Achrophyllum anomalum H. Robinson 1974

Achrophyllum anomalum

Achrophyllum anomalum (Schwaegr.) H. Robinson, Phytologia 29(2):118, 1974.

Racopilum anomalum Schwaegr., Sp. Musc. Suppl. 3(2):278, 1830. [Original material: Given as western North America, almost certainly in error, coll. Menzies.]

Hookeria obscura Mont., Ann. Sc. Nat. Bot. ser. 3, 4:93, 1845). Not H. obscura Wils.

Pterygophyllum obscurum [Mont.] Mitt., J. Linn. Soc., Bot. 12:398, 1869. Not P. obscurum Mitt. 1860.

Pterygophyllum crassirete Matteri, Rev. Mus. Argent. Cienc. Nat. Bern. Rivadav. 4(2):250, 1972, nom. nov. (Hookeria obscura Mont.).

Yellowish green plants becoming dark green or brownish below, with stems to 15 cm high. Leaves slightly contorted when dry, to 4 mm long, 1.8 mm wide, mostly spathulate with narrow bases, some dorsal and ventral leaves shorter and oval, apices narrowly rounded to acute; margins plane, with a number of large, sharp teeth, teeth 30–60 μm long; costa stout at base, ca. 70 μm wide, usually reaching 1/4–1/2 leaf length, often unequally forked, especially when short; cells of lamina hexagonal to rounded, becoming more elongate toward base, collenchymatous, median cells mostly 50–60 μm in diameter, upper and marginal cells mostly 30–40 μm in diameter, lower cells near costa to 80 μm long. Sporophyte unknown.

MAS A TIERRA: Pangal Falls, 205–220 m, Sk. 290, M47, Sp. M363 (all S).

Discounting the original citation, the species is known only from southern South America and Juan Fernandez.