Phascum robustum

Autoicous. Plants gregarious, up to 3 mm tall, bulbiform, green to golden-yellow. Stems often divided at base into two to three branches. Leaves erect, slightly spreading when moist, sometimes spreading and exposing mature capsule, 9–12, broadly ovate, increasing in size inwards, concave, cymiform or slightly keeled above particularly when dry; apex acute to broadly acute; costa excurrent in a straight or slightly curved smooth or weakly denticulate arista to 700 μm long; margin entire or sometimes weakly crenulated from projecting cell ends toward apex, narrowly recurved from below midleaf almost to apex; lamina cells irregularly quadrate, rectangular, pentagonal or rhomboidal; laminal cells in apical half in larger leaves 20–30 μm long, 12–15 (–20) μm wide, 20–60 μm long in extreme apex; basal laminal cells in larger leaves 45–100 μm long, 20–30 μm wide near base, smooth or papillose. Seta 150–200 μm long. Capsule erect or inclined, globose, 500–800 μm diam., straight.