Floren — Lichenen 
39 
U. Hemidesmi (auf Hemidesmus indicus Br.), 
U. Callicarpae (auf Callicarpa lanata L.), 
U. Amomi (auf Amomtan involucratum 
Trim.), 
U. Discoreae -pentaphyllae (auf Dioscorea 
pentaphylla L.), 
U. Ischaemi-ciliaris (auf Ischaemum ciliare 
Retz.), 
U. Ischaemi-commutati (auf Ischaemum com- 
mutatum HACK.), 
U. Anthistiriae (auf Anthistiria imberbis 
Retz.), 
U. Anthistiriae-tre?milae (auf Anthistiria 
tremula NEES), 
U. Ochlandrae (auf Ochlandra stridula 
Thw.). 
Matouschek (Wien). 
Die Diagnosen sind englisch gehalten. 
ROD WAY, L., The Hymenogastraceae of Tasmania (Papers and 
Proc. Roy. Soc. Tasmania 1911, 21—31; 1 pi.). 
The author states that in Tasmania out of a fungus flora of less 
than seven hundred species there are nineteen Hymenogastreae. Com¬ 
paring these numbers with these of the British Flora he assumes that 
nearly, if not all, the Hymenogastreae of the colony must have been 
described; otherwise there must be present a most astonishing number. 
The object of the present paper is to bring together the knowledge of the 
Tasmanian forms for the benefit of local students. There are some general 
statements giving an idea of the classificatory position of this family. 
Then follows a key to the genera. There is a description of each genus 
and species. J. Ramsbottom (London). 
BACHMANN, F. M., A new type of spermogonium and fertilization 
in Collema (Ann. Bot. 1912, 26, 747—769; 1 pi.). 
Bach mann has studied an American form of Collema pulposum 
Ach. As her results differ greatly from what Stahl, Sturgis and 
others observed in this species she gives a long description of the form 
she has investigated. The following is the author’s summary: 1. The 
spermatia of Collema pulposum are not borne in spermogonia, but are 
few in number and are borne terminally and laterally on a hypha below 
the surface of the thallus. They are completely embedded in the thallus 
and are never set free. They are entirely homologous with the spermatia 
borne in spermogonia in other species. 
2. The carpogones, as in other Lichens , are embedded in the thallus. 
These consist of a coiled basal portion, the ascogone, and a long terminal 
structure, the trichogyne. The trichogyne, the end cell of which is excee¬ 
dingly long, does not grow toward the surface of the thallus and protrude 
from it, but instead grows more or less horizontally within the thallus 
towards the region where the spermatia are borne. The sexual apparatus 
is thus completely submerged in the tissue of the thallus. 
3. There is a very evident attraction of the spermatia for the tricho- 
gynes, which is seen in the manner in which the latter converge about a 
group of spermatia. In growing towards a spermatium and often coiling 
about it the trichogyne shows a greater activity than that which has been 
described for other Lichens. 
4. The spermatium fuses with the trichogyne to which it has become 
attached. After this fusion the cross-walls of the cells next to the long 
terminal cell exhibit the characteristic changes which has been described 
by other investigators. 
5. It is very evident that the spermatia and trichogynes are functional, 
and that there is not merely a reduced form of fertilization in Collema 
pulposum. 
