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FNA | Family List | FNA Vol. 28 | Orthotrichaceae | Zygodon

1. Zygodon conoideus (Dickson) Hooker & Taylor, Muscol. Brit. 71. 1818.

Bryum conoideum Dickson, Fasc. Pl. Crypt. Brit. 4: 9, plate 11, fig. 2. 1801

Plants to 0.7 cm. Stem leaves loosely erect and not contorted when dry, spreading to ± recurved when moist, oblong-lanceolate, 1-1.7 mm; margins entire; apex broadly acute, apiculus abrupt; costa ending near apex, abaxial surface covered by cells distally; basal laminal cells subquadrate to short-rectangular; distal cells 9-14 µm, papillae 2-4 per cell, walls somewhat thick. Specialized asexual reproduction by cylindric to fusiform gemmae, longitudinal walls absent. Sexual condition dioicous. Sporophytes unknown.

Tree trunks, dead branches; low elevations; N.S.; Mass.; Europe.

Zygodon conoideus is distinguished from Z. viridissimus by its wider, oblong-lanceolate leaves, larger laminal cells, and gemmae that have 4-7 horizontal, but no longitudinal, septa. The apiculus usually has a long, clear terminal cell.


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