Observation 134086: Sticta fuliginosa (Hoffm.) Ach.
When: 2013-05-19
Collection location: Braga, Portugal [Click for map]
No herbarium specimen

Notes: On moss covered rock.

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Sticta.
By: zaca
2013-05-21 11:02:53 PDT (-0700)

The form and color of the lobes together with the existence of cyphallae in the lower surface clearly points to the genus Sticta. There are four species of this genus in Portugal: S. canariensis (including the blue-green cyanobacterial morph, S. canariensis doufourii or S. doufourii), S. fuliginosa, S. limbata, and S. sylvatica. I think that S. doufourii can be excluded, since in this species the margins are irregularly incised with small flattened isidia or lobules. Likewise the third species in the list, S. limbata, can also be excluded, because it is usually more brownish and the isidia accumulates at the margin of lobes. From my point of view, only two species are to be considered for classification, S. fuliginosa and S. sylvatica. These are known to be very similar, both have isidiate lobes that accumulates in groups but in the case of S. fuliginosa the thalli are more single-lobed, the lobes are more roundish with the margins down-turned, which I think to be the case of these specimens. On the contrary, S. sylvatica, is multi-lobed with with reticulated ridged lobes,. margins ascending, deeply incised. So, if I had to chose, I would say S. fuliginosa.

Created: 2013-05-20 15:59:45 PDT (-0700)
Last modified: 2013-05-21 15:25:54 PDT (-0700)
Viewed: 26 times, last viewed: 2016-10-26 15:53:30 PDT (-0700)
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