116 E. A. Vainio, Lecideales. 



Var. alcicornis (Lightf.) Schaer. 



Lich. Helv. Spic. VI (1883) p. 294; Vain. 1. c. II p. 385, III p. 

 260. Lichen alcicornis Lightf. Fl. Scot. II (1777) p. 872 p. p.; Acli. 

 Lich. Suec. Prodr. (1798) p. 184. CI. foliacea Willd. Fl. Berol. (1787) 

 p. 363. 



Exs. Floerk. Deutsch. Lich. (1815) n. 58. — Fr. Lich. Suec. Exs. 

 (1826) n. 210. — Floerk. Clad. Exs. (1829) n. 6. — Havaas Lich. Exs. 

 Norv. (1905) n. 269. — Malme Lich. Suec. Exs. XXX (1918) n. 731. 



Thallus primarius squamis angustioribus, vulgo circ. 1 

 (rarius O.s — 3) mm latis, subtus sulfureis albidisve, KHO ncn 

 reagentibus, rhizinis marginalibus obscuris saepe instructus, 

 KHO non reagens. 



Distr. Ad terram in pinetis et ericetis et campis ste- 

 rilibus arenosis calcariisve (sec. Flot, cet.) crescit, in locis 

 vulcanicis et ubi silex abundat frequentius occurrit sec. 

 Jatta (Mon. Lich. It. Merid. p. 87). Sec. E. Nylander locis 

 ventosissimis in Alandia passim, velut in Jurmo, Kokar, 

 Signilskar, tantum ster. (Al. Lafveg., 1857, p= 81). 



Thallus primarius persistans, squamis circ. 5 — 30 mm longis, 

 circ. 0.30 — 0.45 mm crassis, superne stramineo-glaucescentibus vel 

 flavidis aut pallido-flavescentibus, strato corticali 0.o4o — O.ioo mm 

 crasso, in strato meduUari hyphis materia granulosa straminea 

 incrustatis (sec. Zopf granulis calcii oxalatici), sec. Zopf (Beitr. 

 Chem. Mon. Clad. p. 90, 102) acidum laevo-usninicum (0.5 °/q) et 

 fumar-protocetraricum (V3 °/o) continentia. Podetia e lamina thalli 

 enata, long. — 13, prolifera — 17 mm, basi crass. O.5 — 2 mm, 

 scyphis 2 — 5 mm latis, saepe e centro aut e margine proliferis, 

 aut ascypha, flavescentia aut glaucescentia aut raro sulfurea, 

 cortice continuo aut areolato, partibus decorticatis sulfureis aut 

 albidis, squamis destituta aut praesertim margine scyphorum 

 squamosa, parietibus O.2 — 0.5 mm crassis, strato chondroideo 

 indistincte limitato. Apothecia lat. 0.8 — 2.3 mm, subtestacea aut 

 rarius fusca, convexa, suffulta. Sporae oblongae aut rarius fusi- 

 formi-oblongae, long. O.oos — O.ou, crass. O.002 — O.0035 mm. Coni- 

 dangia late ovoidea vel mammaeformia aut subglobosa, lat. 

 0.290 — 0.400 mm, basi bene aut leviter constricta, fuscescentia aut 

 rufescentia aut testaceo-pallida. Conidia cylindrico-fusiformia aut 

 p. p. subcylindrica, leviter curvata, long. O.007 — O.oio, crass. O.0005 — 

 0.001 mm. 



