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CYCLOCARPINE [LEPTOGIUM 
14. L. minutissimum Fr. Summ. Veg. p. 122 (1846) ; Koerb. 
Parerg. Lich. p. 423 (1865).—Thallus thin, minutely lobate, the 
lobes imbricate, more or less deeply crenate, olive- or bluish-green 
or brownish. Apothecia superficial, minute, concave, reddish- 
brown, with a paler thin entire margin; spores oblong-ovoid, 
5-septate and irregularly muriform, 24-30 w long, 9-15 p thick. 
—IL, fragrans Mudd Man. p. 46 (1861) (non Cromb.); Leight. 
Lich. Fl. p. 30 pro parte. LL. lacerwm var. crenatum Nyl. ex 
Carroll in Journ. Bot. iv. p. 22 (1866). L. sinuatum var. 
crenulatum Nyl. ex Cromb. in Journ. Bot. xi. p. 336 (1874); 
Leight. Lich. FI. ed. 3, p. 30. L. subtile f. latiusculum Nyl. ex 
Joshua in Grevillea iv. p. 43 (1875) (errore flatiusculum) ; Leight. 
Lich. Fl. ed. 3, p. 29. Collema minutissimum Flerke Deutsch. 
Lich. v. p. 14 (1819). C. fragrans Tayl. in Mackay Fl. Hib. ii. 
p. 107 (non Hook.). 
Allied to L. subtile but differing in the more developed thallus and 
the persistently large spores. It looks somewhat like a miniature 
L. lacerwm. The apothecia are numerous and crowded and extremely 
regular and dainty in appearance. 
Hab, On the ground, rarely on trunks of old trees in inland dis- 
tricts.—Dist. Scarce in S.W., Central and N. England and in 
8. Ireland.—B. M. Halstead, Kent; Butler’s Holt, Bucks; near 
Cirencester, Gloucestershire; Ayton, near Cleveland, Yorkshire ; 
Bantry, Cork. 
15. L. cretaceum Nyl. in Act. Soc. Linn. Bord. sér. 3, 1. 
p- 270 (1857).—Thallus effuse, appressed or in small clustered 
rosulate lobules, or of deeply crenate minute lobes, unequal and 
rather crowded, olive-brown or dark-olive (I + red). Apothecia 
small, at first concave, becoming plane, reddish-brown, the margin 
entire, paler; spores ovoid, 3—7-septate and muriform, 22—40 p 
long, 11-17 p» thick.—Mudd Man. p. 45; Cromb. Lich. Brit. 
p. 7; Leight. Lich. Fl. p. 32; ed. 3, p. 27. Lichen cretaceus Sm. 
Engl. Bot. t. 738 (1800). Enchylium cretaceum 8. F. Gray Nat. 
Arr. i. p. 398 (1821). Collema cretaceum Hook. in Sm. Engl. FI. 
v. p. 210 (1833). 
The rosulate lobes are very characteristic, even though often but 
poorly developed. Sometimes the thallus is largely formed of isidiose 
granules. 
Hab. On cretaceous and siliceous chalky nodules in moist shady 
inland tracts. Distr. Rather rare in the Chalk and Oolite districts of 
S. and W. England, probably often overlooked.—B. M. I. of Wight; 
Plumpton, West Dean, Preston and Eastham, Sussex; Bisley 
Common, Chedworth Woods and near Northleach, Gloucestershire ; 
Folkestone, Kent; Shiere, Surrey ; Stokesay, Shropshire. 
16. L. diffractum Krempelh. ex Arn. in Flora xliv. p. 258 
(1861).—Thallus small, adnate, granular-areolate, radiate-lobate 
at the circumference, granules and lobes convex, light or dark 
olive-brown. Apothecia not seen rightly developed.—L. placo- 
