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Authors: LaGreca, S. & R. Dirig
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Locality: Berkshire County, Massachusetts
Abstract: This checklist is based primarily on voucher specimens from Dick Harris' survey of Bartholomew's Cobble (1981); the 2nd Tuckerman Lichen Workshop (1995); the 1998 and 2012 Andrews Forays; Phil May's survey of the summit of Mt Everett (1999); the 2010 and 2012 Berkshire BioBlitzes; and Scott LaGreca's survey of Windsor Jambs (2012). In addition, nearly half of the vouchers used for this checklist were collected by Elisabeth Lay, mostly in the 1990s, which she graciously made available to us. Redetermined vouchers from Burnham's ''Lichens of the Berkshire Hills, Massachusetts'' (1918), deposited at CUP, provide a critical, historical component to this checklist. Almost all the voucher specimens used for this checklist are housed in the following herbaria: CUP, FH, MIN, MSC, NY, SRP, and the private herbaria of Robert Dirig, Scott LaGreca, and Elisabeth Lay.

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Families: 62
Genera: 145
Species: 363 (species rank)
Total Taxa: 385 (including subsp. and var.)
Two MIN specimens of B. disciformis [865809 and 865810] were redetermined as B. erubescens by S. LaGreca in 2012.
R. C. Harris 36417 [NY], R. C. Harris 36426 [NY]
R. C. Harris s.n. [NY01526287]; R. C. Harris s.n. [NY]
R. C. Harris s.n. [NY01537492], R. C. Harris s.n. [NY01535757]; R. C. Harris s.n. [NY]
The Rosentreter voucher (no. 15110) was verified by Scott LaGreca (2012) as well as by Ted Ahti (January, 2013, in duplicate).; Roger Rosentreter 15110 [SRP] , SRP-L-0008852 [SRP]
W. R. Buck 27730A [NY]
W. R. Buck 27762 [NY]
MIN specimen 901158: Det. I. Brodo, 1962-1963; he notes: Disks C-; Apothecial margin K+ yellow, PD+ red.; Williams, M. s.n. [MIN]
W. R. Buck 27771 [NY]
R. C. Harris 36452 [NY]
R. C. Harris 36479 [NY], W. R. Buck 27758 [NY]; P. F. May 5485 [Harvard University]
W. R. Buck 27735 [NY], W. R. Buck 27786 [NY]
R. C. Harris 36419 [NY]
R. C. Harris 36537 [NY]
W. R. Buck 27705 [NY]
W. R. Buck 27734 [NY]
R. C. Harris 13541 [NY01708754]
On rock;, interesting specimen. W. R. Buck 27668 [NY]
R. C. Harris s.n. [NY] from Bartholomew's Cobble. Confirmed by J. Miadlikowska, 2010.
R. C. Harris 13525, R. C. Harris s.n. [NY] from Bartholomew's Cobble.
Scott LaGreca 2064 (P. stellaris) serves as a voucher for this record because the P. stellaris is mixed with some P. millegrana.; Elisabeth Lay 93-0190 [CNALH] , Elisabeth Lay 94-1073 [CNALH] , Elisabeth Lay 95-1150 [CNALH] , Elisabeth Lay 95-1151 [CNALH]
R. C. Harris 13527 [NY]
W. R. Buck 27669 [NY]
The 3 MIN vouchers were TLC'd and found to contain usnic acid only (870133 and 870135) and usnic/sekikaic/homosekikaic acids (870136). The latter is a rare chemotype of R. americana (LaGreca 1997).; Williams s.n. [MIN] , Williams s.n. [MIN] , Williams s.n. [MIN]
This record is based on a map of R. culbersoniorum in LaGreca's Ph.D. thesis (1997). The voucher specimen is deposited in either NY or US. Identification is tentative based on the chemistry of this specimen (Usnic and stenosporic acids).
R. C. Harris 13548 [NY]
R. C. Harris 36532 [NY]
W. R. Buck 27684 [NY]
Interesting specimen: thallus green when wet. Buck 34548 [NY]
W. R. Buck 27680 [NY], W. R. Buck 27727 [NY], W. R. Buck 34548 [NY], W. R. Buck 34560 [NY]