22. Vanroyenella Novelo & C.T. Philbrick

Vanroyenella Novelo & Philbrick, Syst. Bot. 18: 64 (1993).

Like Marathrum but leaf blades plumose with filamentous segments arising directly from rachis,  ultimate divisions forked and hair-like; flowers in fascicles of up to 13; tepals 3 or 4; stamens 2 (3), confined to one side of  flower; stamen filaments filiform, persistent, indurate, remaining attached to ribs of capsule after anthesis; capsule valves with 3 ribs; seeds up to 1000 or more. One sp., V. plumosa Novelo & Philbrick, Jalisco & Oaxaca, Mexico.

Vanroyenella plumosa. A. Fragment of vegetative shoot (1 cm). B Filamentous leaf segments (1 mm). C. Flower (0.5 mm). D. Capsule with persistent filaments (0.5 mm).

Cook & Rutishauser 2007