ON MORCHELLA BISPORA. 119 
of the ovary and its parts. Great interest attends the smallest struc- 
tural points in solitary outlying forms, spake scarcely any genus is so 
isolated as the subject of M. Poisson’s memoi 
On MorcHELLA BISPORA. 
Zur Kenntniss er Morchella bispora. Von Prof. N. Soroxrye. 
(‘Botanische Zeitung,” Sept., 1876.)—Morchella ‘iiprs, Agee 
fro 
at first sight differs pss but little from M. eseu and 
M. bohemica, from both of which it is readily distinguished re its 2- 
spored asci. he height of the stem varies between 10 ctm. and 
pinot nothing ; its surface is often provided with a soft white clothing 
composed of small hairs which are detached by the slightest touch, 
forme r 
saree together at the periphery of the stem, but less closely in the 
central parts; the peripheral cells are usually short and the central 
= ong. Specially noticeable are cells with dark protoplasmic con- 
tents, which it is suggested may be foreshadowings of a laticiferous 
system. The contents of the ordinary cells consist of transparent 
vacuolar protoplasm. “The hymenial layer is composed of asci and 
ranched many-celled paraphyses. During development the cells 
destined to become asci at first differ scarcely at all from the other 
cells of the pileus, but afterwards they become broader and longer, and 
fill with granular protoplasm which soon becomes differentiated into a 
Select Ow acs occupying the upper part of the young ascus, 
and a tenacio ous hi por tion. A ve 
thir st scarcely SAE but soon clearly 
defined elliptical bodies are then found in the protoplasm ; these are 
the young spores, during the formation of which the protoplasm 
the basal portion of the ascus. The ripe spores are narrowly elliptical 
number of spores in the ascus is very constant, for out of the several 
ndred examined only one had a single spore and two had three 
spores. 
‘iM. bispora is found in the Russian governments of Kazan and 
Kursk, but it grows in Western Europe also, if M. Sorokine is right 
in referring to this species a Morchella with 2-spored asci found in 
France, and originally referred by Desmaziéres to M. bohemica, 
British radogetd cate would do well to look out for it. 
SrrucTURE OF THE TESTA IN CccURBITACES. 
Ueber die Anatomie und sagt ts ph der Samenschalen, 
einiger Cucurbitaceen, Von Dr. 1. F. Frexen. (‘ Botanische Zeitu ag 
