182 THE JOURNAL OF BOTANY 
Snax aspera [S. aspera ¢ mauritanica A. DC. Mon. Phan. i. 
166, where it is entered as ‘ et (specimen h. Banks, nune in 
h. vind. forsan originis non certiss.).’’ The plant was included in 
Lette 8 list on the authority of Masson’s specimens in Herb. 
an 
S. Pse una. [Masson’s specimen, on which this entry is 
ae is raterted doubtfully in the Herbar tne to S. canariensis 
Willd. The material is insufficient for positive determination, 
consisting it does of part of a branch bearing three large avon J 
8. tarrrotia [S. pendulina Lowe.] 
Foes ACUTUS. 
. TeNAX [J. glaucus Sibth.; see Journ. Bot. 1900, 82.] 
bisa sas 
& 
CG 
osa. [I find no et an  smesonrae representing this, 
with seipcnas: in Brown’s MS. as from Masson.] 
(To be concluded.) 
MYCOLOGICAL NOTES. 
By Ernest §. Sazmon, F.L.S. 
Le Formation or Ascospores in ErysipHe GRraminis. 
a fact of some interest to find that EL. Graminis is able, 
under favourable circumstances, to produce, as soon as the peri- 
the beginning of July on Secale cereale, Hordeum murinum, Bromus 
commutatus and B, sterilis. Leaves-of these species bea aring peri- 
thecia were placed on wet filter-paper at the bottom of a Petri dish. 
The protoplasm of the asci at once began to form ascospores, and in 
about ten days the perithecia opened with a more or less regular 
- circumscissile dehiscence,* and the asci threw up ripe ascospores, 
which after a few hours seidcntainenh freely in the drops of condensed 
water on the lid of the Petri dish. On dAgropyron repens a general 
formation of perithecia had taken place as early as the beginning of 
June. On June 8th some of these perithecia were placed on wet 
filter-paper, and by June ni most of the asci had developed four 
to eight young ascospor 
Three experiments ane carried out, which prove that the asco- 
spores formed at this time of year are able to infect at once their 
* Ihave fully described the manner of this spontaneous dehiscence of the 
perithecium in this Journal for 1903, p. 161. 
