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90 THE BRITISH SMUT FUNGI<br />

TuBURCiNiA Fries em. Woronin,<br />

Abh. Senck. Nat. Ges., xii, 359-591, 1882<br />

Type: Tvburcinia trientalis Berk. & Br. on Trientalik europaea, Scotland.<br />

Synonym: Ginanniella Ciferri, 1938. •<br />

Sori usually in the stems and leaves, and rather permanently embedded in the<br />

host tissue. Spore balls composed of a number of firmly united fertile spores<br />

only. Sporidia sometimes produced in the host plant before spore development.<br />

Liro (1922) monographed the genus Urocystia as Tuburcinia Fr. but a<br />

proposal has been made for the conservation of the name Urocystis, see p. 92.<br />

Tubuicinia piimulicola (Magn.) Bref.<br />

Urocystis primulicola P. Magnus, Verh. bot. Ver. Brandenburg, xx, p. 53, 1878.<br />

Tuburciniaprimulicola (Magn.) Brefeld, Untersuch. Ges. Mykol., xii, p. 180,1895<br />

[as 'Rostrup'].<br />

Paepalopsis irmischiae Kiihn is considered to be the stat. eonid.<br />

Sori in the ovaries. Spore mass brown-black, powdery. Spore balls globose or<br />

somewhat elongated, dark brown, 30-60 X 20^5 /J.. Spores globose to ovate, dark<br />

brown, wall about 2 [J, thick, smooth, 10-15 ^ diam. Sporidia (in ovaries and<br />

anthers of young flowers) globose or elongated, hyaline, smooth, 4-12 X 4-6 [i.<br />

On Primula farinosa and P. vulgaris.<br />

March, July-Aug. England, Scotland. Uncommon.<br />

Spore germination has been described and figured by Pirotta (1881), Plowright<br />

(1889) (Pig. 15 c), Brefeld (1895) (Fig. 15 d), and Cocconi (1890). The promyceUa<br />

produce terminally one to four short cylindrical sporidia which fuse in situ or<br />

after abscission and give' rise to secondary sporidia. Under some conditions<br />

promycelia form only simple or branched hyphae. Germination, occurs immediately<br />

the spores are ripe (Kiihn, 1892).<br />

Infection of the host. Kiihn (1892) inoculated in May young plants of Primula<br />

vulgaris with germinating sporidia {Paipalopsis irmischiae), kept them for<br />

several days in a moist atmosphere, then in a cold glasshouse. In April of the<br />

following year first sporidia, then chlamydospores, developed on the flowers of<br />

inoculated plants.<br />

Tuburcinia trientalis Berk. & Br.<br />

Tuburcinia trientalis Berkeley & Broome, Ann. Mag. nat. Hist., Ser. 2, ii, p. 464,<br />

1850 [Notices of British Fungi No. 488].<br />

Sorosporium trientalis (Berk. & Br.) Cooke, 1877 [as 'Sorosporium trientalis<br />

Woron.'].<br />

Ginanniella trientalis (Berk. & Br.) Ciferri, 1938.<br />

Ascomyces trientalis Berkeley, Outlines of British Fungology, p. 376, 1860 [stat.<br />

conid.].<br />

Sori in the leaves and stems forming bhster-like swellings. Spore mass granular,<br />

black. Spore balls irregularly rounded or elongated, opaque, black, 30-90 /x<br />

diam., each consisting of a large number (25-100) of firmly united spores.<br />

Spores globose to polygonal, dark yellowish-brown, smooth, 11-18 /x diam.

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