Psilotrichum axilliflorum Suess.

Perennial herb, erect or decumbent and rooting at the lower nodes, simple or sparingly branched, 15–50 cm.. Stem and branches terete, slender, densely furnished with crisped white hairs, often somewhat thickened at the nodes.. Leaves elliptic, 3.5–9 (–12) × 1.25–4 cm., acute to slightly acuminate at the mucronate apex, long-cuneate at the base, slightly pilose on both surfaces to moderately appressed-pilose below.. Inflorescences axillary, borne from near the base of the stem, of short few-flowered spikes ± 1–1.5 cm. wide and finally elongating to ± 2–7 cm. long, axis ± densely white pilose; peduncles 3–9 mm.; bracts lanceolate to lanceolate-ovate, ± 1.75 mm., scarious with a greenish centre, ciliate, sharply mucronate with the aristate midrib; bracteoles deltoid-ovate, ± 2 mm., green centrally with scarious margins, ciliate, mucronate with the excurrent midrib.. Flowers sessile.. Tepals greenish white, lanceolate, sharply acuminate; outer 2 tepals ± 7 mm., 5-nerved, the dorsal nerves very prominent and carinate, extending the full length of the tepal, the lamina between the ribs pale and pellucid, the 2 submarginal nerves less prominent, uniformly short-pilose, hyaline margins strongly involute; inner 2 tepals similar but slightly shorter, with no submarginal ribs and the hyaline margins densely furnished with long, ascending, multicellular white hairs; intermediate tepal with one side with a submarginal nerve and short hairs, the other side with no submarginal nerve and long-pilose; midrib and lateral nerves of all tepals confluent at the apex in an indistinct mucro.. Stamens short and slender, ± 2–3 mm.; pseudostaminodes absent, or occasionally a minute tooth present in the sinus between the filaments.. Ovary pyriform, ± 1.25 mm... Style rather slender, 1.25–1.5 mm.. Ripe capsule and seed not seen.

It is a tropical plant.