Parmelia barrenoae Divakar, M.C. Molina & A. Crespo,

Ossowska, Emilia Anna, 2023, Notes on sorediate Parmelia species in North America with the first records of P. asiatica and P. barrenoae, Phytotaxa 619 (2), pp. 152-160 : 157-158

Parmelia barrenoae Divakar, M.C. Molina & A. Crespo, Lichenologist 37(1): 43 (2005). Fig. 3

Type:— SPAIN. ÁVILA: Sierra de Gredos , Navalpera de Tormes, Cruz del Gallo, 1300 m, on Quercus pyrenaica , 6 Sept. 2003, A. Crespo (holotype MAF 9906 ; isotypes BM, GZU, UPS) .

Lobes short and broad, overlapping, 2–7 mm wide; rhizines simple to furcate; soralia laminal, rapidly releasing soredia, leaving the exposed, light medulla. Atranorin, salazinic and consalazinic acids always present ( Divakar et al. 2005; Hodkinson et al. 2010). In addition to the mostly laminal soralia, it also differs from P. asiatica and P. sulcata , in its simple to furcate rhizines ( Table 1 ). The species seems to be common in the western USA ( Hodkinson et al. 2010), but it had not been previously reported in the central states (South Dakota and Illinois), nor from Canada.

Material examined. CANADA. Ontario: Ottawa (metro), 28 Benson Street , 45°21’N, 75°43’W, garden in back, on rotting picnic table, on picnic bench, 15 June 2005, I. M. Brodo 31715B ( CANL 120652 ). USA. South Dakota: Custer County: Cicero Peak (6.5 miles south of Custer ), on south side of peak, saxicolous, 7 July 1960, C. M. Wetmore 6991 ( MSC 23989 ); Pennington County, valley on south side near top of Harney Peak , 7 miles northeast of Custer , corticolous, 10 July 1960, C. M. Wetmore 7278 ( MSC 23944 ); Illinois: Lake County, north of Highway 20, red rocks area, above Grizzly Canyon near radio facility, about 34 miles west-southwest of the town of Williams , on twigs and branches of Quercus , 29 July 2011, C. R. Björk 23702 ( UBC-L 52130 ); Washington: Spokane, Dishman Hills county park, on ridge near the southern tip of the park, 47°39’N, 117°17’W, branches Populus tremuloides near sylvan pool in open, dry conifer forest on rocky ridge, 07 April 2011, C. R. Björk 22305 (UBC L-47428); Riverside State Park , edge of the Channeled Scablands, slopes above the “Bowl & Pitcher”, along trail below the parking lot of the main overlook, 47°42’N, 117°30’W, twigs of Amelanchier at top of basalt cliff, 03 Apr. 2011, C. R. Björk 22206 (UBC L-47419) .

Figures

FIGURE 3. Morphology of Parmelia barrenoae; A—short and broad lobes (CANL 120652); B, C—lobes with marginal and laminal soralia (B—MSC 23989, C—CANL 120652); D—lobes with simple rhizines (MSC 23989). Scale bars: A and B—0.5 mm; C and D—1 mm.