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ON SOME RUSTS AND MILDEWS IN INDIA. 2G1
very finely luberculated, and not thickened anywhere as a rule,
though occasionally a slight thickening at the apex is observable,
A piece of stalk usually adheres to the spore. After lying some
hours in water the spores measured 32-23 x 19-14 /l*. They
refused to germinate, apparently requiring a long period of rest.
Remarks.—Four species of Uromyces are recorded in Saccardo's
' Sylloge Fungorum,' on species of Lathyrns, namely, U. Fahm
Pers., U. Pisi Pers., U. Ldtlujrinm Speg., and U. pohjmorphm
P. & C. The Indian species corresponds fairly closely with U. Pisi,
and may, at any rate provisionally, be classed with it. At the
same time no ^cidium on any species of EupJwrhia is yet known
in the plains of India, though such might be found on search. In
the description of the fungus on Cicer arietinxun mention was made
of Schroter's article on " Servian Fungi," and I observe that he
includes a Uredo and Uromyces on Lathyrns latifolius also under U.
Pisi; in other words, the two fungi on Cicer and Lathyrns are,
according to him, identical. The characters of the uredospores, as
I have described them above, agree closely enough to warrant the
assumption that they are identical, the only diiference being that
whilst I could find only four germ-pores in the uredospores from
Cicer I found five to six in those from Lathyrns. But this point is
difficult to be very certain about.
PucciNiA Fagopyri Barclay, on Faqopyrnm csculentnm ]\Ioench
("Phapra," " Ogra," " Kathu").
I have described this fungus elsewhere,* but my knowledge is
imperfect. I found plants very largely attacked in October, the
leaves bearing immense numbers of black and brown pustules all
hypophyllous. The brown pustules contained uredospores, which
are pale brown, echinulate, oval, 23 x 18 ^w. on an average. "When
placed in water they germinate in the usual way. The black
pustules contained teleutospores, which are deciduous, with a small
fragment of stalk adhering to the detached spore. They are dark
brown, very variable in size and shape, slightly constricted at the
septum, smooth on the surface, shghtly thickened at the apex, and
measuring 36-25 x 13-11 /x. The upper cell is often much broader
than the lower, and is more or loss globular. The apical thickening
measures 4 p., whilst the rest of the cell- wall is 2 jjl.
Description of the Plate.— 1, P. Sor(jhi ? : a, uredospore, x 350; b, c,
teleutospores, x 350; d, paraphyses, x 35(t. 2. P. Sorglit ? : germinated
teleutospore. 3. Ditto, x 15i». 4. Melainpsora Lini : a, uredospore, x 350;
b, teleutospore, x 350. 5, Uromyces Pisi ? on Cicer : a, perminated uredospore,
X 220; b, ditto, 350x220. Uroiinjces Pisi, on Lathyrns: a, germinated
uredospore, x 220 ; b, ungerminated uredospore, x 350 ; c, germinated uredospore,
showing genii-pores, x 350 ; d, teleutospores, x 350.
* ' Journal of the Asiatic Society of Bengal,' vol. lix. pt. 2, No. 2, 1890.