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PUCCINIA DIGEAPHIDIS. 215
Spores from whicli were ripe and germinating on May 27tli. No
result followed on Allium.
2. May 5tb. — With artificially produced teleutospores and
promycelium-spores from Phalaris, which were in a state of germination,
I infected P. arinuUnacca, Covvalhoia, Allium, Arwii maculatum,
Puli/(jonatum multijUirum, and Lilium bulldfenun.
Spermogouia appeared on ConvaUaria on May 14th, and beyond
slight yellowish spots appearing on Puhji/imatum, not the least
result followed on Phalaris, Allium, Arum, or Lilium.
3. May 12tli. — Orchis mascula, Gayea lutea. Allium Scorodoprasum,
A. ursiimm, Scilla nutans, Poli/(/ouatum. officinale, P. inultiflomm.
Arum maculatum, ConvaUaria majalis, and Phalaris arundinacca,
were infected with germinating teleutospores and promycelium-spores
from Bowness, with the result that spermogonia were
developed on ConvaUaria on May 20th, and were succeeded by
jecldium cups on June 6th, No result ensued on Allium, Arum, or
any of the other species.
4. May 22nd.—The last-mentioned experiment was repeated,
additional plants of ConvaUaria being used, with the same results.
Spermogouia were conspicuous by June 1st on ConvaUaria, but no
result whatever on the other plants.
5. May 27th.—Germinating tecidiospores from ConvaUaria were
applied to the leaves of other plants of the same species. No
results.
6. May 31st. Phalaris ariindinacea was infected with artificially
produced a;cidiospores from ConvaUaria majalis. Result : on June
18th red spots of uredo were conspicuous on the leaves.
7.—Three plants of ConvaUaria from Bowness, infected by the
fficidium, were planted on June 13th, 1889, and kept isolated.
This year the plants are healthy, and up to the present time
(June 19) are entirely free.
Mr. Plowright* has also produced the fecidium on ConvaUaria, at
King's Lynn, from teleutospores on Phalaris from Bowness.
Puccinia digraphidis, n. sp.
1. [JEcidium Convallaritr).—Pseudoperidia mostly hypophyllous,
seated on whitish or yellowish circular spots, circiuating, or in
small clusters, more elongated and irregular on the petiole, shortly
cylindrical or nearly flat, margins white, torn. Spores sub-globose,
epispore minutely verrucose, contents orange, 15-30 x 14-22 /x.
On ConvaUaria majalis.
2. Sori on yellowish spots, small, reddish brown, subrotund or
linear, sometimes confluent, scattered or collected in groups,
erumpent. Spores subglobose or elliptical, epispore finely punctate,
orange-red. 20-DU/x. in diameter. On Phalaris arundinacca.
8. Sori numerous, persistent, black, covered by epidermis, at
first small, then linear, confluent, forming lines 1 to 3 mm. long
on the leaves, longer on the sheaths. Spores brownish, smooth,
very irregular, oblong, wedge-shaped, curved or elongate, apex of
• Gard. Chron. May 24th, 1800, p f.13.