe of labellum exceeding total width of lateral lobes