Tree ferns, large, usually with a single tall stem, with dense fibrous mass of roots at base of trunk. Fronds 1-5 m or more, most 2-pinnate-pinnatifid, not persistent and leaving distinct rounded scars on trunk, young uncurling fronds and stipe bases covered with scales; stipe stramineous or purple, smooth or with warts or spiny; scales on stipe pale or brown; cells uniform, similar in orientation, shape, size, thickness, and color, margin with teeth, setae, or cilia, apical cell dark or unpigmented. Sori orbicular, distant from margins, with or without indusia; spore surface fine, coarsely spiny, or perforate. x = 69.
Home