"551. Gyrophora proboscidea, arctica: Ach. Syn. p. 65. Tab. xxx. fig. 4.
Expl. Iconis. a. Superf. supina. b. Superf. prona. mag. nat. c. Apothecium et portio
thalli sub lente visi.
Hab. On rocks on the Barren Grounds ; more abundant towards the Arctic Sea than the
following species.
552. G. hyperborea : Ach. Nov. Act. Stockh. xv. t. 2. f. 2. Ach. Syn. p. 66.
Tab. xxx. fig. 3.
Expl. Iconis eadem ut in pręcedenti.
553. G. pensylvanica : Ach. Syn. p. 67. Muhl. Cat. p. 105. Tab. 30. Fig. 2.
Expl. Icon : a. supeficies thalli supina, b. superf. prona mag. nat. c. apothecium et
portio thalli exsecti sub lente visi.
554. G. Muhlenbergii : Ach. Syn. p. 67. Muhl. Cat. p. 105.
Expl. Icon. a superficies thalli supina, b superficies partis thalli prona mag. nat. e.
pars thalli cum apo-thecio exsecta, et sub lente visa.
Hab. This and the three preceding species were found in greater or less abundance in all
rocky places throughout our journey. We used them all four as articles of food, but not having
the means of extracting the bitter principle from them, they proved noxious to several of the
party producing severe bowel com-plaints.
The Indians use the G. Muhlenbergii, rejecting the others, and when boiled along with fish-roe or
other animal matter, it is agreeable and nutritious. On the Barren Grounds this lichen is scarce,
and we were obliged to resort to the other three, which served the purpose of allaying the appetite,
but were very inefficient in recruiting our strength.
555. G. vellea, Ach. Syn. p. 68. Umbilicaria vellea. Mich. Fl. Am. ii. p. 323.
Hab. on shady and moist rocks, most luxuriant in woods. This is more agreeable to eat than
any of the preceding species, but we met with it very sparingly on the Barren Grounds."
