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208 LICHENACEI. [ALECTORTA, 
38. ALECTORIA Ach. Lich. Univ. (1810) p. 592 pro parte; 
Nyl. Syn. p. 277.—Thallus filamentose, often intricately branched, 
concolorous on both 
sides, somewhat shi- __ 
ning ; medullary layer | \ 
loosely arachnoid or | 
lacunose, not readily i_! 
separating from the @ 
cortical layer, which 
is corneous, formed of 
subparallel filaments 
closely conglutinate. 
Apothecia discolorous, 
or rarely subconcolo- 
rous with the thallus, 
rarely with ciliate 
margin; hypothecium 
colourless ; spores Snze Fig. 41. 
and small, or 2—4ne Alectoria ochvoleuca Nyl.—a. Vertical section of 
; a young apothecium, x30. 6. Theca and 
and larger, very rarely parapbysis, x 350. ¢. Spores, x 500. d. 
b 
murali- divided, a el- Longitudinal section of thallus with a sper- 
lipsoid, sometimes mogone, X 380. ¢. Sterigmata and spermatia, 
at length becoming x 500. 
brown ; hymenial gelatine bluish with iodine. Spermogones lateral, 
inclosed in thalline tubercles, the conceptacles externally blackish ; 
spermatia acicular, fusiformi-incrassate towards either apex. 
The species of this genus are characteristic of mountainous regions, and 
several occur in great abundance in suitable localities. In some the thallus 
becomes at length free from the substratum, because of the decay and 
death of the lower portion, which does not, however, prevent them from 
freely vegetating. 
a. Apothecia lateral or pseudo-terminal; spores 2-4nx, somewhat 
large, colourless or at length brown. (Hualectoria Fr. fil. 
Gen. Heterol. (1861) p. 48.) 
1. A. ochroleuca Nyl. Mém. Soc. Cherb. v. (1837) p. 98.—Thal- 
lus ceespitoso-fruticulose, rigid, erect, rounded or somewhat com- 
pressed, smooth, or here and there lacunoso-impressed, much and 
divaricately branched, ochroleucous or whitish straw-coloured ; 
branches attenuate, the apices recurved and usually blackish 
(Ket yellowish CaCl—), Apothecia large, innato-sessile, at length re- 
pand, bright brownish-red or brownish-black, the margin inflexed 
or excluded; spores 0,028-42 mm. long, 0,014-24 mm. thick.— 
Mudd, Man. p. 73; Cromb. Lich. Brit. p. 24; Leight. Lich. Fl. 
p. 87, ed. 3, p. 79.—Cornicularia ochroleuca Hook. Fl. Scot. ii. 
p. 69; Sm. Eng. Fl. v. p. 229. Lichen ochroleucus Ehrh., Beytr. 
iii. (1789) p. 82; Dicks. Crypt. fase. iii, p. 19; With. Arr, ed. 3, iv. 
p. 46 pro parte; Eng. Bot. t. 2374.-- Brit. Evs.: Cromb. n. 126. 
