Comments
provided by eFloras
Argyrochosma microphylla is probably the most distinctive species of Argyrochosma in the flora. Chromosome studies by I. W. Knobloch et al. (1973) suggest that it may include diploid and tetraploid cytotypes.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Stem scales brown. Leaves 7--25 cm. Petiole brown, 0.75--1.5 mm diam. Blade deltate to ovate, 3--4-pinnate proximally, leathery, abaxially and adaxially glabrous; rachis flattened or shallowly grooved adaxially. Pinna costae straight to somewhat flexuous, branches rarely arising from prominent angles. Ultimate segments articulate, dark color of stalks stopping abruptly at segment bases; segment margins recurved to revolute, often concealing sporangia; veins obscure adaxially. Sporangia submarginal, borne on distal 1/3 of secondary veins, containing 64 spores. 2 n = 54.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
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Sporulating summer--fall. Rocky limestone hillsides and cliffs; 300--2100m.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Pellaea microphylla Mettenius ex Kuhn, Linnaea 36: 86. 1869; Cheilanthes parvifolia (R. M. Tryon) Mickel; Notholaena parvifolia R. M. Tryon
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
