Australian Tropical Ferns and Lycophytes - Online edition
6.2.9 Stipe hair location/costa
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![](../../images/features/6_2.9_stipe_hair_locationcosta/thumbs/char_6_2_9_costa_sml.jpg)
Hairs present on the midrib region of the leaflets, either on the upper (adaxial) or lower (abaxial) surface.
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