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DODGE-LICIEE)NB <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong> 221<br />
and finally very convex, with yellowish glaucous prnina; amphithecial cortex 55p thiclr, of the<br />
same structure as that of the thallus, mechanical tipsue increasing in thickness upward, of the same<br />
texture as that of the thallus but the component hyphae more contorted and interwoven: algae<br />
1ini11~ the cavity at the end of the branch bnt not penetrating into the mechanical tissue below<br />
the hypothecium ; mechanical tissue continued under the hypothecium as a layer about 75,; thiclr ;<br />
hypothecium not clearly differentiated except as a deeply staining zoiie below the theci~un, about<br />
2OP thiclr; theeinni 3540p tall; paraphyses slender, abont thrice dichotomous above the asci, ending<br />
in slightly swollen gelified tips; asci cylindric, 30-33 X 10-l2p, tips thiclrened; ascospores<br />
2-celled, hyaline, ends subacute, not constricted at the slightly thiclrened septum, 8-10 X 5-6~.<br />
This entity belongs in the sect. Euramalina. Stzbgr. ~ubsect. Pistularia Vainio. If the<br />
presence or absence of true'cortex has the validity usually assigned to it, our plants cannot be<br />
referred to R. inpata, but until I have seen Inore New Xealand material I hesitate to elevate the<br />
entity to specific rank mder a iiew name or to refer it to another species as a variety. Rantalinu<br />
s?tbgeniczdatn Nyl. (type from Madeira) is probably not a synonym as stated by Miiller-Argau.<br />
BLASTENIACEAE.<br />
Thallus crustose, indeterminate or effigurate, small foliose or dwarf fruticose, attached to the<br />
substrate by l~yphae of the pro-thallns, or of the medulla (or by rhizinae in Xanthoria), heteromerous;<br />
ecorticate or fastigiate corticate (except in Mamonia) ; algae protococcoid. Apothecia<br />
ronnd, sessile or immersed, biatorine, lecideine or lecanorine, usually with an algal layer beneath<br />
the hypothecium; epithecium granular or powdery, usually containing chrysophanic acid (producing<br />
a purple or violet colour with KOH) ; paraphyses simple, septate, tips usually thickened ;<br />
asci normally 8-spored ; ascospores hyaline, thick-walled, usually polari-bilocular.<br />
Apothecia biatorine, but algae may occu; beneath the hgpothecinm.<br />
Spores ~ulicellular . . . . . . . . . . . . Protobla8tenia<br />
Spores polari-bilocular . .<br />
Thallus crnstose, indeterminate, ecorticate . . . . . . . . Blastenia<br />
Thallns effigurate, corticate . . . . . . . . . . Kuttlingm'a<br />
Spores 4-celled . . . . . . . . . . Xmthocarpia<br />
-4pothe:ia lecideine, thallus crustose; indeterminate, spores polaribilocular . . H?iea<br />
Apothecia lecanoriile<br />
Spores unilocular<br />
Thallus effigurate . . . . . . . . . . Ptclgensiu<br />
Thallus dwarf fruticose . . . . . . . . Polyca8?diona Chwcoti<br />
Spores polari-bilocular<br />
Thallus indeterminate, usually ecorticate . . . . . . Pyrenodesmia<br />
Thallus effigurate, usually corticate . . . . . . Cf asparrinia<br />
Thallus small foliose, cortieate, with rhizinae . . . . . . . . ,Tonthoria<br />
Thallus dwarf fruticose to frnticose<br />
Apothecia immersed in tubercles without algae ; true parathecinm not developed ;<br />
cortex of longitudinal hyphae . . . . . . . . .. .Wuwsonia
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