LICHENS AND LICHEN. PARASITES

DODGE-LICHENS AND LICHEN PARASITE8
Cenmyce pertltsa Pers. in Gaudich., Voy. "Uranie" Bot., 213; 1826
Cladonia pertusa Mass., Mem. R. 1st. Veneto, 10, 45; 1861.
~enokyce awtrdis Pers. in Gaudich., Voy. "Uranie" Bot., 213 ; 1826.
/
Ddfoureu collodes Hook. f. & Tayl., London Jour. Bot., 3, 650; 1844.
Cenomyce diatrypa Tayl., London J,our. Bot., 6, 186; 1847.
Types: C. aggregata from Jamaica, Swartz; B. tqbratus from Rhunion, Bory de St. Vincent;
C. pertusa from Brazil, Rio de Janeiro, Gaudichaud ; C. Artralis from Australia, Blue Mountains,
Port Jackson, Gaudichaud; D. co!hdes from Campbell Island, J. D. Hooker (Voy. "Erebus and
Terror") ; and C. diafrypa from Australia, Macquarie River, Robert Hall's herb.
Podetia forming dense tufts, 3-5 cm. tall, dying at the base and prch'fewting at the apices,
very fragile and breaking apart, starting new colonies; 1-2 mm. in diameter._eyliLdric, branching
dichotomous, divaricate, axils somewhat dilated, usually closed, very-rarely perforate, ultimate
branches and internodes short, sometimes appearing almost tri- or tetrachotomous, often tipped
with spermogonia or apothecia, perforations round to elliptic, variable in size and position, not
abundant; cortex 30p thick, outer 10p yellowish brown, disintegrating into a gel, rest hyaline,
composed of very slender, longitudinal, conglutinate hyphae, closely interwoven ; algal colonies
of Trebouxia, about 20-25p in diameter, discrete and scattered on the under surface of the cortex,
whose hyphae grow inward to surround the colony and form a loosely woven medulla between the
colonies; chondroid axis absent.
Spermogonia ellipsoid, cylindric, constricted at the base, black ; spermatiophores 10-15p long,
branched at the base, tapering toward the apex; spermdia cylindric, slightly curved, 5-6 X lp.
The apothecia are very immature in our &aterial. From the limited material of this species
available to me, it seems probable that a study along the lines of des Abbayes (R6vision mono-
graphique des Cladoniadu sous-genre Cladina (Lichens), Bull, Soc. Sci. Bretagne, 16, 2, 1-156;
2 pl., 1939) would reveal several different species now referred to C. aygregata, but in the absence
of types, such a revision is impossible at this time. I have included all of the synonyms from the
Eastern Hemisphere. Our material has the branching and habit of Dufourea collodm Hook. f. and
Tayl. There is also a very small, immature plant (B.A.N.Z.A.R.E. B540-8): which I have referred
here for want of more adequate material, with a somewhat different branching.
Macquarie Island : H. Hamilton, A.A.E. 1658-3 ; Featherbed Flat (Sta. 81a), B.A.N.Z.A.R.E.
B531-8, B531-9 ; north end of Island, Sta. 81, B.A.N.Z.A.R.E. B540-8.
CLADONIA [Hill] Weber.
Cladonia [Hill] Weber in Wiggers, Prim. F1. Holsat., 90, 1780.
Cladonia Hill, Gen. Nat. Hist., 2, 91 ; 1751 [Hist. PI.] polynomial nomenclature.
Pyxidium [Hill] Pers., Neue Ann. d. Bot., 1, 19; 1794. Ach., K. Vetenslc. Alcad. Nya Handl., 15,
256 ; 1794.
Pyxidium Hill, Gen. Nat. Hist., 2,94 ; 1751 [Hist. Pl.] polynomial nomenclature.
Xcyphophosum Necker, Element. Bot., 3, 350 ; 1790. uninomial nomenclature.
Bcyphophorus Ach. [as subgenus], Lich. Suec. Prodr., 3,183 ; 1798. Michaux [as genus], F1. Bor.
e
Am. 2,328 ; 1803.
flcyphophora Gray, Nat. Arr. Brit. Pl., 1,417; 1821.
Helopodfiunz Ach. [as subgenus!, Lich. Suec. Prodr., 3, 198 ; 1798 ; Michaux [as genus], F1. Bor.
Am., 2,329; 1803.