Cullema.~\ 
VII. LICHENES. 
557 
moniliforra strings of naked granules. Apothecia rufous, with a thalline 
border ; spores in eights, simple or variously divided. 
A large genus of Lichens, found on rocks, bark, etc., in many parts of the world, some- 
what resembling Nostoc. The New Zealand species do not appear to be taken up by 
Nylander in his ‘ Synopsis Lichenum.’ 
1. C. flaccidum, Ach.; — Bab. in FI. N. Z. ii. 309. Thallus membranous, 
lobed, dirty green, blueish or greenish-brown, larger lobes expanded, flexuous. 
Apothecia reddish, flat, middling-sized ; spores ovoid or broadly fusiform, 
septate. 
Northern Island : common on trees, Colenso, J. D. //., etc. (Europe, America, Aus- 
tralia, etc.) 
2. C. pulposunij Ach.; — Bab. in FI. N. Z. ii. 310. Thallus dirty 
green or greenish-brown, orbicular, lobed ; lobes thick, crenate, subimbri- 
cate, often plaited. Apothecia middling-sized, flat, border entire ; spores 
ovoid, usually 3-septate. — Nyland. Synops. Lich. 114. 
Northern Island, Colenso. — Specimens imperfect, barren, hence very doubtful. I find 
none in the Herbarium. (Europe, America.) 
3. C. nigrescens, Ach. — Yar. leucocarpum , Bab. in El. N. Z. ii. 308. 
Thallus black-green, membranous, orbicular, depressed, lobed, radiately 
plaited. Apothecia lilac, glaucous, flat, crowded; border entire; spores 
cylindric-fusiform, usually many-septate. — C. leucocarpum, Tayl. C. glaucoph- 
thalmum, Nyland. Synops. Lich. 114, ex ejus Lich. Nov. Caled. 
Northern Island, Colenso. Middle Island, D’Urville ; Otago , Lindsay. (Found in 
all parts of the globe. C. nigrescens is cosmopolite, var. leucocarpum is found in Britain, 
Mexico, and New Caledonia.) 
4. C. fasciculare, Ach. — Yar. Colensoi, Bab. in FI. N. Z. ii. 309. 
Thallus suborbicular, rigid, cartilaginous, blue when dry, fixed by the centre, 
green when moist ; lobes rounded, sinuous, crisped. Apothecia crowded on 
the margins of the lobes, minute, rufous, without a border. 
Northern Island : on twigs, Colenso. — I do not find this species in the Herbarium, nor 
any notice of it in Nylander’s Synopsis. 
5. C. plicatile, Ach. Thallus greenish-brown, imbricate, lobed ; lobes 
erect or ascending, plaited, crisped. Apothecia scattered, reddish ; border 
entire; spores ellipsoid-fusiform, usually 3-septate. — Nyl. Synops. Lich. 109. 
Auckland, Knight {Mitten). (Europe.) 
6. C. contigimm, Knight and Mitt, in Linn. Trans. 23. 106. t. 12./. 
35. Thallus dull green, black when dry; lobes tufted, complicate. Apo- 
thecia small, crowded, marginal, pale brown ; spores ellipsoid, multilocular. 
Northern Island: Auckland, on wood, Knight. 
3. LEPTOGIUM, Acharius. 
Thallus as in Collema, but usually thinner, all cellular or with a cellular 
cortical layer. Apothecia with a thalline border, which is concolorous with, 
or paler than, the surface of the disc; spores in eights, ovoid or ellipsoid, 
variously septate or divided. 
